📅  最后修改于: 2022-03-11 15:05:18.604000             🧑  作者: Mango
SET SERVEROUTPUT ON;
DECLARE
sql_qry VARCHAR2 (150);
emp_tot NUMBER(3);
BEGIN
sql_qry:= 'SELECT count (*) FROM employees';
EXECUTE IMMEDIATE sql_qry INTO emp_tot;
DBMS_OUTPUT.PUT_LINE ('Total employees are: '||emp_tot);
END;