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What MySQL MAKE_SET() function returns if there are all NULL at the place of strings?
MySQL MAKE_SET() function will return nothing if there are all NULL at the place of strings. Following example will demonstrate it −
Example
mysql> Select MAKE_SET(2, NULL,NULL,NULL); +-----------------------------+ | MAKE_SET(2, NULL,NULL,NULL) | +-----------------------------+ | | +-----------------------------+ 1 row in set (0.00 sec)
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