AVG

Description

Aggregate function.

The AVG() function calculates the average value of the argument.

Syntax

> AVG(expr)

Arguments

Arguments	Description
expr	Any numerical expression

Returned Value

The arithmetic mean, always as Double.

NaN if the input parameter is empty.

Examples

```sql

drop table if exists tbl1; drop table if exists tbl2; create table tbl1 (col_1a tinyint, col_1b smallint, col_1c int, col_1d bigint, col_1e char(10) not null); insert into tbl1 values (0,1,1,7,"a"); insert into tbl1 values (0,1,2,8,"b"); insert into tbl1 values (0,1,3,9,"c"); insert into tbl1 values (0,1,4,10,"D"); insert into tbl1 values (0,1,5,11,"a"); insert into tbl1 values (0,1,6,12,"c");

select avg(col_1c) from tbl1; +-------------+ | avg(col_1c) | +-------------+ | 3.5000 | +-------------+

select sum(col_1d) as s1,avg(col_1d) as a3 from tbl1 group by col_1e order by s1 desc; +------+---------+ | s1 | a3 | +------+---------+ | 21 | 10.5000 | | 18 | 9.0000 | | 10 | 10.0000 | | 8 | 8.0000 | +------+---------+

select avg(col_1d) as a1 from tbl1 where col_1d < 13 group by col_1e order by a1; +---------+ | a1 | +---------+ | 8.0000 | | 9.0000 | | 10.0000 | | 10.5000 | +---------+ ```