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A ski boot buckle stays on the same adjustment tooth despite a small pull on its strap

The real Data Type: Seven Digits of Precision and Overflow

June 30, 2011
Pinal Dave
SQL Tips and Tricks
Mathematics, SQL Data Storage, SQL Datatype, SQL Error Messages

Four bytes look like a bargain until a total comes out wrong. Watch real round, overflow and drift, then decide when decimal is the safer pick.

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SQL SERVER - FIX - ERROR : Msg 3201, Level 16 Cannot open backup device . Operating system error 5(Access is denied.)

SQL SERVER – FIX – ERROR : Msg 3201, Level 16 Cannot open backup device . Operating system error 5(Access is denied.)

April 13, 2011
Pinal Dave
SQL Tips and Tricks
SQL Backup and Restore, SQL Data Storage, SQL Error Messages, SQL Server

Msg 3201, cannot open backup device, operating system error 5 (Access is denied). The SQL Server service account needed permission on the disk.

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Two stacks of chocolate boxes, one short and full, one twice as tall with half-empty boxes

Page Density: The Fragmentation Number That Actually Slows Scans

December 9, 2010
Pinal Dave
SQL Performance
SQL Data Storage, SQL DMV, SQL Index, SQL Server

Measure page density and fragmentation, compare scan reads around a test rebuild, and choose fill factor using workload evidence.

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Recording Table Row Counts Every Day

November 19, 2010
Pinal Dave
SQL Tips and Tricks
DBA, SQL Data Storage, SQL DMV, SQL Server Agent

Recording table row counts each day creates a useful SQL Server trend when a scheduled job, history table, and change review support it.

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A kitchen pot rack tilting because every heavy pan hangs from one end, the other end's hooks empty.

Data, Log and tempdb File Placement: Checking Where Everything Lives

September 2, 2010
Pinal Dave
SQL Tips and Tricks
DBA, Disk, SQL Data Storage, SQL TempDB, Transaction Log

Check file placement for data, logs, and tempdb, inspect volume free space, and plan a Windows file move with a verified recovery path.

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Execut Plan Index Size Unsorted.

SQL SERVER – Computed Column – PERSISTED and Storage – Part 2

August 21, 2010
Pinal Dave
SQL Performance
SQL Data Storage, SQL Scripts

Part 2 of my look at the computed column and its effect on storage, with a list of the earlier articles in the series on PERSISTED storage and performance.

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SQL SERVER - Computed Column - PERSISTED and Storage

SQL SERVER – Computed Column – PERSISTED and Storage

July 27, 2010
Pinal Dave
SQL Tips and Tricks
Computed Column, SQL Data Storage, SQL Scripts, SQL Server

How a computed column is created and why PERSISTED and storage go together: persisted columns take more space. Plus links to the whole series.

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