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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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 table.a, table.b 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 My MySQL version is 4.0.21 if that is part of the problem...
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Subqueries For V3.23
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Subqueries With NOT IN And <> 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
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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 both canceled and captured = N. 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 ..97 secs. I used explain command to help understand what is going on hence the indexes, but why the difference in speed?
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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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Column Subqueries
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Subqueries In MySQL 4.0?
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Subqueries And Limit
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Subqueries To Mysql 3.x.x
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Does MySQL (4.0.20-standard) Allow Subqueries
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Does MySQL (4.0.20-standard) Allow Subqueries???
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