How about: select sum(t1.column1 + t2.column2 +t3.column3) as Columnsum from Table1 t1 inner join Table2 t2 on t1.id=t2.id inner join Table3 t3 on t2.id=t3.id where t1.id=n group by t1.id
This is a rough cut that assumes the id value in the join exists in all three tables. If it's missing in any one of the tables, then the query will return null. If that is not okay, then you'd have to do something with outer joins...without knowing what you're trying to find it's hard to be more specific. Donna "Peter South" <[EMAIL PROTECTED]> 08/17/2006 05:05 PM To <mysql@lists.mysql.com> cc Subject Tables/sum Can anyone tell me how to add up values in different tables? For example Table1.Column1 + Table2.Column2 + Table1.Column3 Where id(row) = n Thanks Peter -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. CONFIDENTIALITY NOTICE:This email is intended solely for the person or entity to which it is addressed and may contain confidential and/or protected health information. Any duplication, dissemination, action taken in reliance upon, or other use of this information by persons or entities other than the intended recipient is prohibited and may violate applicable laws. If this email has been received in error, please notify the sender and delete the information from your system. The views expressed in this email are those of the sender and may not necessarily represent the views of IntelliCare.
