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Subqueries And Limit


I am a beginner with MySQL and I have this very large table where queries take a long time to complete. I was trying to limit the amount of time by limiting the scope of the query to only a few rows, by using LIMIT. To that effect a construct like:

SELECT * FROM table LIMIT 100;

seems to work perfectly, because it returns the 1st 100 rows from the table.

The problem is, I cannot use this in a subquery. In other words, if I try something like:

SELECT * FROM (SELECT * FROM table LIMIT 100) as temp;

I'm getting an error. I read the documentation about subqueries in the FROM clause, but I cannot figure out what's qrong with the syntax.




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Related Forum Messages:
Subqueries :: Doesn't Yet Support 'LIMIT' & 'IN/ALL/ANY/SOME Subquery'
I'm using mysql 4.17, and I'm trying to get an output of such a query:

UPDATE POST SET CLASS=1 WHERE ID IN (SELECT ID FROM POST ORDER BY RAND() LIMIT=300); but I obtain a respond message:

This version of MySQL database doesn't yet support 'LIMIT' & 'IN/ALL/ANY/SOME subquery'

What should I do then? I really need to get this output.

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Using A Limit Clause, But Return The Number Of Rows Of The Query Without The Limit
I have heard of a cool feature that mysql provides a way to return the number of rows of an sql statement that contains a LIMIT as if the LIMIT had not been there.

I search the mysql manual, but could not find anything.

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LIMIT Keyword = Full-search Then Limit The Results?
1.) Execute the query and retrieve the WHOLE list first, truncate then output the results; or..

2.) Execute the query, once the range of results has been reached, stop querying and output the results

3.) Or do something I don't know?

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Select Query With Limit Same As No Limit?
I have a question, EXPLAIN on a SELECT query seems to return the same as explain without doing a limit.

Here is a dump from my console:

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Subqueries On 4.0.25 Without Subqueries
i have 2 tables. knowing subqueries cant be performed on this version how would i write the following statement?

i have 2 tables
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I want to select all records from table.a that match table.a.id = table.b.id WHERE table.b.varchar = 'value'

once the table.b.varchar is found, get table.b.id and match it to any records in table.a.id that match it.

Can this be done in 1 statement. I'd hate to have to run a loop here. I've tried without success JOIN statements.

here is one of my attempts:
"SELECT table.a.* FROM table.a, table.b WHERE table.a.id = table.b.id AND table.b.varchar = '$value' GROUP BY table.a.sortkey ORDER BY table.a.is_primary DESC ";

this does return 1 row, and joins the 2 tables accordingly, however i need all rows in table.a that match the table.b.id where table.b.varchar = 'value'

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Use Of Subqueries With IN
I'm trying to do the following query:

select * from table1 where col1 in (select col1 from table2);

I keep getting a message to check my query after "in". But I've cut and pasted that query and it works. This is a very simple query so I don't understand why it doesn't work.

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Subqueries With ALL
I got following statement:

SELECT * FROM ip WHERE id <> ALL (SELECT ipid FROM pcip);

Like I can see in the documentation, this should be correct, but SQL drops a SyntaxError near "ALL (SELECT ipid FROM pcip)"

What it dows should be ovious, select all IPs that IDs are not noticed in the PCIP table under IPID

The Tables are set up correct, means both tables exist and got values for the mentioned collums

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Subqueries For V3.23
An upgrade is definately coming, as some some SQL practice, but I'm trying to figure out how to do a subquery and not entirely certain where to turn to.

From my limited understanding of SQL, what I want to do should look like:

SELECT
(SELECT count(SurveyData.Choice) WHERE SurveyData.Choice='0') as a,
(SELECT count(SurveyData.Choice) WHERE SurveyData.Choice='1') as b,
(SELECT count(SurveyData.Choice) WHERE SurveyData.Choice='2') as c
FROM SurveyData

The SurveyData table contains 3 fields: SID (Int), Name (Varchar 100), Choice (Int)

I'd like to use it as the basis for a reusable/scalable web survey app (perl CGI), but all I'm getting is a syntax error.

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Subqueries With NOT IN And &lt;&gt; ALL
I am having troubles with the following on 4.0.22:
select *
from question as q
where q.id NOT IN (select distinct question from choice );

choice.question ---> question.id

Apparently there's a syntax error, at (select distinct ....)
<> ALL yields the same result.

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Possible Without Subqueries
I'm trying to merge the result of 2 queries but I can't use subqueries.

The first query gets all the sign-ups from a particular referer, the second query gets how many of those sign-ups are still active.
So the first query does a count, group by ref and the second one does count where active group by ref - I know I could do this easily with subqueries but without them I'm lost.

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Subqueries?
I'm using MySQL Control Center 0.9.2-beta. Will this take subqueries? I'm trying to extract data from tables in two different databases, and I'm not all familiar with JOINS. What is the syntax to do this in a subquery? In a JOIN?

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Max() & Subqueries
Cant seem to get what i want Missing something so fundamental. Did it with subqueries on server at home just cant seem to get my head round it without using subqueries

I have 3 tables ....

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UNIONS In Subqueries
I have a problem using UNIONs inside subqueries. I have simplified my query to make it more readable. The question is about the right syntax.....

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How To Rewrite This Without Subqueries?
i have a table that contains the fields order_id, canceled, and
captured. the same order_id can appear many times in the table. i
want to retrieve all the order_ids for which NO record exists that has
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i am not able to upgrade my version of mysql at the moment, so i would
like to write a query that does that with no subqueries.

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SQL, Count And Subqueries
I have one table that lists a number of courses available (including
CourseID, CourseName and MaxPositions), with CourseID being auto_increment and unique

I have another table which has CourseRegistration (Containing CourseID and
CustomerID), with no unique fields. Customer information is stored
elswhere.

Without having a field in the Courses table holding the number of people
currently registered, how would I return a result set which included:

CourseID, CourseName, MaxPositions and the Number of people registered to
take that course.

Preferably this would not use features in MySQL 4.1, but anything is fair
game at this point.

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Theory Of Subqueries For 4.1.7
While converting SQL statements for a database change, I discovered a
big performance hit in MYSQL with subqueries vices Sybase. I'm hoping
that someone might be able to help me understand why?

I have two tables USERS (2200 records) and JOB Decriptions (163
records). I wanted to retrieve all the job description not in the
USER table. (No Indexes on JOBDESC currently)

select JOBDESC from JOBS where JOBDESC not in ( select JOBDESC from
USERS where JOBDESC not NULL )

In Sybase the query returns in about .56 secs
In Mysql 4.1.7 query returns in about 8.78 secs

The funny thing is if I run the query like so

select JOBDESC from JOBS where JOBDESC not in ('President','Vice
President','Treasaur','Secretary')
returns in .03 secs.

Those four descriptions are returned by the inner select.

All select statements individually return in .03 secs.
I created indexes on both tables for JOBDESC and reduced the time to
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hence the indexes, but why the difference in speed?

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Removing Subqueries
the query i want execute is:

select email from avalia where email in (select * from avalia where nome=´img/im1.jpg´) and email in (select * from avalia where nome=´img/im2.jpg´)

but mysql 4.0 don't acept subqueries.

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Optimization :: Subqueries
i have a little complex query that involves sub queries upto three levels. now thing is that , i think, mysql evaluates the sub queries every time that query is evaluated, whereas, i know that results for the third and 4th level queries are same for some number of queries. can we force mysql to store the result of the subqueries to be used later, instead of reexecuting the query.i studied mysql query optimization but, finally concluded is that things over there are just how mysql optimizes queries, not how can we optimize the query to be performed better. any resources for query optimization, i mean good resources ?

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Subqueries And The IN Operator
hey all,

i am having serious problems with getting my head around why this will not work. i am trying to return a number of games played with a count of the number of people in it. the table structures are as follows:

games

gameref | gamepot | gamedate | gamelength |

..1...... | .... 50.... | 12.12.04 | ... 03.00.00 |

winnings

gref | pref | amountwon | stake |
1 . .| 1 .. | ....20 ...... | 10...|

i have used the dots to try and keep the table in some sort of form. i have only entered one row of data for each just to show the format of it, if this is not enough please ask for more.

the games table holds each game that has been played, the total pot available to be won the date played and the duration of the game.

the winnings table is teh winnings of each player in each game. the gref is the game it refers to, the pref is teh player it refers to, (there is a player table but is not used in this query at all). the amount that player won and the stake they entered into the pot.

if ya didnt gues its a poker database. my problem is as follows.

Quote: $sql = ("SELECT games.*, COUNT(winnings.gref) as playercount, winnings.gref
FROM games, winnings
WHERE gameref = gref
group by gameref
order by gamedate");

this query works a treat. it counts the amount of players in each game and outputs it all nicely.. but i wanted to edit the query to be able to show just all the games a single player had been in.

Quote: $sql = ("select games.*, COUNT(winnings.gref) as playercount, winnings.gref
from games, winnings
where gameref in (select gref from winnings where pref ='$pid')
group by gameref
order by gamedate");

$pid is passed into the page by

Quote: pt_register('POST','pid');

but this throws an error

Quote: Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/ghoxmfjz/public_html/database/poker/allgames.php on line 32
Query failed!

line 32 is:

Quote: $nrows = mysql_num_rows($result);

i can get it to work if i substitute the subquery for (1,2,3) being the first 3 games played. this would assume a certain player would have been in these 3 games.

the problem i get is that the COUNT function just counts every player in everygame not the individuals. if i group it by gref it counts them (sort of.. it doubles the count) but then does not return any of the other information for the query.

i am very confused any and all suggestions of things to look at or consider or a straight ur doing XXX wrong would be grand.. thx all

Jon

oh btw if you wish to look at the output if that helps the URL is:

http://www.happygolucky.me.uk/database/poker/allgames.php

with the variable $pid as the reference to try the player.

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Subqueries Clarification
im using MySQL 4.1 the one the comes with XAMPP installer.. I have a question regarding correlated subqueries..in this version of
MySQL, are correlated subqueries supported?

as in like..

$query1= select field from table where field = 1;
$query2= select field from table4 where field= 4;

Insert into tmpTable ($query1,$query2)

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SubQueries Prior
Does anybody know how to rewrite the following query to run on mysql 4.0.20.
Is it possible to do this with JOINS? (I don't really have to join 2 tables...
SELECT *
FROM OAK_photos
WHERE cat_id = (SELECT cat_id FROM OAK_photos WHERE id=$id)
AND order_nr >= (SELECT order_nr FROM OAK_photos WHERE id=$id)
ORDER BY order_nr ASC
LIMIT 0 , 5

or should I run the 2 subqueries first as seperate queries and pass on the outcome via variables to the third query, the above main query?

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Using CONCAT In Subqueries
SELECT tblmonths.fldMonth, tblyears.fldYear, tblmonths.fldID, CONCAT(tblmonths.fldID," ", tblyears.fldYear)
FROM tblmonths, tblyears
where CONCAT(tblmonths.fldID," ", tblyears.fldYear)
NOT EXISTS
(SELECT CONCAT(fldMonth, " ", fldYear)
from tblexpensesclaims)
GROUP BY tblyears.fldYear, tblmonths.fldID

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Subqueries In The FROM Clause
I'm using 1&1 web hosting services with MySQL as database (Ver 14.12 Distrib 5.0.16, for pc-linux-gnu (i686) using readline 5.0).

When I ran an example in Chapter 13.2.8.8 from MySQL 5.0 Reference Manual:

CREATE TABLE t1 (s1 INT, s2 CHAR(5), s3 FLOAT);
INSERT INTO t1 VALUES (1,'1',1.0);
INSERT INTO t1 VALUES (2,'2',2.0);
SELECT sb1,sb2,sb3
FROM (SELECT s1 AS sb1, s2 AS sb2, s3*2 AS sb3 FROM t1) AS sb
WHERE sb1 > 1;

I always get the following error message:

ERROR 1064 (00000): You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT s1 AS sb1, s2 AS sb2, s3*2 AS sb3 FROM t1) AS sb

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Problem With Subqueries
I am trying to find the rows in table1 that do not have matching rows in table2 in order to set the value of a field in table1. I can get a query to return the rows that do have matches with this query:

select item1 from table1 where item1 in (select item2 from table2);

However, the following queries return no data:

select item1 from table1 where not(item1 in (select item2 from table2));
select item1 from table 1 where item1 <> all(select item2 from table2);

My understanding of the first query is that the not operation would be applied after evaluating whether item was in the result of the subquery. With the second query, I thought it should return true if item is not equal to every result in the subquery. If I try to use a left join and then simply find the rows that have a null value coming from table2, I get the correct resultset but I can't use that as a subquery for my update statement. Since table1 is what is being updated MySQL tells me that table1 cannot be used in the subquery for the update statement. I have this working in a stored procedure by importing the result of the join into a temporary table, but I'd rather not have to write all that data and then delete it.

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Can I Do Subqueries With MySQL?
I wanted to know how can I do subqueries with MySQL?

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Slow Subqueries
I know (by internet) that mySQL is very fast. Problem is that my subqueries that are very fast in Access or SQL Server but they are very slowly in mySQL - since I have to restart my computer because mySQL freeze all the processes. (the resources where used at maximum - 2 Gb RAM, 2,5 Ghz processor)

This is the query :
SELECT NPL, PP FROM P_A INNER JOIN ACTIONS
ON P_A.NA =ACTIONS.ACT_N WHERE P_A.NA in
(SELECT NA FROM P_A WHERE NP ='ABC')

P_A has 5 columns and 12000 rows
Actions has 5 columns and 770 rows

Any suggestions ?

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Column Subqueries
to the best of my knowledge, a column subquery is a single column resultset with many rows, i'm assuming joined by some previous column / row value.

can anyone show me a column subquery, manybe even a multiple column subquery, with a very small discussion on what they did and what it would return?

I'm looking to return a query like username, company name, company location, application, application role, application persission where I do not get the "normal" repetitive SQL resultset.

note: column subqueries may not be my direct answer but I still wanted to see what column subqueries was all about.

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Subqueries In MySQL 4.0?
I've got the following query. I just found out that subqueries are not supported by MySQL 4.0...

How would I replicate this to work with MySQL 4.0?

SELECT DISTINCT CategoryID, tblCategory.Category FROM tblCategory INNER JOIN
(SELECT Cat FROM ( SELECT tblCategory.Category AS Cat FROM tblEntries)
UNION SELECT Cat FROM ( SELECT Category2 AS Cat FROM tblEntries) UNION
SELECT Cat FROM ( SELECT Category3 AS Cat FROM tblEntries)) As A ON
tblCategory.CategoryID = A.Cat;

Table tblCategory
CategoryID = index key
Category = Text entry describing the Category

Table tblEntries
Category = key link to tblCategory
Category2 = key link to tblCategory
Category3 = key link to tblCategory

Basically, I want a list of Categories that are used in tblEntries.

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Subqueries To Mysql 3.x.x
I know that mysql 3.x.x does not support subqueries so i need your help with a query..

I need to make possible to search concurrently both fields. The user can insert only part of the word that is searching so i used the like '% keyword %'. in musql queries

Now my tables are
Table Titles:
Title (mediumtext)
AuID (integer)

Table Authors:
Author (mediumtext)
Au_ID (integer)

If i had support for subqueries then i would have done it easily

select Title from Titles where Title LIKE '%user title entry%' and AuID= (select AuID from Authors where Author LIKE '%User author entry%')

Now i don't have support for subqueries i need help for writing this query.

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Queries And Subqueries
SELECT COUNT(t.id) AS tuttotal, (SELECT COUNT(t.id) FROM tutorials AS t WHERE t.status = 1) AS pendtotal, (SELECT COUNT(r.id) FROM reports AS r) AS reptotal FROM tutorials AS t
If I input that SQL into mysql it returns exactly what I'm after. And on my development server it works as expected.

However on my production server I am getting an error when I try it in PHP;

You have an error in your SQL syntax near 'SELECT COUNT(t.id) FROM tutorials AS t WHERE t.status = 1) AS pendtotal, (SELECT' at line 1

I think it might be that my server is running an earlier version of MySQL, 3.23.28 I believe.

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SELECT .. WHERE .. Subqueries ?? Is It Possible?
I have a page which will send over three possible query's to the other page, but the page receiving the query's will only ever execute one..

gal/event/date
gal/venue/date
gal/event/venue/date

I need the page receiving this data to be able to handle what ever gets passed over..

I currently have:

SELECT photo_id, DATE_FORMAT(date, '%d%m%y') AS subdir, views, caption FROM photos WHERE venue_id='$venue_id' AND date='$date'"
which deals with 'gal/venue/date' from above, but how can I structure the SELECT and WHERE so I can have them all covered but in the one SELECT statement?

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Subqueries And LIMITs...
I want to display a subset of data from another query...

Basically I've got 3 tables which are all joined together in a query...

Lets say I have 300 results rows displayed from that query. Is there a way I can then limit those results without effecting the original query (I still need to be able to pull all the results as well)

I've tried (and it didn't work)...

Quote:

SELECT * FROM products, manufacturers, brands
WHERE

(SELECT stock_code FROM products, manufacturers, brands

WHERE

(manufacturers.manufacturer_id = brands.house_id) AND
(products.brand_id = brands.brand_id)

ORDER BY

manufacturers.manufacturer_name,
brands.brand_name,
products.stock_code)

LIMIT 0 , 10

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Does MySQL (4.0.20-standard) Allow Subqueries
Im moving a development app (MySQL 5.0) to a different server which
runs MySQL 4.0.20-standard. I am getting errors on queries that have
subqueries such as...

SELECT id
FROM table1
WHERE id IN (
SELECT id FROM table1
)

Seems like such a simple query but it wont run? Anybody know the
answer and what other limitations im going to experience going from
version 5.0 down to 4.0.20-standard.

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Does MySQL (4.0.20-standard) Allow Subqueries???
Im moving a development app (MySQL 5.0) to a different server which runs MySQL 4.0.20-standard. I am getting errors on queries that have subqueries such as...

SELECT id
FROM table1
WHERE id IN (
SELECT id FROM table1
)

Seems like such a simple query but it wont run? Anybody know the answer and what other limitations im going to experience going from version 5.0 down to 4.0.20-standard.

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Having Trouble With Subqueries With Mysql 4.0.21
i'm trying to make this command run:

select MAID from spez_MA where MAID = any(select MAID from spez_P_MA where P_ID = 1)

on a mysql server 4.0.21. and i get an error

#1064 - You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near '( select MAID from spez_P_MA where P_ID = 1 )
LIMIT 0, 30' at

the command works using the same database in another mashine running mysql 4.1.22.

where can i find the documentation of the correct syntax for 4.0.21? my sintax is according with http://dev.mysql.com/doc/refman/4.1/en/any-in-some-subqueries.html, but this is for 4.1, not for 4.0. this manual should be for versions 3.23 and 4.0 too.

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JOIN Versus Subqueries
I'm always looking to expand my skills and knowledge, and as such I'm currently working on rewriting several of my old apps that make atrocious abuses of MySQL queries. I've pounded out several of them into single statements using subqueries, but on this forum I've noticed very little subquerying and a lot of JOINing.

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Subqueries And DISTINCT From MySQL 5 To 4
Ugh... been working on a project for some time now and I'm just plain stuck and the SQL is getting over my head. I would LOVE any help you can give me. The following query works beautifully fast on my in house machine (mySQL 5) but when I brought it over to the live server (mySQL 4.1) the query takes about 30 seconds to compile... I realize I am not a SQL rock god...

SELECT DISTINCT p.pailid AS PID, p . * , (

SELECT COUNT( * ) AS c
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SELECT COUNT( * ) AS q
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AND f.display =1
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Subqueries :: #1064 - You Have An Error In Your SQL Syntax.
I'm famililar with other DB systems, but for some reason am having a problem with the simplest of queries.....

SELECT *
FROM table1
WHERE famc NOT
IN (
SELECT familyID
FROM table2
)

Why isn't this working?? I'm on version 4.0.25 something....I get

#1064 - You have an error in your SQL syntax. Check the manual that
corresponds to your MySQL server version for the right syntax to use
near..............

According to mysql docs it's supposed to work....
http://dev.mysql.com/doc/refman/4.1...subqueries.html

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Pull Related Info Using Subqueries
I'm creating a tool to browse a database of movie listings. The browser
pulls up 25 results at a time, and you can page through them using 'Next'
and 'Prev' tools. Pretty basic stuff.

Here are my tables:
movies
directors
comments
movies_directors
movies_comments
etc...
(primary key is movies.id)

But here's where I'm stuck: for each film, I need to pull the movie info in
'movies', plus any related data from other tables, like this:

The Lord of the Rings | Peter Jackson | 3 comments
Episode II | George Lucas | 0 comments
Indiana Jones | Steven Spielberg | 15 comments

I seem to run into problems when I try to join info from all of these
related tables. If there's a match, great. But, if not (like a movie with no
comments), the movie is excluded from the result set.

I've tried all sorts of SQL queries to make this work, but nothing seems to
do the trick.

SO, HERE'S MY QUESTION, IS THERE ANY WAY TO DO THIS QUERY WITHOUT
SUBQUERIES/MYSQL 4.0? Or would the best approach be to use PHP to do all the
subquery lookups?

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Reasonable Delete Alternative To Subqueries?
I'd like to do something like:

delete from a where id in (select * from b where pattern like
'%something%')

I may or may not have the syntax right. I know that this sort of
subquery isn't available until mysql 4.1. 4.1 beta is taking too long
to release and I need something now, so here's what I'm doing now:

replace a (id) select -refId id from b where pattern like
'%something%'

So I'm marking/flagging the rows that will need to be deleted. Next,
I delete them:

delete from a where id < 0

I've tested this, and it actually works. id is a primary key btw.
good or not good?

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Reasonable Delete Alternative To Subqueries
I'd like to do something like:

delete from a where id in (select * from b where pattern like
'%something%')

I may or may not have the syntax right. I know that this sort of
subquery isn't available until mysql 4.1. 4.1 beta is taking too long
to release and I need something now, so here's what I'm doing now:

replace a (id) select -refId id from b where pattern like
'%something%'

So I'm marking/flagging the rows that will need to be deleted. Next,
I delete them:

delete from a where id < 0

I've tested this, and it actually works. id is a primary key btw.

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Question Relating To Joins And Maybe Subqueries.
I'm just experimenting with a bit of a different aproach to db design than what I have done in the past. The idea is that I have a "base" table that contains data like datetime_modified, user_id, tags, category etc. It also contains a pin column for attaching one rows referance to another.

Below is a much simplified representation of what I have created.

(gid stands for global id )

PHP

CREATE TABLE `base` (   `gid` int(11) unsigned NOT NULL auto_increment, ...   `category`int(11) unsigned default NULL,   `pin`int(11) unsigned default NULL,   PRIMARY KEY  (`gid`) ) CREATE TABLE `items` (    `pid`int(11) unsigned NOT NULL auto_increment,   `gid`int(11) unsigned NOT NULL,  ...    `title`varchar(64) collate latin1_general_ci NOT NULL,   PRIMARY KEY  (`pid`)  ) CREATE TABLE `item_packages` (    `pid`int(11) unsigned NOT NULL auto_increment,    `gid`int(11) unsigned NOT NULL,    `pgk_selection`varchar(64) collate latin1_general_ci NOT NULL,    `pkg_quantity`tinyint(1) unsigned default NULL,    PRIMARY KEY  (`gid`)  )


At the moment I have also an item_variations table and I use the pin column to attach the variations to their root items no worries. However I would also like to take it a little further.

So I would like to select items based on their category and if present also add the package data.

So I can select the items based on their category located in the base table no worries, but am having trouble adding the packages data to the query.

So I have selected the items based on category like this:

PHP

SELECT items.*             FROM base             LEFT JOIN items ON items.gid = base.gid             WHERE base.category = $cat_gid


I'm thinking a subquery may be needed to add packages?

I would be much appreciative of any assistance. I'm still trying to get to grips with joins and subqueries. At the moment my main problem seems to be that I'm always getting errors that columns don't exist.

BTW at the moment I'm doing a dodgy and using php to run another query for packages and push them onto the first result set.

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Mysql Subqueries / Multiple Selects?
In MSSQL I can use subqueries to return a bunch of independant data with a single query. I am wondering if mysql has the same ability. I'm using > mysql 4.1, but I haven't seen any examples of this being used.

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Moving Data Between Tables - Subqueries
I'm hitting a wall writing these SQL queries..

I have two tables that i'm interested in with the listed columns
Sub_menu_itemsub_menu_idcontent
Itemsite_idmenu_idsub_menu_idcontent
I need a query that will copy Item.content into Sub_menu_item.content IF Item.site_id > 0 AND Item.menu_id > 0 AND Item.sub_menu_id > 0

Here's what i've come up with so far:

SQL
UPDATE Sub_menu_itemSET Sub_menu_item.content = Item.contentWHERE Sub_menu_item.sub_menu_id = Item.sub_menu_idAND sub_menu_id IN (SELECT sub_menu_idFROM ItemWHERE site_id > 0 AND menu_id > 0 AND sub_menu_id > 0);

lil'

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Emulating Subqueries With Temp Tables In MySQL 3.23.55
I just found out that the server I'm writing some code for only has MySQL 3.23.55 which unfortunately doesn't support subqueries (and dumb me I spent so much time trying to make them work thinking it was a syntax problem).

So, I gotta find another way around.

I think temporary tables are the way to go, but I can't find enough examples to put beside the manual to full understand them. Any pointer to some resources
about this?

Specifically what I have are two tables:

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Most Recent Results, Without Using Subqueries Or Temp Tables.
I have a table whose schema is essentially as follows:

Results(name varchar(20), version varchar(20), configuration varchar(20), status varchar(20), datetime timestamp(14))

Essentially, what I would like to accomplish is to get the most recent record for name, and also for the combination of name and version.

I'm using MySQL 4.0.12 and therefore do not have access to subqueries, and would like to avoid using a temp table, which I am doing right now with limited success and considerable overhead.

I've also tried using a group by statement and using max(datetime) to get the most recent timestamp, but I end up getting the right timestamp, but the incorrect values in all of the other columns.

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Selecting Data From Single Table... Subqueries
I have a table with a list of books, their genres (type), and price. I have attached it as an image.

I would like to select all books whose price is higher than all books of type HOR. Basically, I think that this means: find the book of type HOR that is the most expensive. Then, select all other books whose price is greater than that.

In this example, the most expensive HOR book is 19.60. Therefore, I need to select all books with price > 19.60 and not of type HOR.

I tried using a subquery like this:


SELECT * FROM BOOK WHERE PRICE > (SELECT MAX(PRICE) FROM BOOK WHERE TYPE='HOR' GROUP BY TYPE)
However, I get an error that says:

Quote:

#1064 - You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT MAX( PRICE ) WHERE TYPE = 'HOR' GROUP BY TYPE )
LIMIT

I looked up that error in the mysql doc but it didn't have much info in there:

Quote:

Error: 1064 SQLSTATE: 42000 (ER_PARSE_ERROR)
Message: %s near '%s' at line %d

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