# BOOL\$1OR function
<a name="BOOL_OR"></a>

The BOOL\$1OR function operates on a single Boolean or integer column or expression. This function applies similar logic to the BIT\$1AND and BIT\$1OR functions. For this function, the return type is a Boolean value (`true`, `false`, or `NULL`).

If a value in a set is `true`, the BOOL\$1OR function returns `true` (`t`). If a value in a set is `false`, the function returns `false` (`f`). NULL can be returned if the value is unknown.

## Syntax
<a name="BOOL_OR-synopsis"></a>

```
BOOL_OR ( [DISTINCT | ALL] expression )
```

## Arguments
<a name="BOOL_OR-arguments"></a>

 *expression *   
The target column or expression that the function operates on. This expression must have a BOOLEAN or integer data type. The return type of the function is BOOLEAN.

DISTINCT \$1 ALL  
With the argument DISTINCT, the function eliminates all duplicate values for the specified expression before calculating the result. With the argument ALL, the function retains all duplicate values. ALL is the default. 

## Examples
<a name="bool_or_example"></a>

You can use the Boolean functions with either Boolean expressions or integer expressions. For example, the following query return results from the standard USERS table in the TICKIT database, which has several Boolean columns.

The BOOL\$1OR function returns `true` for all five rows. At least one user in each of those states likes sports.

```
select state, bool_or(likesports) from users 
group by state order by state limit 5;

state | bool_or 
------+--------
AB    | t      
AK    | t      
AL    | t       
AZ    | t       
BC    | t       
(5 rows)
```

The following example returns NULL.

```
SELECT BOOL_OR(NULL = '123')
               bool_or
------                  
NULL
```