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