STDDEV_POP和STDDEV_SAMP是统计学中常用的两个函数,用于计算一组数据的标准差。 1. STDDEV_POP(Population Standard Deviation)是总体标准差...
var_samp: 0.00110000 var_pop: 0.00100000 stddev_samp: 0.03316625 stddev_pop: 0.03162278 stddev_samp/stddev_pop: 1.04880885 This section assumes that you understand the distinction between the "population" and the "sample" variants and that you know which variant you need for your pres...
STDDEV_POP STDDEV_SAMP SUM VAR_POP VAR_SAMP VARIANCE WMSYS.WM_CONCAT/WM_CONCAT Expressions Conditions Queries and subqueries SQL statements DDL feature SQL specifications and practices PL reference Reserved keywords (MySQL mode) Reserved keywords (Oracle mode) ...
This function is used to return the sample deviation of a specified column.The return value is of the DOUBLE type.Calculates the sample deviation of all offering inventor