typeof function
Applies to: 
Databricks SQL Databricks Runtime
Return a DDL-formatted type string for the data type of the input.
Syntax
typeof(expr)
Arguments
expr: Any expression.
Returns
A STRING.
To derive the type of a VARIANT value, use the schema_of_variant function function.
To derive the combined schema of a group of VARIANT values, use the schema_of_variant_agg aggregate function aggregate function.
Examples
> SELECT typeof(1);
int
> SELECT typeof(array(1));
array<int>
> SELECT typeof(123.4::VARIANT);
variant
> SELECT schema_of_variant(123.4::VARIANT);
DECIMAL(4,1)
> SELECT typeof('hello' COLLATE UTF8_LCASE);
string collate UTF8_LCASE