SQL Server execution-plans-3 book cover

Free eBook: SQL Server Execution Plans, Third Edition

If a query is performing poorly, and you can't understand why, then that query's execution plan will tell you not only what data set is coming back, but also what SQL Server did, and in what order, to get that data. It will reveal how the data was retrieved, and from which tables and indexes, what types of joins were used, at what point filtering, sorting and aggregation occurred, and a whole lot more. These details will often highlight the likely source of any problem.

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Training the next generation

By Pat Wright

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Reusing Customer Specific Order Filtering Logic with CROSS APPLY and an Inline TVF (Part 4)

By Imran2629

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PostgreSQL psql Meta Commands: Databases

By Grant Fritchey

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Question of the Day

PostgreSQL psql Meta Commands: Databases

Which of the following meta commands (sometimes called backslash or slash commands) within psql will provide you with information about the databases on the cluster?

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