Question

Hello to Everyone.

I have two table, for example;

TABLE Name X

________________
| id |    A    | 
|____|_________|
| 1  | 1,2,4,8 |
|____|_________|

This Query is working in another TABLE Y,

    mysql_query(" Select * from Y where id IN(1,2,4,8) ")

But this in not working,

    mysql_query(" Select * from Y where id IN(Select A from X where id=1) ")

What can I do?
Thank You.

Answer 1

A better table design would be:

table X:
--------
id int
someid int

Values in the table would be:

id  someid
--  --------
1   1
2   1
4   1
8   1

Your query could then be mysql_query(" Select * from Y where id IN(Select id from X where someid=1").

To answer your question — You appear to be querying from PHP or something similar. Using the table structure you have, you could retrieve the value from table X using mysql_query("Select A from X where id=1") and store the results in a variable. You could then execute a second query, mysql_query(" Select * from Y where id IN(" + yourVar + ") ").