I know I have to write SUM twice, if I wish to use it in a HAVING clause (or use a derived table otherwise): SELECT id, sum(hours) AS totalhours FROM mytable GROUP BY id HAVING sum(hours) ...
Would it be possible to give a table in MySQL query multiple aliases? If so how would I do this?
I am designing a system which stores certain hash values to represent certain pieces of text for example. Each hash value can represent more than one text file. I have 4 tables being the ...
Besides attaching the debugger, is there any other differences between “(local)\Instance” and “MyLocalName\Instance”?
When using SQL Server Management Studio for SQL Server 2008 R2 connecting to a local SQL Server 2008 R2 instance (version 10.50.2500), I know that if I am using the instance name (local)\sql2008 it ...
While trying to write a query, I found out (the hard way) that SQL Server parses WHEREs in a query long before parsing the SELECTs when executing a query. The MSDN docs say that the general logical ...
I'm quite new to querying databases, I've only been doing it for about 2 weeks in the current job that I'm in and have never touched SQL prior to this. I'm working on trying to use alias names to ...
I have an SQL query whose aliases are the same as some of its subquery's aliases. For example: select * from ROOM r where ... ( select * from ROAD r ...