--根据员工号或员工姓名获取员工的信息

--根据员工号或员工姓名删除员工的信息

--创建包规范

CREATE OR REPLACE PACKAGE overload_pkg

IS

FUNCTION get_info(eno NUMBER) RETURN emp%ROWTYPE;

FUNCTION get_info(name VARCHAR2) RETURN emp%ROWTYPE;

PROCEDURE del_emp(eno NUMBER);

PROCEDURE del_emp(name VARCHAR2);

END;

--创建包体

CREATE OR REPLACE PACKAGE BODY overload_pkg

IS

FUNCTION get_info(eno NUMBER) RETURN emp%ROWTYPE

IS

emp_record emp%ROWTYPE;

BEGIN

SELECT * INTO emp_record FROM emp WHERE empno = eno;

RETURN emp_record;

EXCEPTION

WHEN NO_DATA_FOUND THEN

RAISE_APPLICATION_ERROR(-20020,‘不存在此员工！‘);

END;

FUNCTION get_info(name VARCHAR2) RETURN emp%ROWTYPE

IS

emp_record emp%ROWTYPE;

BEGIN

SELECT * INTO emp_record FROM emp WHERE ename = name;

RETURN emp_record;

EXCEPTION

WHEN NO_DATA_FOUND THEN

RAISE_APPLICATION_ERROR(-20020,‘不存在此员工！‘);

END;

PROCEDURE del_emp(eno NUMBER)

IS

BEGIN

DELETE FROM emp WHERE empno = eno;

IF SQL%NOTFOUND THEN

RAISE_APPLICATION_ERROR(-20020,‘不存在此员工‘);

END IF;

END;

PROCEDURE del_emp(name VARCHAR2)

IS

BEGIN

DELETE FROM emp WHERE ename = name;

IF SQL%NOTFOUND THEN

RAISE_APPLICATION_ERROR(-20020,‘不存在此员工‘);

END IF;

END;

END;

--调用

--根据员工号查询员工信息

DECLARE

emp_record emp%rowtype;

e_no_emp EXCEPTION;

PRAGMA EXCEPTION_INIT(e_no_emp,-20020);

BEGIN

emp_record:= overload_pkg.get_info(&no);

DBMS_OUTPUT.PUT_LINE(‘员工号：‘||emp_record.empno||‘姓名：‘||emp_record.ename||‘工资：‘||emp_record.sal);

EXCEPTION

WHEN e_no_emp THEN

DBMS_OUTPUT.put_line(SQLERRM);

END;

--根据员工姓名查询员工信息

DECLARE

emp_record emp%rowtype;

e_no_emp EXCEPTION;

PRAGMA EXCEPTION_INIT(e_no_emp,-20020);

BEGIN

emp_record:= overload_pkg.get_info(‘&name‘);

DBMS_OUTPUT.PUT_LINE(‘员工号：‘||emp_record.empno||‘姓名：‘||emp_record.ename||‘工资：‘||emp_record.sal);

EXCEPTION

WHEN e_no_emp THEN

DBMS_OUTPUT.put_line(SQLERRM);

END;

--根据员工号删除员工信息

DECLARE

e_no_emp EXCEPTION;

PRAGMA EXCEPTION_INIT(e_no_emp, -20020);

BEGIN

overload_pkg.del_emp(&no);

COMMIT;

EXCEPTION

WHEN e_no_emp THEN

DBMS_OUTPUT.put_line(SQLERRM);

ROLLBACK;

END;

SELECT * FROM EMP;

--根据员工的姓名删除员工的信息

DECLARE

e_no_emp EXCEPTION;

PRAGMA EXCEPTION_INIT(e_no_emp, -20020);

BEGIN

overload_pkg.del_emp(‘&name‘);

COMMIT;

EXCEPTION

WHEN e_no_emp THEN

DBMS_OUTPUT.put_line(SQLERRM);

ROLLBACK;

END;

Oracle数据库---包

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