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The Smiling DBA

Thomas LeBlanc ( MCITP 2005/2008 & MCDBA 2000) is a Senior SQL Server DBA at Turner Industries, LLC in Baton Rouge, LA. He has been in the IT field for 21 years starting as a COBOL programmer, graduating to dBase, FoxPro, Visual FoxPro, upgrading to Visual Basic versions 3-6 and even some .Net(C#). Designing and developing normalized database has become his passion. Full-time DBA work started about 9 years ago for Thomas while working at a Paper Mill in St. Francisville, LA continuing with IEM, then Amedisys. Performance tuning and reviewing database design and code was an everyday occurrence for DBAs at Amedisys. Thomas’ free time is spent helping those less fortunate and improving his relationship with his family and God.

Archives: March 2012

Execution Plans – Merge Join

The Merge Join is a Physical Operation when joining 2 sets of data that are in the same order.

There is an interesting Clustered Index in the Adventure Works database. The SaleOrderDetail table’s primary key is a combination of the SalesOrderID and SalesOrderDetailID, not just the identity field of the… Read more

0 comments, 1,292 reads

Posted in The Smiling DBA on 15 March 2012

Execution Plans – Nested Loop

The nested loop is a physical operator used to join 2 or more sets of data when the query optimizer believes this is the best plan for the query.

The following query can be run against the AdventureWorks database:

SELECT cust.CustomerID, soh.SalesOrderID
    FROM Sales.Customer cust
        INNER JOIN Sales.SalesOrderHeader… Read more

0 comments, 354 reads

Posted in The Smiling DBA on 9 March 2012