MYSQL :: Rows Returned

Zero Rows Or One Rows Returned, Same Data And Same Query
I have a query that produces a single row (as I expect) when I run it from the mysql client (mysql 4.0.18-Max/linux, also 5.0.19-standard/OSX-intel), or from sqlgrinder (osx, uses jdbc).

When I run it inside my application (a Java app connecting via jdbc), I get zero rows from this query.

I tried it under phpmyadmin, and once again I get zero rows.

Why do I get inconsistent results? Here's the query:

How To Get Count Of Rows Returned While Using Group & Having?
i'm using the having keyword to find certain set of rows and they are working properly.

but what i want is , i want to count the total number of rows returned by this query using mysql.

select name,count(date) from emp group by date having count(date)>3;
this returned returns all the names that have more that 3 entries in the same date. it returned 5 rows and how can i get the count of rows(5) the query returned .

Limiting Amount Of Returned Rows?
How do I limit the amount of returned rows?

Lets say, that I want only the latest 400 rows (of e.g. 4034634 rows) -
is there a parameter for that like rownum in Oracle?

e.g. select * from someplace where rownum < 400 order by sometimefield?

Count Number Of Rows Returned?
this is my connect and everything code:

<?php // connect to the mysql database server.
mysql_connect ($dbhost, $dbusername, $dbuserpass);
mysql_select_db($dbname) or die(mysql_error());
$query = "SELECT DISTINCT category FROM $tuttable";
$result = mysql_query($query) or die(mysql_error());
while ($row = mysql_fetch_array($result))
{
echo ($row['category']." | ");
}
echo count($row);
?>

Notice "echo count($row);" How do i get this to work properly. It only returns one, because there is only 1 that it is working on. I want to return the count of all the rows that fit that query.

Counting Number Of Rows Returned
I want to count the number of rows returned when I execute an SQL query. At the moment I am selecting them all and cycling through them:

$count=0;
$query = "SELECT * FROM swe_picgal WHERE cat="".$cat.""";
if ($mysql_result = mysql_query($query, $linkdb)) {
if (ExecuteQuery($linkdb, $result, $query)) {
while ($row = NextRow($result)) {
$count++;
}}}
print('Number of rows: '.$count.'');

Surely there is an easier way? I assumer mySQL will have a built in counting function?

MySQL Browser - Rows Returned In
Can anybody tell me what the "rows returned in" numbers at the bottom left of the results window signify, especially the one in ()? I have searched the docs to no avail!

Unions -- Number Of Rows Returned
I have this query:

SELECTcount(*)
FROMpa_album
WHEREcreator_id = 1001
UNION
SELECTcount(*)
FROMmb_post_tbl
WHEREauthor_id = 1001
UNION
SELECTcount(*)
FROMmb_post_tbl
WHEREupdated_person_id = 1001
UNION
SELECTcount(*)
FROMmb_thread_tbl
WHEREauthor_id = 1001
UNION
SELECTcount(*)
FROMevent_tbl
WHEREcreator_id = 1001

Which checks for a specific value in the foreign keys of a few tables. I would expect to see 5 rows in the results of this query, but I do not get 5-- I get a row for each SELECT that has a count > 0, but then I get only one row returned for all tables that have a count = 0. So if there is only one table that has a count > 0, then I get two rows-- value 0, and value 1.

Limiting # Of Rows Returned Per Page...
I'm building a db in MySQL using PHP, and I need to limit the number of results per page returned in a query. Note, I don't want to limit the query, just the number of results shown per page. So, if 100 rows are returned, I want to show 20 per page, and have the others linked at the bottom, like:

Page: 1 2 3 4 5 etc.

I did a search of the forum, but only found references to the LIMIT clause. This doesn't seem to be what I need, as I don't want to limit the number of rows returned in a query, just how the results are display. So I'm not sure if this would be done with SQL, or PHP.

Limiting Rows Returned Based On Count
say if I have 3000 records in my db, and I want to get rows 200~300 when orderd by a specific field in this table, is there a easy way to do it?

I have something like:

select * from table_name order by ID desc limit ....

but I am not sure if this syntax allows me to do what I am trying to do .

Limit Number Of Rows Or Characters Returned In A Text Field
I understand you can limit the rows of a recordset, but can you somehow tell a query to limit the rows (or characters) returned within just a text field?

I have a page that returns abstracts of many articles and I want to truncate the description for each to just 200 characters. Is there a way to accomplish this with MySQL?

Multiple Rows Returned Instead Of One (was "why This Is Happening?")

I have this select statement

PHP

$select="select video.id, title, description from video, category,

maincategory where maincategory.mainid='$selectcategory' AND

maincategory.mainid=category.mainid and

video.categoryid=category.categoryid and video.title like '%$searchterm%'

or video.description like '%$searchterm%' order by dateadded DESC";

if i put car in the searchterm which is the name of a video.title everything works fine and the result is shown only once... whereas if i put blabla in the searchterm which is included in the description of video.description two rows r returned for the same result instead of one.... why???

Datas Not Being Returned
Starting recently, when i try to retreive reslults from a table in my database, it won't return rows that i recently inserted. so i looked in the mysql folder in my webserver and opened the data files, and i noticed the rows i inserted are there, they just arent beign returned by my SELECT queries through PHP and the mysql.exe command line. here is (if it helps) the command i used to create the table so you can see its design:

CREATE TABLE postednews (
postednews_id MEDIUMINT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
newstitle VARCHAR(225) NOT NULL,
newscontent TEXT NOT NULL,
dateposted TIMESTAMP NOT NULL,
PRIMARY KEY(postednews_id) )

Returned 100 Records
I'm also using HTML & PHP for this. I have a query which returns 100 records. Fine. Now I would like to list 10 records per page. How do I go about this? I can list them all, but what I was looking for is pages of 10. I guess what I'm looking for is a pointer. Is there such a thing? Would love to have a NEXT & PREV buttons working.

MySQL Returned
I was trying to make an update on a table an I got this message:
# MySQL returned an empty result set (i.e. zero rows)

I had to make the update manually. ¿Could anybody explain me the causes of this message, please?

Row Index In The Returned Result Set?
suppose table t has three rows, such that "select letter from t" returns

A
B
C

Is there a way to to return the row index of the record returned in the result set such that we get ("select row(), letter from t" possibly) ?

1 A
2 B
3 C

Shortening Date Returned
I have a date table, but in the resulting webpage only want to show the month and year, not the full YYYY-MM-DD format.

Request Returned With Sql_error
iam useing windows 2000 pro as server,i install mysql 5.0,
can use window 2000 pro as mainserver for mysql 5.0?
when i create dsn
[MySQL][ODBC 3.51 Driver]Unknown MySQL server host 'ss' (11001)
i cant connect mysql

Limiting Results Returned
can someone show the correct sql to query a db so it will return say ...the first 50 records...then the next 50 records and so on?
I have tried different combination of LIMIT x,x with no success...

Limiting The Number Of Letters Returned
I wrote some code to return the last 5 posts from my messageboard. I want to return only 25 characters per post. Here's my code:

Ordering The Returned Tables - Not Where Clause
What I am seeking is soemthing similar to the follow

SELECT * FROM table
SELECT FirstName,* FROM table

The reason I ask why is because while fiddling with SQL server on a web job (I use MySQL way more then SQL server - so it was neat to get a go at playing around with SQL server for the first time)

I could return certain rows first by calling their column name and comma and then *

Is that possible in MySQL?

Kind Of Object Is Returned By Mysql_fetch_object()
What is the object returned by a call to mysql_fetch_object()? Is it an
array, a class, what? I know I can access fields from the result object
using the "->" operator, but how can I programmatically get a list of the
field names?

Restricting Number Of Characters Returned
is there a way to restrict the number of characters that are returned for a column. if I have a column and there are 400 characters for a particular record, and all I want to return is 50.

Echo To Text Box - Only First Word Returned
I'm echoing values from a db to text boxes, but only the first words are returned. The db field is set to varchar(255). Can someone please tell me how to solve this small but annoying problem? Thanks. By the way, I don't have any regular expressions or that kind of coding: I don't understand them :p.

Trouble Understanding Returned Resource Logic
I am unable to access a resource using "mysql_fetch_row". There is a resource present after executing a query, I've verified this. The results of "mysql_num_fields" is 2 (which is correct there are two columns in the table) and the results of "mysql_num_rows" is 0. Now how can that be? No rows yet two fields. With zero rows, my "mysql_fetch_row" function will not work. So, what's up with this? Any comments or ideas?

Grouping For A Query And Limiting Returned Data In Order Of IN()
I'm trying to pull some data from the database in which it's supposed to return 3 rows from each f.forumid in the order in which i have the forumids, however it seems to be returning all the data from the table, what am i doing wrong?

PHP Code:

SELECT t.threadid, t.title, t.lastpost, t.forumid, t.open, t.replycount, t.postusername, t.postuserid, t.lastposter, t.dateline, t.views, t.firstpostid, f.title AS forumtitle, p.pagetext AS preview
    FROM thread t
    INNER JOIN forum f ON (t.forumid = f.forumid) AND t.visible = 1
    LEFT JOIN post p ON(p.postid = t.firstpostid)
    WHERE t.forumid IN(200,250,2,30,15,60,70,90)
    GROUP BY f.title, t.title
    HAVING COUNT(*) <= 3
    ORDER BY f.forumid, t.dateline DESC

Testing For An Empty Set Returned By A Nested Select Statement
For those of you following the "While Loop Within Select" thread... I've been restructuring my database to incorporate the changes. Now I've got a table of skipped stops rather than a table of stops (I need it that way for various reasons) and I need to return the schedule to the user as long as the user's stop isn't in the list of skipped stops. SO say something like:

SELECT
yada yada yada
FROM
schedule AS 's1'
WHERE
(
SELECT
skippedstop_id
FROM
skippedstops
WHERE
schedule_id=s1.schedule_id
AND
location_id=$origin
) == "EMPTY SET"

Only I have no idea how to actually test for the empty set from the nested select...

Invalid Distinct Recordset Returned On An Indexed Column
I have a table with about 1.2 million records. I have an index set on a column.

For close to two years, this query has worked perfectly fine:

SELECT DISTINCT `Mgmt_Area` as thevalue, `Mgmt_Area` as valueid from qcdata ORDER BY thevalue

Note, this is a programmatically generated query based on some user selections. This query actually is used to create a listbox. The index has 62 separate values.

This query would usually return: Code:

ADO Error - Data Provider Or Other Service Returned An E_FAIL Status.
I am passing this simple query to MySQL through ADO:

SELECT * FROM Images WHERE MasterKey=4313;
MySQL returns this result from the command line:

mysql> SELECT * FROM Images WHERE MasterKey=4943 ORDER BY OrderNo;
+---------+-------------+-----------+----------+-------------+----------------+----------+---------+------------+
| ImageID | Path | MasterKey | Comments | RotateAngle | TimeStamp | CDLetter | OrderNo | EmailByRef |
+---------+-------------+-----------+----------+-------------+----------------+----------+---------+------------+
| 28438 | C:img1.JPG | 4943 | | 0 | 20030605080500 | | 1 | 0 |
| 28439 | C:img2.JPG | 4943 | | 0 | 20030605080500 | | 2 | 0 |
| 28440 | C:img3.JPG | 4943 | | 0 | 00000000000000 | | 3 | 0 |
| 28441 | C:img4.JPG | 4943 | | 0 | 00000000000000 | | 5 | 0 |
| 28442 | C:img5.JPG | 4943 | | 0 | 00000000000000 | | 6 | 0 |
| 28443 | C:img6.JPG | 4943 | | 0 | 20030605080500 | | 7 | 0 |
| 28444 | C:img7.JPG | 4943 | | 0 | 00000000000000 | | 8 | 0 |
| 28445 | C:img8.JPG | 4943 | | 0 | 00000000000000 | | 9 | 0 |
| 28446 | C:img9.JPG | 4943 | | 0 | 00000000000000 | | 10 | 0 |
| 28447 | C:imgA.JPG | 4943 | | 0 | 00000000000000 | | 11 | 0 |
+---------+-------------+-----------+----------+-------------+----------------+----------+---------+------------+
10 rows in set (0.03 sec)
(I did change the field `Path` to make the grid a bit smaller)

When sitting on the second record, I attempt rs.MoveNext() to advance to the third row in the recordset (note that field `TimeStamp` is zeroed out). I then get an error produced by the ADO Cursor Engine with description Data provider or other service returned an E_FAIL status.

I've done other testing and it only seems to fail when a field is NULL in the next record. Setting the `TimeStamp` on the third record (`ImageID` = 28440) to a valid date allows me to use rs.MoveNext() to access that row. Also, Field `TimeStamp` is defined in the table description as allowing NULL's.

This is becoming quite frustrating. The control center and the command line return the correct records, but ADO is getting stuck.

Using DATE_FORMAT To Format Fields Returned From The LEFT JOINed Table
I am attempting to create a query that joins a table to my main table, but I would like to format the date and time fields in the joined table using DATE_FORMAT. I've done successful joins before when the all columns or fields * are selected, but I haven't created a join where you only want to return specific fields from the joined table.

Example:

"SELECT DATE_FORMAT(table_1.date_1, '%m') AS month, DATE_FORMAT(table_1.date_1, '%d') AS day, DATE_FORMAT(table_1.date_1, '%y') AS year, DATE_FORMAT(table_2.date_1, '%m') AS month2, DATE_FORMAT(table_2.date_1, '%d') AS day2, DATE_FORMAT(table_2.date_1, '%y') AS year2 FROM table_1 left join table_2 on table_1.column_a = table_2.column_a WHERE table_1.column_c = $a_variable"

This query is only returning results that match BOTH conditions, so NULL returns from table_2 are not being disregarded like they should be when using LEFT JOIN (I think). Can someone point me in the correct direction?

Want Only One Record Returned Per Post_id (was "Help With Query")
I can't figure out how to do this query. Help would be muchly appreciated!

I want to get the DISTINCT(post.post_id) but not sure how to do this.

Here is the query I have thus far but it's returning two records each with the same post_id but different cat_id's.

SELECT post.post_id, auth_alias, pc.cat_id, post_heading, DATE_FORMAT(post_created, '%M %d, %Y'), post_body FROM posting post LEFT OUTER JOIN post_cats pc ON post.post_id = pc.post_id WHERE post_status = Ƈ' ORDER BY post.post_created DESC LIMIT 0,5

Searching For Rows That Depend On Other Rows In Some Fashion...
Maybe this is a very stupid question. I'll try anayway. I'm using
MySQL 3.23.52 on RedHat 8.0.

I have a very big table (several millions of rows). Each entry
actually constitute a word in a big text. Among other fields we have
an ID for each word which represents the postition in the text. Now I
want to search for short phrases.

For example "welcome to sweden". This means i want to find all
occurences of the word "welcome" with ID x, where we have the word
"to" with ID x+1 and the word "sweden" with ID x+2. I've tried doing
this recursively with temporary tables - but a find myself hitting a
wall as i'm not allowed to refer to 2 different temporary tables in
the same query...

Resorting to another type of data strucutre, full text index etc.. is
unfortunately not an option. We only need this as an add on feature if
we can do it. We believe that indexes, data structures etc.. are near
optimal as is.

Please use my email for further conversion since I'm not a frequent
usenet reader.

Insert New Rows With Qty Values From Existing Rows
I am trying to make all my products unique in my db.
Lets say I have a row with an id, it also has all relevant details about the product and it has a quantity value of 4.
What I would like to do is take the entire row and duplicate it by the number of the quantity field.
This would result in the same product 4 times instead of one product with qty of 4.
Reason, I am going to serialise all the products so that they each have unique barcode from the id field.
I will encounter the reverse issue when running an insert statement for inputting new data, i.e. insert a new row for each item depending on its qty value??

Getting Rows That Are Related To Other Rows In The Same Table
I use a table to save a map using the following structure:

id, x, y, owner

Every occupied map filed has an owner id != 0. The owner id is = 0 for vacant fields.

now the problem:

New registered users need a vacant field on the map. Moreover the mapfields around this field need to be vacant as well! (sqrt((t1.x-t2.x)*(t1.x-t2.x)+(t1.y-t2.y)*(t1.y-t2.y)) <= 5.25)

What I need is a query that gets those fields that have vacant fields around them.

So far, all my tries to solve this problem with Joins/Suvqueries failed.

Match Rows In Table B With Rows In Table A
How do I structure a query to match rows in table B with rows in table A where column in B contains strings that contain data from column in A..

Example:

B.part = "abcdefg" matches A.part ="cde"

I cannot put literal in query.. it must be from column data..

It's easy to match rows where columns are equal, but I can't figure out how to get a match with "substring" as shown.

Converting From Many Columns/few Rows To Few Columns/many Rows
So I have a table that looks like:

Code:

char_id1234(...up to 30)
582NULL416
25739NULL12
391NULLNULLNULL

Each char_id is the primary key in another table, each numerical column value is the primary key (skill_id) in a third table, and each data value is the primay key (rank_id) in a fourth table.

I am attempting to join all four tables into a single query, but it seems impossible without converting the table to something like this:

Code:

char_idskil_idrank_id
5812
5834
58416
2517
25239
25412

Don't Select Rows That Match Both Columns But DO Select Rows That Don't Match Both
I suppose it is because it is 2:30 AM but I'm having a bit of trouble figuring out the SQL I need to write. I am usually pretty good at this. Here's what I'm having trouble with.

My app includes a Poll system built from scratch. Each question will run for one month. the month that the poll will run is kept in 2 columns in my table... runMonth and runYear.

What i'm having trouble doing is selecting the rows that don't match both the current runMonth and current runYear.

My Table...

id.............Question...........runMonth...........runYear
1..............QA...................1......................2007
2..............QB...................2......................2007
3..............QC...................3......................2007
4..............QD...................4......................2007 (current month and year)
5..............QE...................5......................2007
6..............QF...................6......................2007

I can simply get the question for the current month...

SELECT * FROM table WHERE runMonth = 4 AND runYear = 2007;
but if I try to get all others using

SELECT * FROM table WHERE runMonth != 4 AND runYear != 2007
I get an empty result set. As I should because there is nothing there that the runYear != 2007 doesn't knock out. The result set I am looking for is

id.............Question...........runMonth...........runYear
1..............QA...................1......................2007
2..............QB...................2......................2007
3..............QC...................3......................2007
*********************(remove runMonth4 and runYear 2007)
5..............QE...................5......................2007
6..............QF...................6......................2007

What am I missing?

How Many Rows?
I've a query as below, where i need to get the number of rows it produces that is the count of number of rows. Plz help .

Select * from audio left join video on (audio_sid=video_sid and audio_prgm_num=video_prgm_num) left join
pcr_info p on (audio_sid=pcr_sid and audio_prgm_num=pcr_prgm_num) right join stream s on (stream_id=audio_sid) where audio_type =
'MPEGLayer1' and isnull(video_type) group by stream_name order by stream_name

Sum Rows But The Max
I'm trying to create a query that calculates the sum of a bunch of rows then return the max (or the highest) value of those sums. So for example I have a table called imgarchives with a field called LinkBacks. I want to do SELECT SUM(LinkBacks) FROM imgarchives ORDER BY LinkBacks DESC LIMIT 0,1

The trouble with that is that I'm not looking for a sum of ALL the columns, I want to create a sum for all the archives based on BlogID. I was thinking GROUP BY might be necessary but I'm not sure how to use that with SUM(). My thoughts are:

SELECT SUM(LinkBacks) FROM imgarchives GROUP BY BlogID ORDER BY LinkBacks DESC LIMIT 0,1

That doesn't seem to work. -_- ack.

Add Of Rows
i have a table with data (time[int] und output[int]). I need a column in that the difference between the previous measurement and the current measurement is inside.

Rows Between 10 And 20
I want to select all rows between 10 and 20 from a view how can I do this?

Top N Rows
is there a way in mysql to find out the top n rows?

for example, employee names of top 3 salary holders...

First 'N' Rows Of Each
For example: Table (type, serial#), with data

('X', 1000)
('X', 1001)
('X', 1003)
('X', 1010)
('Y', 1002)
('Y', 1005)
('Y', 1011)
('Z', 1015)

How would I retrieve at most 2 rows for each type?

('X', 1000)
('X', 1001)
('Y', 1002)
('Y', 1011)
('Z', 1015)

Getting All Rows
I've two tables audio and video and need to get all the rows from two tables by joining. How do i do that.I need all the columns from both the tables. audio_sid and video_sid from both tables are same along with audio_prog_num and video_prgm_num from audio and video tables respectively.

Rows
does there exist a mysql query option that would only find rows, whert the first letter of a given varchar-column is caps?

or in other words to give a php-pendant, a mysql-query that would do about that righti within the query:
PHP Code:
if (preg_match ("/[A-Z]/", substr ($query,0,1))) { echo $given_back_row; }

Certain Rows
I am trying to extract certain rows from a database table that contains the following fields:
bookingid, bookingdate, bookingestateid, bookincustomerid, bookingconfirmed.
My SQL is:

SELECT * FROM booking WHERE bookingDate > '2005-10-16' AND bookingConfirmed !=0

I want to count the number of rows from the bookingdate (which is dynamic) until the next row where bookingconfirmed is anything other than 0. I can't work out how to do it.

50 Rows
I have a view that references another view that references some tables and views.
When I perform SELECT * FROM myView I get all rows as expected. When I perform SELECT myColumn FROM myView I only get 50 rows.
Is there any reason for this behaviour

How Many Rows
I've a query as below, where i need to get the number of rows it produces that is the count of number of rows. Plz help .

Code:

Select * from audio left join video on (audio_sid=video_sid and audio_prgm_num=video_prgm_num) left join
pcr_info p on (audio_sid=pcr_sid and audio_prgm_num=pcr_prgm_num) right join stream s on (stream_id=audio_sid) where audio_type =
'MPEGLayer1' and isnull(video_type) group by stream_name order by stream_name

Get Best Fit Of Rows
I was wondering if its possible in Mysql to pull out the rows in a table that values add up to a certain number - but making sure the best fit is achieved. For example, the table has 2 columns:
record and cost (cost being a decimal field -ignore the £ sign)
rec1 £0.50
rec2 £1.50
rec3 £0.25
rec4 £1.00

Lets say I have a cost of £5.00 I want to get the records that fits into £5.00 (having the least amount of records). So the best fit would be:
rec2, rec2, rec2, rec1

Is there a way of Mysql returning these 4 rows? Or at least just the 2 rows rec2, rec1?