tobool
The tobool function converts the input to a value of type bool.
Aliases: bool.
Syntax
tobool( Expression )
Arguments
- Expression: Expression to convert to a
boolvalue.
Returns
If the type conversion is successful, returns a bool value.
If the type conversion fails, returns null.
Examples
| Query | Result |
|---|---|
tobool("true") | true |
tobool("TRUE") | true |
tobool("yes") | true |
tobool("false") | false |
tobool("f") | false |
tobool(1) | true |
tobool("1") | true |
tobool(123) | true |
tobool(0) | false |
tobool(0.0) | false |
tobool("abc") | null |
tobool(null) | null |