Cached plan reuse is invisible in a result set. This post shows three checks on SQL Server: the compiled and runtime parameter values in the plan, the usecounts column of the plan cache, and the plan creation time.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
Login Database Access: List the Databases a Login Can Open
Check login database access by matching the login SID against the users of every online database. One query shows the user, the CONNECT state and the guest back door, and it needs no impersonation.
Get Current Time Zone – SQL in Sixty Seconds #187
Lots of people often ask me how to get the current time zone in SQL Server when I am working on Comprehensive Database Performance Health Check.
Detecting Memory Pressure – SQL in Sixty Seconds #186
After my video on CPU running 100%, many of you asked for one on memory. Here is my SQL in Sixty Seconds video on detecting memory pressure.
MySQL – Wait For Seconds Using SELECT SLEEP()
For a WAIT FOR test in MySQL, I use SLEEP with a bounded delay. A customer asked for the corresponding command.
Parquet Exports From SQL Server 2022 With CETAS
Build Parquet exports from SQL Server 2022 with PolyBase CETAS, S3-compatible storage, and checks for rows, types, and files.
IGNORE NULLS in SQL Server 2022: Carrying the Last Known Value Forward
Use IGNORE NULLS for forward-filled readings, find the next known value, and compare the older running-count grouping method carefully.
SQL Server slow? Let's fix it together in about four hours.
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Who We Are
Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 24 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.
Pinal has authored 19 books and 125 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://blog.sqlauthority.com.
Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2).
Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long-term multi-channel campaigns to drive leads for their sales pipeline.
Shaivi Pinalkumar Dave is a book author and a women’s artistic gymnast.

