T-SQL

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Picking the ON or WHERE Clause for the SQL Predicate

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Helping people solve T-SQL problems is one of my favorite hobbies. Someone messaged me the other day with a complex query that was almost complete except for one issue. He needed to perform a LEFT OUTER JOIN but had to filter based on a value from the right table. However, when he added the filter, SQL removed rows from the left table. The task was to decide where to place the SQL predicate: in the ON or WHERE clause.

2025-09-01

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Changing the AG Listener

In SQL Server 2025, if I want to remove an IP from a listener, what do I do?

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