The HAS_DBACCESS function tells you whether the current login can open a database. One query over sys.databases turns it into a list, and this post tests six databases to show what each zero means: no user, offline, restricted or a busy single user slot.
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Memory-Optimized TempDB Tables: List Them and Check Status
Memory-optimized TempDB tables are the system tables that SQL Server 2019 and later can keep in memory. This post shows two queries: one that checks whether the feature is on, and one that lists the tables it covers. It also explains the limits that come with the feature.
Metadata Contention in TempDB: When Memory-Optimized Metadata Helps
Metadata contention in TempDB happens when many sessions create and drop temporary tables at the same moment. This post reads the waits that point to it, explains why RESOURCE_SEMAPHORE is a different problem, and shows how SQL Server 2019 and later can keep that metadata in memory.
Why FLOAT Math Does Not Add Up in T-SQL Queries
See why FLOAT math produces approximate sums and comparisons in SQL Server, then use DECIMAL or tolerance checks for the right data.
Visible Offline Schedulers: Find CPUs SQL Server Ignores
Visible offline schedulers are CPUs that Windows shows and SQL Server refuses to use. This post reads the scheduler status with tested queries, compares it with the CPU count and affinity, and explains the two common causes. It also shows the statement that returns the CPUs to automatic affinity.
Nonclustered Primary Key Test: Last Page Insert Waits
A nonclustered primary key test shows whether a heap fixes last page insert waits. On SQL Server 2025 it doesn’t, because the key index still rises. A lane layout that spreads the inserts removes the latch wait, and the post shows the cost of that layout.
Where to Download SQL Server 2019 for FREE? – Interview Question of the Week #276
Question: Where to Download SQL Server 2019 for FREE?
Answer: This is one of the most popular questions, I keep on receiving from blog readers.
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