Question

I need to be able to add a set of values into a table every time a new user is added into my system.

When the user is added, I want to look into my ‘Tags’ table, and insert a new entry into the ‘Tag_Score’ table for each of the IDs in the ‘Tags’ table.

I tried the following based on something i found online but although the logic seems sound, it doesn’t seem to be working

DECLARE @LoopVar INTEGER
SET @LoopVar = ( SELECT MIN(Tag_Score.T_ID) 
FROM Tags ) WHILE @LoopVar IS NOT NULL 
BEGIN 
INSERT INTO  `a3360218_DD`.`Tag_Score` (
`A_ID` ,
`T_ID` ,
`Score` ,
`Visits`
)
VALUES (
'" . $accountID . "', @LoopVar ,  '0',  '0'
)
SET @LoopVar = ( SELECT MIN(Tag_Score.T_ID) 
FROM TheTable
WHERE @LoopVar < T_ID ) 
END

The error given is:

#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 'WHILE @LoopVar IS NOT NULL 
BEGIN 
INSERT INTO  `a3360218_DD`.`Tag_Score` (

' at line 2 

Thanks in advance

Matt

Answer 1

You haven’t posted any table layouts, so I’m shooting in the dark here, but this kind of query should work for you:

INSERT INTO Tag_Score (A_ID, T_ID, Score, Visits)
SELECT A_ID, T_ID, 0,  0
FROM Tags
WHERE A_ID = $accountID;

Note the removal of all those unnecessary back-ticks (ie `) that are only necessary when you have a schema name that is a reserved word, and look how readable it is now!

Keep things simple – avoid complex SQL if you can.