Common table expressions for readability name query steps and support recursion, but they do not promise cached intermediate results.
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geometry STDistance: Measure the Closest Points of Two Shapes
geometry STDistance measures the shortest distance between points belonging to two represented shapes. I compare an interior gap with an endpoint gap. Intersecting shapes provide a useful zero-distance case.
SELECT * in Production Code: The Hidden Costs
See the real costs of SELECT * in production code: lost covering indexes, lookups, stale view metadata, broken inserts and wider results.
SQL SERVER – Applying NOLOCK Hint at Query Level – NOLOCK for whole Transaction
Can you apply the NOLOCK hint to a whole query with OPTION (NOLOCK)? No, it fails with Msg 102. Here is how I use an isolation level instead.
SQL SERVER – Making Database to Read Only – Changing Database to Read/Write
A reader attached a client database and it showed as Read Only. Two simple ALTER DATABASE scripts switch a database to READ_ONLY and back to READ_WRITE.
SQL SERVER – Finding Location of Log File when Primary Datafile is Crashed
Do you need the primary datafile to back up the log after a crash? Vinod Kumar asked, so I tried finding the location of the log file without it.
SQL SERVER – Transaction Log Impact Detection Using DMV – dm_tran_database_transactions
Which DMV shows the effect of a transaction on the transaction log file? My quick script uses dm_tran_database_transactions to show it per transaction.
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