STDDEV_SAMP

description

Syntax

STDDEV_SAMP(expr)

返回expr表达式的样本标准差

example

  1. MySQL > select stddev_samp(scan_rows) from log_statis group by datetime;
  2. +--------------------------+
  3. | stddev_samp(`scan_rows`) |
  4. +--------------------------+
  5. |        2.372044195280762 |
  6. +--------------------------+

keyword STDDEV_SAMP,STDDEV,SAMP