oracle – PL / SQL ORA-01422：精确的提取返回超过请求的行数

我得到这个错误我不知道是什么错了.

“宣布

*
第1行出错

ORA-01422：精确提取返回超过请求的行数

ORA-06512：在第11行“

这是我的代码

DECLARE

rec_EMPID EMPLOYEE.EMPID%TYPE;
rec_ENAME EMPLOYEE.ENAME%TYPE;
rec_JOB EMPLOYEE.DESIGNATION%TYPE;
rec_SAL EMPLOYEE.SALARY%TYPE;
rec_DEP DEPARTMENT.DEPT_NAME%TYPE;

BEGIN

SELECT EMPLOYEE.EMPID,EMPLOYEE.ENAME,EMPLOYEE.DESIGNATION,EMPLOYEE.SALARY,DEPARTMENT.DEPT_NAME INTO rec_EMPID,rec_ENAME,rec_JOB,rec_SAL,rec_DEP FROM EMPLOYEE,DEPARTMENT WHERE EMPLOYEE.SALARY > 3000;

DBMS_OUTPUT.PUT_LINE ('Employee Nnumber: ' || rec_EMPID);
DBMS_OUTPUT.PUT_LINE ('---------------------------------------------------');
DBMS_OUTPUT.PUT_LINE ('Employee Name: ' || rec_ENAME);
DBMS_OUTPUT.PUT_LINE ('---------------------------------------------------');
DBMS_OUTPUT.PUT_LINE ('Employee Designation: ' || rec_JOB);
DBMS_OUTPUT.PUT_LINE ('----------------------------------------------------');
DBMS_OUTPUT.PUT_LINE ('Employee Salary: ' || rec_SAL);
DBMS_OUTPUT.PUT_LINE ('----------------------------------------------------');
DBMS_OUTPUT.PUT_LINE ('Employee Department: ' || rec_DEP);

END;
/

最有可能的是,你想使用一个游标遍历(潜在的)多行数据(我也假设你打算在两个表之间做一个正确的连接,而不是做一个笛卡尔乘积,所以我假设那里是两个表中的departmentID列)

BEGIN
  FOR rec IN (SELECT EMPLOYEE.EMPID,DEPARTMENT.DEPT_NAME 
                FROM EMPLOYEE,DEPARTMENT 
               WHERE employee.departmentID = department.departmentID
                 AND EMPLOYEE.SALARY > 3000)
  LOOP
    DBMS_OUTPUT.PUT_LINE ('Employee Nnumber: ' || rec.EMPID);
    DBMS_OUTPUT.PUT_LINE ('---------------------------------------------------');
    DBMS_OUTPUT.PUT_LINE ('Employee Name: ' || rec.ENAME);
    DBMS_OUTPUT.PUT_LINE ('---------------------------------------------------');
    DBMS_OUTPUT.PUT_LINE ('Employee Designation: ' || rec.DESIGNATION);
    DBMS_OUTPUT.PUT_LINE ('----------------------------------------------------');
    DBMS_OUTPUT.PUT_LINE ('Employee Salary: ' || rec.SALARY);
    DBMS_OUTPUT.PUT_LINE ('----------------------------------------------------');
    DBMS_OUTPUT.PUT_LINE ('Employee Department: ' || rec.DEPT_NAME);
  END LOOP;
END;

我假设你只是学习PL / SQL.在实际的代码中,您永远不会像这样使用dbms_output,而不会依赖任何人看到您写入dbms_output缓冲区的数据.

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