Category: SQL

Inspect mysql.sys and mysql.session safely, leave their credentials untouched, and repair upgrade readiness through the supported server path.

Project required columns from the inner query and reference only the derived-table alias from the outer paging query.

Compare driver versions under the same load, close every JDBC resource, inspect retained objects, and isolate statement-pooling settings.

Compare estimated and actual rows, verify that the predicate matches the filtered index, and test estimator changes without changing the whole database first.

Verify the tempdb file paths, recreate the Azure ephemeral-disk folder and permissions, and start SQL Server only after the disk is ready.

Capture the Merge Agent output and locate the first database error instead of treating the final rollback message as the root cause.

Measure expensive statements, execution plans, and lock waits before assuming that archiving old MySQL rows will fix application latency.

Speed up SQL Server entity-attribute-value searches by using selective EXISTS predicates and indexes that match each typed lookup.

Remove a broken LocalDB database registration after its MDF file is missing without deleting the entire LocalDB instance.

Extract process details from xml_deadlock_report events captured by the SQL Server system_health session on Amazon RDS.