# Logical

- [Coalesce (Any value1, Any value2)](/astera-data-stack-v6/functions/logical/coalesce-any-value1-any-value2.md)
- [IsNotNull (AnyValue)](/astera-data-stack-v6/functions/logical/isnotnull-anyvalue.md)
- [IsRealNumber (AnyValue)](/astera-data-stack-v6/functions/logical/isrealnumber-anyvalue.md)
- [IsValidSqlDate (Date)](/astera-data-stack-v6/functions/logical/isvalidsqldate-date.md)
- [IsDate (AnyValue)](/astera-data-stack-v6/functions/logical/isdate-anyvalue.md)
- [If (Boolean)](/astera-data-stack-v6/functions/logical/if-boolean.md)
- [If (DateTime)](/astera-data-stack-v6/functions/logical/if-datetime.md)
- [If (Double)](/astera-data-stack-v6/functions/logical/if-double.md)
- [Exists](/astera-data-stack-v6/functions/logical/exists.md)
- [If (Int64)](/astera-data-stack-v6/functions/logical/if-int64.md)
- [If (String)](/astera-data-stack-v6/functions/logical/if-string.md)
- [IsDate (str, strformat)](/astera-data-stack-v6/functions/logical/isdate-str-strformat.md)
- [IsInteger (AnyValue)](/astera-data-stack-v6/functions/logical/isinteger-anyvalue.md)
- [IsNullOrWhitespace (StringValue)](/astera-data-stack-v6/functions/logical/isnullorwhitespace-stringvalue.md)
- [IsNullorEmpty (StringValue)](/astera-data-stack-v6/functions/logical/isnullorempty-stringvalue.md)
- [IsNull (AnyValue)](/astera-data-stack-v6/functions/logical/isnull-anyvalue.md)
- [IsNumeric (AnyValue)](/astera-data-stack-v6/functions/logical/isnumeric-anyvalue.md)