SQL ReferenceSQL FunctionsString FunctionsUPPEROn this pageUPPERupperβdescriptionβSyntaxβVARCHAR upper(VARCHAR str)Convert all strings in parameters to uppercase. Another alias for this function is ucase.exampleβmysql> SELECT upper("aBc123");+-----------------+| upper('aBc123') |+-----------------+| ABC123 |+-----------------+keywordsβUPPER