What is scope of identity?

What is scope of identity?

@@IDENTITY returns the last identity column value inserted across any scope in the current session. The SCOPE_IDENTITY() function returns the null value if the function is invoked before any INSERT statements into an identity column occur in the scope.

What is identity return?

The @@IDENTITY is a system function that returns the last IDENTITY value generated for any table with an identity column under the current session, regardless of the scope of the T-SQL statement that generated the value.

What is the difference between identity and Scope_identity scope in SQL Server?

7 Answers. The @@identity function returns the last identity created in the same session. The scope_identity() function returns the last identity created in the same session and the same scope. The ident_current(name) returns the last identity created for a specific table or view in any session.

What’s the difference between @ @ identity and scope _ identity?

If you insert a row into the table, @@IDENTITY and SCOPE_IDENTITY () return different values. SCOPE_IDENTITY () returns the value from the insert into the user table, whereas @@IDENTITY returns the value from the insert into the replication system table. Use SCOPE_IDENTITY () for applications that require access to the inserted identity value.

When does scope _ identity return NULL in SQL?

The SCOPE_IDENTITY () function will return the null value if the function is invoked before any INSERT statements into an identity column occur in the scope. Your SQL code would be very helpful.

When do two statements have the same scope?

Returns the last identity value inserted into an identity column in the same scope. A scope is a module: a stored procedure, trigger, function, or batch. Therefore, if two statements are in the same stored procedure, function, or batch, they are in the same scope.

How is IDENT _ CURRENT limited by scope and session?

IDENT_CURRENT is not limited by scope and session; it is limited to a specified table. IDENT_CURRENT returns the value generated for a specific table in any session and any scope. For more information, see IDENT_CURRENT (Transact-SQL).