What is UNION in SQL Server? How will you differentiate it from UNION ALL? To defend against power loss or any database crash, all transactions and their effects must be recorded in a non-volatile memory.Ģ. In RDBMS, once a group of SQL statements execute, the results need to be stored permanently in the database even if the database crashes immediately thereafter.
This list includes questions based on joins, complex queries, performance tuning, cluster etc.ġ. You must know the answers of these frequently asked SQL Server questions to clear the These interview questions are targeted for SQL Server for developers and DBA. SQL Server Interview Questions and Answers