​Section 9:102.Type Cast Functions for Data Type Conversion

In Hive, you can convert data from one data type to another using type conversion functions. These functions allow you to transform data into a format that is suitable for a specific operation or query. Here are some of the commonly used type conversion functions in Hive:

1. CAST(expression AS data_type) – converts an expression to the specified data type. For example, CAST(‘123’ AS INT) converts the string ‘123’ to an integer.

2. CONVERT(expression, data_type) – converts an expression to the specified data type. For example, CONVERT(‘123’, INT) converts the string ‘123’ to an integer.

3. TO_DATE(string) – converts a string in the format ‘yyyy-MM-dd’ to a date data type.