Oracle下SQL基本操作(三)(7)

SELECT EMP.DEPTID, AVG(EMP.SALARY)   FROM EMPLOYEE EMP
WHERE  EMP.QUALID = '1'
GROUP BY EMP.DEPTID
----统计每种学位的平均工资
SELECT  EMP.QUALID,AVG(EMP.SALARY)    FROM EMPLOYEE EMP
GROUP BY EMP.QUALID
---统计每个部门的总年薪
SELECT  EMP.DEPTID,SUM(COALESCE(EMP.SALARY + EMP.COMMISSION, EMP.SALARY,EMP.COMMISSION,0)) * 12 总年薪  FROM EMPLOYEE EMP
GROUP BY EMP.DEPTID
SELECT * FROM EMPLOYEE;
---统计每个部门 员工资金大于1000 的最小工资 再按
  SELECT EMP.DEPTID ,MIN(EMP.SALARY)   最小工资
   FROM  EMPLOYEE EMP
   WHERE EMP.COMMISSION > 1000
   GROUP BY EMP.DEPTID
 ---  ORDER BY 最小工资 desc;
 
 ----员工姓名 部门名 
 SELECT     EMP.NAME,DEP.DEPTNAME
       FROM EMPLOYEE EMP,DEPARTMENT  DEP
       WHERE  EMP.DEPTID = DEP.DEPTID 
      
----员工姓名 学位名
SELECT   EMP.NAME,QUA.QUALNAME
      FROM EMPLOYEE EMP,QUAFICATION QUA
      WHERE EMP.QUALID = QUA.QUALID     
 
-----SQL 1999新连接标准
SELECT EMP.EMPLOYEEID, DEPT.DEPTID
  FROM EMPLOYEE EMP
  CROSS JOIN DEPTMENT DEPT;
 
SELECT EMP.EMPLOYEEID, DEPTID
  FROM EMPLOYEE EMP
  NATURAL JOIN DEPTMENT DEPT;
SELECT EMP.EMPLOYEEID, DEPTID
  FROM EMPLOYEE EMP
  JOIN DEPTMENT DEPT USING (DEPTID);
 

----教学部的员工姓名 ,学位名,工资等级    SELECT * FROM EMPLOYEE;  
--- SELECT * FROM EMPLOYEE FOR UPDATE
SELECT  EMP.NAME,QUA.QUALNAME, LEV.LEVELNO,QUA.QUALID
       FROM EMPLOYEE EMP, QUAFICATION QUA, EMPLEVEL LEV , DEPARTMENT DEP
       WHERE  DEP.DEPTNAME = '教学部'
       AND EMP.QUALID = QUA.QUALID
       AND EMP.SALARY BETWEEN LEV.LOWSALARY AND LEV.LOWSALARY;
      
  --不相关子查询
 
  ---薪水高于0004号员工的薪水的员工，他的ID
SELECT OUTEMP.EMPLOYEEID
  FROM EMPLOYEE OUTEMP
  WHERE OUTEMP.SALARY >
        (SELECT INEMP.SALARY
           FROM EMPLOYEE INEMP
           WHERE INEMP.EMPLOYEEID = '0004');