MySQL join problem

Posted by David on Stack Overflow See other posts from Stack Overflow or by David
Published on 2010-05-25T18:59:44Z Indexed on 2010/05/25 19:11 UTC
Read the original article Hit count: 251

Filed under:
|
|

Table1 has u_name, Table2 has u_name, u_type and u_admin

  1. Table1.u_name is unique. But neither of the 3 fields in Table2 is unique.

  2. For any value of Table1.u_name, there are 0 to many entries in Table2 that Table2.u_name equals to that value.

  3. For any value of Table1.u_name, there are 0 to 1 entries in Table2 that Table2.u_name equals to that value AND Table2.u_type='S'

What I want: Use Table1.u_name to get Table1.*, Table2.u_admin where Table1.u_name=Tabl2.u_name and Table2.u_type='S'. If there is no such entry in Table2 we still need to get Table1.*

Please help give me some hints. Thank you so much!

© Stack Overflow or respective owner

Related posts about sql

Related posts about mysql