====== UPPER Function - PL/HQL Reference====== UPPER function converts a string expression to upper case. **Syntax**: <code language="sql"> UPPER(expression); </code> **Return Data Type:** STRING **Example:** Convert a string to upper case: <code language="sql"> UPPER('abc'); --- ABC </code> **Compatibility**: Oracle, Microsoft SQL Server, IBM DB2, Teradata, PostgreSQL, MySQL and Netezza **Version**: PL/HQL 0.03