dname、locを取得し、enameをカウントしようとしています。さらに、テーブルからsalを含めたいと思います。誰かが私が間違っていることを教えてもらえますか?
これが私が得たエラーを伴う私の声明です
SQL> select dname, loc, (select count(ename), sal from emp where DEPTNO = dept.deptno) as Number_of_people from dept;
select dname, loc, (select count(ename), sal from emp where DEPTNO = dept.deptno) as Number_of_people from dept
*
ERROR at line 1:
ORA-00913: too many values
SQL>
これが私のテーブルです
SQL> select empno, ename, job, hiredate, sal from emp;
EMPNO ENAME JOB HIREDATE SAL
---------- ---------- --------- --------- ----------
7839 KING PRESIDENT 17-NOV-81 5000
7698 BLAKE MANAGER 01-MAY-81 2850
7782 CLARK MANAGER 09-JUN-81 2450
7566 JONES MANAGER 02-APR-81 2975
7654 MARTIN SALESMAN 28-SEP-81 1250
7499 ALLEN SALESMAN 20-FEB-81 1600
7844 TURNER SALESMAN 08-SEP-81 1500
7900 JAMES CLERK 03-DEC-81 950
7521 WARD SALESMAN 22-FEB-81 1250
7902 FORD ANALYST 03-DEC-81 3000
7369 SMITH CLERK 17-DEC-80 800
EMPNO ENAME JOB HIREDATE SAL
---------- ---------- --------- --------- ----------
7788 SCOTT ANALYST 09-DEC-82 3000
7876 ADAMS CLERK 12-JAN-83 1100
7934 MILLER CLERK 23-JAN-82 1300
14 rows selected.
SQL>
これが2番目の表です
SQL> select * from dept;
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL>