超KUSO 穿著布料多少,差很大...
SQL ISNULL(), NVL(), IFNULL() and COALESCE() Functions 就跟你說了吧...........................XDIn the example above, if any of the "UnitsOnOrder" values are NULL, the result is NULL. Microsoft's ISNULL() function is used to specify how we want to treat NULL values. The NVL(), IFNULL(), and COALESCE() functions can also be used to achieve the same ....
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