============================= 数据定义语句(DDL) ============================= .. toctree:: :maxdepth: 1 CREATE_DATABASE_STATEMENT SHOW_DATABASES_STATEMENT USE_DATABASE_STATEMENT DROP_DATABASE_STATEMENT DESC_STATEMENT CREATE_TABLE_STATEMENT DROP_TABLE_STATEMENT SHOW_COMPONENTS SHOW_TABLES_STATEMENT SHOW_VARIABLES_STATEMENT SHOW_TABLE_STATUS SET_STATEMENT CREATE_INDEX_STATEMENT DROP_INDEX_STATEMENT CREATE_FUNCTION SHOW_FUNCTIONS DROP_FUNCTION