Advanced SQL Server Interview Questions and Answers

 There are Magic Tables (virtual tables) in SQL Server that hold the temporal information of recently inserted and recently deleted data in the virtual table. INSERTED and DELETED are two types of magic tables in SQL Server. An INSERTED magic table is populated with INSERT and UPDATE operations and DELETED magic table is populated with UPDATE and DELETE operations. A magic table can be utilized in INSERT, UPDATE, and DELETE activity with the table in a trigger, which is the common understanding of people. SQL Server uses magic tables outside the TRIGGER also for a lot of other purposes too. Use of Magic tables in SQL Server with the usual update statement lessens the information dependency and makes your information consistent with your transaction. 

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