---
{
    "title": "VARIANCE_SAMP,VARIANCE_SAMP",
    "language": "en"
}
---

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# VARIANCE_SAMP,VARIANCE_SAMP
## Description
### Syntax

`VAR SAMP (expr)`


Returns the sample variance of the expr expression

## example
```
MySQL > select var_samp(scan_rows) from log_statis group by datetime;
+-----------------------+
| var_samp(`scan_rows`) |
+-----------------------+
|    5.6227132145741789 |
+-----------------------+
```
## keyword
VAR SAMP, VARIANCE SAMP,VAR,SAMP,VARIANCE