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NULLS, LEFT JOIN, EXISTS i NOT IN

Friday, July 4th, 2008

Kada zelimo da uporedimo dve tabele A i B, i da pokazemo koji su redovi prisutni u A, a nema ih u B (Accessov 'unmatched query'), to generalno mozemo da uradimo na nekoliko nacina. Mozemo da upotrebimo LEFT JOIN, mozemo da upotrebimo NOT IN ili NOT EXISTS. Da li su ...

Posted in Best practice, MS SQL Server, SQL | 4 Comments »

Temp tabele

Wednesday, July 2nd, 2008

Koliko puta mi se desilo da pokusam da izvrsim nesto ovako: SELECT * INTO #TempTAble FROM MyTable da bih dobio poruku Msg 2714, Level 16, State 6, Line 1 There is already an object named '#TempTable' in the database. Pokusaj da ordadim ovo: IF  Object_id('#TempTable') IS NOT NULL DROP #TempTable daje mi ovo: Msg 102 , Level ...

Posted in Best practice, MS SQL Server | No Comments »