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

SELECT GROUP_CONCAT(field_table1 SEPARATOR ',') FROM table1 into @var;

then

SELECT * FROM table2 WHERE field_table2 in(@var);

works fine for me