Differences between several functions in the ID column

Source: Internet
Author: User

-- Differences between several functions of the ID column


-- @ Difference between identity and scope_identity and ident_current


@ Identity -- Obtain the last inserted identity value for all scopes of the current session.

Scope_identity () -- Obtain the last inserted identity value of the current scope of the current session.

Ident_current () -- Obtain the last inserted identity value of the specified table, regardless of the session and scope.


-- A session is a user connection.

-- A scope is a module-stored procedure, trigger, function, or batch processing.

========================================================== =


-- Several functions related to the identifier.


Select ident_current ('table name') -- identifies the current value

Select ident_incr ('table name') -- id Increment

Select ident_seed ('table name') -- identifies a seed


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