sum

This function is used to calculate the total sum.

Syntax

sum(col), 
sum(DISTINCT col)

Parameters

**Table 1** Parameter
Parameter	Mandatory	Description
col	Yes	The value can be of any data type and can be converted to the DOUBLE type for calculation. The value can be of the DOUBLE, DECIMAL, or BIGINT type. If the value is of the STRING type, the system implicitly converts it to DOUBLE for calculation.

Return Values

The return value is of the DOUBLE type.

If the value of col is NULL, the row is not involved in calculation.

Example Code

Calculates the total number of offerings (items) in all warehouses. An example command is as follows:
```
select sum(items) from warehouse;
```
The command output is as follows:
```
_c0        
55357      
```
When used with group by, it groups all offerings by warehouse (warehouseId) and calculates the total number of offerings in all warehouses. An example command is as follows:
```
select warehouseId, sum(items) from warehouse group by warehouseId;
```
The command output is as follows:
```
warehouseId| _c1        
city1    15500      
city2    10175      
city3    19400      
```

Parent topic: Aggregate Functions