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Applies to: 
Databricks SQL Databricks Runtime
Returns the character length of string data or number of bytes of binary data. This function is a synonym for char_length function and length function.
Syntax
character_length(expr)
Arguments
expr: A BINARY or STRING expression.
Returns
The result type is INTEGER.
The length of string data includes the trailing spaces. The length of binary data includes binary zeros.
Examples
> SELECT character_length('Spark SQL ');
10
> select character_length('床前明月光')
5