| --- |
| { |
| "title": "VARIANCE,VAR_POP,VARIANCE_POP", |
| "language": "en" |
| } |
| --- |
| |
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| |
| ## VARIANCE,VAR_POP,VARIANCE_POP |
| ### Description |
| #### Syntax |
| |
| `VARIANCE(expr)` |
| |
| |
| Returns the variance of the expr expression |
| |
| ### example |
| ``` |
| MySQL > select variance(scan_rows) from log_statis group by datetime; |
| +-----------------------+ |
| | variance(`scan_rows`) | |
| +-----------------------+ |
| | 5.6183332881176211 | |
| +-----------------------+ |
| |
| MySQL > select var_pop(scan_rows) from log_statis group by datetime; |
| +----------------------+ |
| | var_pop(`scan_rows`) | |
| +----------------------+ |
| | 5.6230744719006163 | |
| +----------------------+ |
| ``` |
| ### keywords |
| VARIANCE,VAR_POP,VARIANCE_POP,VAR,POP |
