multiple values in mysql variable

Question

The following works as expected when there is a single value stored in a variable.

SET @a := \"20100630\";
SELECT * FROM wordbase WHERE verified = @a;
         


        

Answer 1

FIND_IN_SET(column to find in , string csv) is a very handy method in case you have the string list of CSV:

SET @a := "'20100630', '20100701' ";
SELECT * FROM wordbase WHERE FIND_IN_SET(verified, @a);

if your variable is also coming from query then use this to set @a

SET @a := (SELECT GROUP_CONCAT(`id`) FROM `table`);