多项选择题
A.INSERT INTOv_emp VALUES(101,’Tom’,30,100); B.INSERT INTOv_emp VALUES(102,’Ken’,100,80); C.UPDATE v_emp SET ename=’Blus’WHEREdepno=100; D.UPDATE v_emp SET ename=’Kate’WHEREdepno=30;
A.sys_class B.sys_stat_database C.sys_stats D.sys_statistics
A.seq_page_cost B.random_page_cost C.vacuum_cost_limit D.cpu_tuple_cost