SQL Interview: #6: Multi-row INSERT operations

Job Interview

This is a post in the SQL Interview series. These aren't trick or gotcha questions, they're just questions designed to scope out a candidate's knowledge around SQL Server and Azure SQL Database.

Section: Development
Level: Intro

Question:

Look at the following multi-row INSERT statement:

The column CustomerGroupName is defined as NOT NULL so the second row cannot be inserted.

How many rows are inserted by this statement, assuming there are no other errors?

Answer:

INSERT statements are atomic, even for multi-row INSERT statements. Either all the rows are inserted, or none are.

If one row fails (as in this case), no rows are inserted.

 

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