本文介紹了PolarDB-X 1.0支持的比較函數(shù)。

PolarDB-X 1.0支持如下比較函數(shù)：

函數(shù)名	描述?
COALESCE()	Return the first non-NULL argument
GREATEST()	Return the largest argument
IN()	Check whether a value is within a set of values
INTERVAL()	Return the index of the argument that is less than the first argument
ISNULL()	Test whether the argument is NULL
LEAST()	Return the smallest argument
NOT IN()	Check whether a value is not within a set of values
STRCMP()	Compare two strings