Phil Factor sets out with the modest aim of giving you enough of an introduction to waits to better understand the wait information you get from a SQL Server monitoring tool like SQL Monitor, and the rather overwhelming amount of information available in the underlying DMVs and Extended Events.
2020-09-07
Filters are used by Redgate's SQL Compare, SQL Source Control, DLM Dashboard, and SQL Change Automation. A typical use for a filter is to work on just one schema within a database or just a limited set of tables and routines. You would also want to use a filter to exclude certain object, such as database users, from comparisons. Phil Factor explains how they work, and how to create, edit and then use them within the various Redgate tools.
2020-09-02
Starting out a new database development with source control is relatively easy. To introduce source control into an existing database application can be more challenging. Phil Factor explains some of the fundamental steps.
2020-08-28
In Redgate Change Control v3.0, you can now commit your database changes to your local Git repository and collaborate with your team by pushing and pulling changes from the remote Git repository. If you’re using branches, you can also create and switch Git branches from within Redgate Change Control.
2020-08-24
The latest version of SQL Change Automation now integrates with SQL Clone to let you use a snapshot of your database’s schema as a baseline. This simplifies migration development in complex databases, avoiding problems like invalid objects or circular dependencies, and you can verify migration scripts on a copy of the currently released database.
2020-08-20
Phil Factor provides a PowerShell script to disconnect your laptop without risking error 21, if you're working with SQL Clone and need to go offline. The same script will then bring the clone database back online smoothly, once you're reconnected.
2019-05-22
Many production databases have failed embarrassingly as a result of INSERT code that omits a column list, usually in mysterious ways and often without generating errors. Phil Factor demonstrates the problem, and advocates a 'defense-in-depth' approach to writing SQL, in order to avoid it.
2019-05-22
Grant Fritchey shows how to provision a group of interdependent databases, masked to protect sensitive or personal data, to each machine in an Azure-based test cell.
The post How to...
2019-05-15
If Prompt warns you of use of the asterisk, or 'star' (*), in SELECT statements, consider replacing it with an explicit column list. It will prevent unnecessary network load and query performance problems, and avoid problems if the column order changes, when inserting into a table.
2019-05-14
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Phil Factor demonstrates how to use SQL Clone to create 'disposable' SQL Server databases, for development and testing work. You can spin up a clone, use it to unit test your code, messing up the clone in the process, then reset the clone in seconds, ready for the next test.
2019-05-14
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I have two calls to the GENERATE_SERIES TVF in this code:
SELECT TOP 10 gs.value FROM GENERATE_SERIES(1, 10) AS gs ORDER BY NEWID () OPTION (RECOMPILE); go DECLARE @a int = 10; SELECT TOP (@a) gs.value FROM GENERATE_SERIES(1, @a) AS gs ORDER BY NEWID () OPTION (RECOMPILE);In the actual query plans, what is the estimated number of rows for each batch in SQL Server 2022? See possible answers