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infinite loop

Infinite Loop – SQL in Sixty Seconds #144

December 2, 2020
Pinal Dave
SQL Video
SQL in Sixty Seconds, SQL Scripts, SQL Server

Lots of people wrote feedback about it and wanted me to explain in this video so I have built this new Video where I discuss Infinite Loop.

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A relined cabinet remains distinct from drawers that retain their earlier linings.

SQL SERVER – Change Database and Table Collation

December 1, 2020
Pinal Dave
SQL Tips and Tricks
SQL Collation, SQL Scripts, SQL Server

To Change Database collation, I separate its default from existing character-column settings. The customer moved from case-insensitive to case-sensitive behavior.

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Gouache painting of a water wheel at a stream mill with a single vermilion bucket among gray ones

WHILE 1 = 1 Loop in T-SQL: Run Forever, Stop Safely

November 30, 2020
Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Scripts, SQL Server

A WHILE 1 = 1 loop never ends on its own, so every one needs a planned exit. This post builds a once-a-second sampler with three ways out, a stop flag, a round limit and a time limit, then shows how to stop a loop from a second window and what the recursion limit does.

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Gouache painting of a short train with green carriages and a dark vermilion wagon at the front running along a track at dusk

JOIN Elimination in SQL Server: When a Table Drops Out

November 25, 2020
Pinal Dave
SQL Performance
Execution Plan, SQL Joins, SQL Scripts, SQL Statistics

JOIN elimination removes a joined table from the plan when the query does not need it. This post proves it with STATISTICS IO, then tests nine variations to show when it applies and when it does not, including a foreign key that has lost its trust.

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A local doorway is inspected separately from the longer route beyond the courtyard.

SQL SERVER – Database Engine TCP Port and Browser UDP Port

November 24, 2020
Pinal Dave
SQL Tips and Tricks
Computer Network, SQL Scripts, SQL Server

I inspect TCP listeners to find the actual Network port in use. A customer wanted a query rather than an assumption.

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Three vessels retain a supplied tag, an older tag and an empty tag loop.

SQL SERVER – Capturing INSERT Timestamp in Table

November 23, 2020
Pinal Dave
SQL Tips and Tricks
SQL Constraint and Keys, SQL DateTime, SQL Scripts, SQL Server

A default can insert timestamp values when the caller omits a datetime column. I use a session-local CURRENT_TIMESTAMP example.

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Repeated source tiles sit beside a distinct selection tray and a separate two-tile jig.

SQL SERVER – Logical Processing Order of the SELECT Statement

November 18, 2020
Pinal Dave
SQL Tips and Tricks
SQL Operator, SQL Performance, SQL Scripts, SQL Server

Logical Processing places DISTINCT before TOP in a SELECT statement. Questions after my video prompted this explanation.

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