Nóta
Teastaíonn údarú chun rochtain a fháil ar an leathanach seo. Is féidir leat triail a bhaint as shíniú isteach nó eolairí a athrú.
Teastaíonn údarú chun rochtain a fháil ar an leathanach seo. Is féidir leat triail a bhaint as eolairí a athrú.
Applies to: 
Databricks Runtime 15.3 and above
Casts the value expr to the target data type type with error toleration. This operator is a synonym for try_cast function.
Syntax
expr ?:: type
Arguments
expr: Any castable expression.
Returns
The result is type type.
Examples
> SELECT '20'?::INTEGER;
20
> SELECT 'twenty'?::INTEGER;
NULL
> SELECT typeof(NULL?::STRING);
string