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A string of dried chili peppers hung in order from smallest to largest, hands adding one fresh red pepper in place.

Ordered Comma Lists With STRING_AGG and WITHIN GROUP

September 18, 2009
Pinal Dave
SQL Tips and Tricks
SQL Function, SQL NULL, SQL Server, SQL String

Build ordered comma lists with STRING_AGG and WITHIN GROUP, remove duplicates, handle nulls, and avoid fixed-length result limits.

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SQL SERVER - Converting Stored Procedure into Table Valued Function

SQL SERVER – Converting Stored Procedure into Table Valued Function

September 17, 2009
Pinal Dave
SQL Performance
SQL Function, SQL Stored Procedure

Not every stored procedure should become a Table Valued Function. Here is which kind of SP qualifies, mainly one whose output you insert into another table.

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Bees crowding one narrow entrance of a wooden beehive while a second opening on the side stays almost empty.

High-Frequency Inserts Without Blocking

September 16, 2009
Pinal Dave
SQL Performance
SQL Index, SQL Lock, SQL Server, SQL Wait Stats, Transaction Log

High-frequency inserts can stall on the log, indexes, or last-page contention; learn to diagnose the wait and choose targeted SQL Server fixes.

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SQL SERVER - Cryptography in SQL Server 2008

SQL SERVER – Cryptography in SQL Server 2008

September 15, 2009
Pinal Dave
SQL Tips and Tricks
SQL Server Security

A brief look at cryptography in SQL Server 2005 and 2008: why encryption belongs at the engine level, its effect on performance, and authentication basics.

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SQL SERVER - Plan Caching and Schema Change - An Interesting Observation

SQL SERVER – Plan Caching and Schema Change – An Interesting Observation

September 14, 2009
Pinal Dave
SQL Tips and Tricks
SQL Cache, SQL Documentation, SQL Profiler, SQL Scripts, SQL Server Management Studio, SQL Stored Procedure, SQL Utility, SQL White Papers

What counts as a schema change for plan caching? More than table structure: adding or dropping an index also qualifies, per Greg Low’s white paper.

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A cream jar and shallow bowl sit beside a slate-blue triangular panel, a looping sage cord and a small red bead.

geometry STDimension: Count Dimensions, Not Points

September 13, 2009
Pinal Dave
SQL Tips and Tricks
SQL Datatype, SQL Function, SQL Scripts, SQL Server

geometry STDimension describes dimensionality rather than the number of coordinates. A mixed collection reports its highest-dimensional element.

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A faded rowing boat on a lakeshore with leaves in the hull and a freshly coiled, still wet mooring rope

Finding Databases Nobody Uses

September 12, 2009
Pinal Dave
SQL Tips and Tricks
DBA, SQL Data Storage, SQL DMV, SQL Server

Finding databases nobody uses requires index activity, connection samples, job searches, and owner evidence before an offline trial.

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