Tag Archives: T-SQL
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Error message: http://System.Data.SqlClient.SqlException (0x80131904): Conversion failed when converting the varchar value ‘NULL’ to data type int.
7December 5, 2019 by Kenneth Fisher
I love this error. Primarily because it demonstrates two very important things. Errors matter. Make sure when you ask someone …
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The curious case of CHAR(0)
10November 14, 2019 by Kenneth Fisher
Over the years I’ve seen quite a few strange things with SQL Server. This one may not have been the …
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SQL Homework – October 2019 – Code review (self and peer)
Leave a commentOctober 2, 2019 by Kenneth Fisher
Every database person I’ve ever met writes at least some code at some point in their career. That code might …
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When were the statistics last updated and how many rows were sampled?
Leave a commentSeptember 4, 2019 by Kenneth Fisher
TL;DR; Final query is at the bottom. Every now and again (particularly when someone is having performance problems) I’ll get …
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Setting Trigger Order
Leave a commentAugust 26, 2019 by Kenneth Fisher
If you can help it you probably shouldn’t be using triggers. But if you have to use a trigger you …
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Why do DBAs dislike loops?
5August 22, 2019 by Kenneth Fisher
If you started out as a developer you were probably taught how important loops are. They are one of the …
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Temporary stored procedures
Leave a commentAugust 7, 2019 by Kenneth Fisher
tl;dr; Temporary stored procedures are excellent for testing pieces of code that are going to go into (or come from) …
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Optional vs Required parameters in Stored Procedures
7July 29, 2019 by Kenneth Fisher
If you are executing a stored procedure with a bunch of parameters it can be a bit of a pain …
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Short circuiting an AND
4July 15, 2019 by Kenneth Fisher
The other day I did a post on how an OR short circuits. It was a somewhat unusual type of …
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What permissions do temp stored procedures use?
4June 19, 2019 by Kenneth Fisher
In a performance tuning class I recently took with Brent Ozar (b/t) he mentioned temporary stored procedures and an interesting …
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