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The synonym for last_insert_id session variable is _____________

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The synonym for last_insert_id session variable is _____________

(a) insert_id

(b) identity

(c) sql_auto_is_null

(d) sql_big_selects

I got this question during an online interview.

Enquiry is from Session-Only System Variables in portion System, Status and User Variables of MySQL

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Correct choice is (b) identity

To explain I would say: The session only system variable ‘identity’ is a synonym for the ‘last_insert_id’ session variable. Setting ‘last_insert_id’ specifies the value to be returned by the function ‘LAST_INSERT_ID()’.

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