A database for multiple customers can share tables, split schemas, or split databases; the choice balances isolation and operating cost.
Keeping Personal Data Out of Test Databases
Keeping personal data out of test databases requires synthetic records or masking during refresh, plus verification before access.
Encrypting Connections to SQL Server
Encrypting connections to SQL Server requires a trusted certificate, careful Force Encryption rollout, and tests with real drivers.
SQL SERVER – Fix : Error : Login failed for user ‘UserName’. The user is not associated with a trusted SQL Server connection
Login failed, not associated with a trusted SQL Server connection? I hit it between SQL Server 2008 and 2005 and fixed it with a matching Windows user.
SQL SERVER – Stored Procedure WITH ENCRYPTION and Execution Plan
Here is what I found about WITH ENCRYPTION and execution plan: an encrypted SP hides its actual execution plan too. Two sample SPs show it.
SQL SERVER – Transaction and Local Variables – Swap Variables – Update All At Once Concept
Two ideas with examples: transactions have no effect on local variables, and an UPDATE applies all its changes at once, which lets you Swap Variables in one go.
SQL Injection: The Joke, the Failure and the Parameter Fix
SQL Injection makes a good joke and a terrible incident. The tests here show a concatenated query returning every row for one hostile name, the same text passed as a parameter returning none, a table name caught by QUOTENAME, and a read-only user blocked from dropping a table.