pl/sql中操作DML语句:7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 INSERT DECLARE v_empno emp.empno%TYPE := empno; v_ename emp.ename%TYPE := ename; v_salary emp.sal%TYPE := sal; BEGIN INSERT INTO emp(empno,ename,sal) VALUES(v_empno,v_e 7