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He is the author of three books, “High Performance SQL Server”, “SQL Server 2014 Query Tuning & Optimization” and “Inside the SQL Server Query Optimizer” and has also coauthored other books including “SQL Server 2012 Internals”.
Benjamin has also been a speaker at many SQL Server conferences and events around the world including the PASS Summit, SQL Server Connections and SQLBits.
In general you should consider the following important points, focusing in the fact that there are two kinds of statistics: index and column statistics.
1) By default, the UPDATE STATISTICS statement updates both index and column statistics.
Notice the value of the auto_created column which tells if the statistics were automatically created by the query processor.
Run the next statement to update the column statistics only.
Let me show you how these commands work with some examples using the Adventure Works database. Sales Order Detail Use the previous sys.stats query to verify that two statistics objects were created, one for the Sales Order ID column and another one for the Order Qty column (they both have names starting with _WA_Sys as shown later).2) By default, the UPDATE STATISTICS statement uses only a sample of records of the table.Using UPDATE STATISTICS WITH FULLSCAN will scan the entire table.His blog can be found at he can also be reached on twitter at @Benjamin Nevarez.SQL Server Replication provides multi-faceted data movement capabilities across SQL Server releases which has been used by customers across the globe for a large number of years.