Re: Insert into with IF condition
Date: August 27, 2011 08:42AM
> > if 1=1 (insert into acct_table(AcctSessionId) VALUES ('test') ELSE 'false' END;
Your parens are unbalanced, so it is unclear.
IF in an expression to be inserted:
INSERT INTO tbl (col) VALUES ( IF(condition, 'this', 'that') );
Another if/then/else type of expression:
CASE condition WHEN value THEN exp WHEN value THEN exp ELSE exp END
Try to insert, but silently do nothing if a UNIQUE or PRIMARY KEY id duplicated:
INSERT IGNORE INTO tbl ...;
Again, checking keys, but turning the INSERT into an UPDATE if there is a dup:
INSERT INTO tbl ... ON DUPLICATE KEY UPDATE ...;
Conditionally do a statement:
1. Declare a "stored procedure":
CREATE PROCEDURE proc(...)...
# no insert
2. Use it:
But the best way to conditionally execute a statement is to use Perl/PHP/Java/VB/etc to do that level of control flow.
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