.NET and SQL Server interview question: – What is difference between truncate and delete?

Answer:

Both Truncate and Delete are used to delete data from the tables.  Below are some important differences.

TRUNCATE is a DDL (data definition language) statment whereas DELETE is a DML (data manipulation language) statement.

  • In DELETE command we can use where condition in TRUNCATE you cannot.
  • TRUNCATED data cannot be rolled back while delete can be.
  • When there are triggers on table and when you fire truncate trigger do not fire . When you fire delete command triggers are executed.
  • TRUNCATE resets the identity counter value where DELETE does not.
  • Delete and Truncate both are logged operation. Delete operation is logged on row basis while TRNCATE logs at page level.
  • TRUNCATE is faster than DELETE.Regards,
    View my 21 important Most asked Dotnet interview questions
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