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【mysql】SIGN(x) function

2022-08-03 17:39:00 【Tan Yue sword refers to the big factory】

SIGN(x)

SIGN(x) returns the sign of the parameter. When the value of x is negative, zero or positive, the return result is -1, 0 or 1 in turn

 select SIGN(-21), SIGN(0), SIGN(21)Return: -1 0 1
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