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VAR_SAMP
Aggregate function. Calculates the sample variance value from a set of numbers. VAR_SAMP returns NULL if there are not matching rows.
Syntax
VAR_SAMP ( expression )
Arguments
- expression: any expression. This may be a column name, the result of another function, or a math operation.
Return Type
A double.
Examples
select VAR_SAMP(table_rows) from information_schema.tables;
+-----------------+
| VAR_SAMP(table_rows) |
+-----------------+
| 2.1500 |
+-----------------+
1 row in set (2.87 sec)
