The advantage of the UNION ALL is that is does not perform the SELECT DISTINCT function where the UNION does.
1.www.codecollege.NET 2.http://www.interviewsguru.com 3.The Encylopedia of Web Sites 4.Blogging and Earning
What is the advantage of UNION ALL over UNION with respect to performance?
Saturday, March 12, 2011
The advantage of the UNION ALL is that is does not perform the SELECT DISTINCT function where the UNION does.
1.www.codecollege.NET 2.http://www.interviewsguru.com 3.The Encylopedia of Web Sites 4.Blogging and Earning
Subscribe to:
Post Comments (Atom)
LinkWithin
0 comments
Post a Comment