#0402–SQL Server 2016 – KB3207512 fails–Msg 17054 – Unable to shutdown the instance; Operating System Error 21 (The device is not ready)

Performance of a query having multiple equality type predicates improves as it switches from using the index on an unselective column to a selective one. It is very common to issue queries with multi...

Introduction Before Oracle 12.1.0.1, whenever a table partition was dropped all the global indexes that were created on that table became UNUSABLE unless we specified the clause UPDATE INDEXES in the ...