VALUES / VALUE

Access values in ON DUPLICATE KEY UPDATE. This function retrieves the value that would have been inserted into a column if no key conflict occurred.

Syntax

VALUE(col_name)

Description

In an INSERT ... ON DUPLICATE KEY UPDATE statement, you can use the VALUES(col_name) function in the UPDATE clause to refer to column values from the INSERT portion of the statement. In other words, VALUES(col_name) in the UPDATE clause refers to the value of col_name that would be inserted, had no duplicate-key conflict occurred. This function is especially useful in multiple-row inserts.

The VALUES() function is meaningful only in INSERT ... ON DUPLICATE KEY UPDATE statements and returns NULL otherwise.

This function was renamed to VALUE(), because it's incompatible with the standard Table Value Constructors syntax.

The VALUES() function can still be used but only in INSERT ... ON DUPLICATE KEY UPDATE statements; it's a syntax error otherwise.

Examples

INSERT INTO t (a,b,c) VALUES (1,2,3),(4,5,6)
    ON DUPLICATE KEY UPDATE c=VALUE(a)+VALUE(b);

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