SAPHANA学习（22）：SQL Function(V)

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/*

148.VAR

Aggregate function:

VAR( [ ALL | DISTINCT ] <expression> )

Window function:

VAR( <expression> ) <window_specification>

Returns the variance of the given expression as the square of the standard deviation.

方差

VAR_POP(<expression>)

Returns the population variance of an expression.

VAR_SAMP(<expression>)

Returns the sample variance of an expression.

*/

SELECT VAR("Price") FROM "MyProducts";
SELECT VAR_POP("Price") FROM "MyProducts";
SELECT VAR_SAMP("Price") FROM "MyProducts";

SAPHANA学习（22）：SQL Function(V)

标签：ESS   sele   bsp   res   stand   via   color   reg   col   

原文地址：https://www.cnblogs.com/tangToms/p/13939793.html