Use FOR SYSTEM_TIME AS OF to join temporal tables at one UTC instant, compare range forms, and index the history lookup correctly.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
SQLAuthority News – Beyond Relational Interview on SQL Server 2008 Beyond Relational
Jacob Sebastian interviewed me on Beyond Relational: what the term means, and why it builds on relational databases instead of moving away from them.
Measure CPU Pressure in SQL Server with Waits and Schedulers
CPU Pressure means tasks are ready to run but every scheduler is busy, so they wait in a queue. This post reads that queue from the schedulers, compares signal waits with resource waits, checks recent CPU history and finds the queries that use the most CPU. It ends with a plain way to decide between a faster CPU, more cores and better queries.
Evaluating a New SQL Server Version in One Week
Evaluating a New SQL Server Version in one week works when you install, restore, run a real workload, compare results, and write a decision.
SQL SERVER – Introduction to Change Data Capture (CDC) in SQL Server 2008
My first article on Simple-Talk introduces Change Data Capture in SQL Server 2008, which records INSERTs, UPDATEs and DELETEs in simple relational change tables.
SUM DISTINCT: Equal Amounts Are Not Duplicate Rows
SUM DISTINCT totals different amounts without checking order identity. I’d establish the row grain first. Compare equal-priced orders, repeated copies and missing amounts.
SQL SERVER – Reason for SQL Server Agent Starting Before SQL Server Engine Service
Why is SQL Server Agent starting before SQL Server Engine service? A user group member asked me, and here are my quick reasons, from jobs to OS tasks.
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