I want to execute multiple expressions in an if
statement within a select
statement like this:
SELECT t.id, IF ( id > 10, @var1 := t.id; @var2 := t.title, t.title ) FROM table
Is there a way to execute these two expressions @var1 := t.id; @var2 := t.title
in one if
statement?
P粉6748763852023-09-20 09:12:51
You can do this
SELECT t.id, IF ( id > 10, CONCAT(@var1 := t.id , @var2 := t.title), t.title ) FROM table1 t; SELECT @var2; SELECT @var1;
But user-defined variables are scalar values, so you can only get the last value of @var1 and @var2 that were selected, but it will not display the connected value now.
So overall, this doesn't really make sense if you have multiple rows of data.