Expand a bill of materials with a recursive CTE, multiply quantities across levels, trace component paths, and guard against cycles.
Schema-Bound Views: Protect Referenced Columns
Schema-bound views protect referenced columns during table changes. Compare blocked DDL with compatible additions, and check how an ordinary view can retain stale metadata until it is refreshed.
Leap Years in T-SQL: February 29 and Date Math
Handle leap years in T-SQL with date functions, test February boundaries, and choose a clear anniversary rule for February 29 births.
SQL SERVER – Finding Last Backup Time for All Database
Last Backup Time comes from recorded history, which I check by backup type. Recovery still needs the files and a tested chain.
SQL SERVER – Fix: Error: MS Jet OLEDB 4.0 cannot be used for distributed queries because the provider is used to run in apartment mode.
MS Jet OLEDB 4.0 cannot be used for distributed queries because it runs in apartment mode? Turning on Ad Hoc Distributed Queries with sp_configure fixes it.
COUNT OVER: Show the Filtered Total Beside Page Rows
COUNT OVER helps me keep a page’s row count separate from the filtered total. Compare full and partial pages. An empty page needs an explicit total-count contract.
Find the Last Read and Write Time of Every Table in SQL Server
Find the last read and write time of every table in SQL Server with sys.dm_db_index_usage_stats. The tests show what counts as a read, why an insert counts as a write, what an index rebuild does to the numbers, and what wipes them.