5 Questions
What happens if you try to explicitly set a value for an autoincrementing field when adding a new record to a table?
An error will occur.
Which function should you use to ensure you retrieve the last autoincremented value inserted by your session, regardless of the table?
SCOPE_IDENTITY()
Which clause should be used to prevent setting a value in an autoincrementing field when inserting a record?
DEFAULT
What is the primary purpose of the IDENT_CURRENT() function?
To return the last identity value generated for a specified table
In which scenario would the IDENT_CURRENT() function return an unexpected result?
When multiple users are inserting records concurrently
Study Notes
Autoincrementing Fields
- When adding new records to a table, you do not include a value for an autoincrementing field.
- Autoincrementing fields automatically generate a unique value when a new record is inserted.
Transact-SQL Functions
- The
IDENT_CURRENT()function returns the last autoincremented value that was created for a specified table.
Test your knowledge of SQL queries with these questions. Learn about autoincrementing fields and Transact-SQL functions.
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