olcal数据库经典SQL语句大全

基于olacle自带的表

第一篇

-----1．列出至少有一个员工的所有部门。

oracle 一些经典sql第一篇

--------1．列出至少有一个员工的所有部门。--------- 

SQL> select dname from dept where deptno in(select deptno from emp);

SQL> select dname from dept where deptno in(select deptno from emp group by
deptno having count(deptno) >=1); 

--------2．列出薪金比“SMITH”多的所有员工。---------- 


SQL> select * from emp where sal > (select sal from emp where ename =
'SMITH'); 

--------3．列出所有员工的姓名及其直接上级的姓名。---------- 

SQL> select a.ename,(select ename from emp b where b.empno=a.mgr) as
boss_name from emp a;  

--------4．列出受雇日期早于其直接上级的所有员工。---------- 

SQL> select a.ename from emp a where a.hiredate<(select hiredate from emp
b where b.empno=a.mgr);  

--------5．列出部门名称和这些部门的员工信息，同时列出那些没有员工的部门---------- 


SQL> select
a.dname,b.empno,b.ename,b.job,b.mgr,b.hiredate,b.sal,b.deptno 

     from dept a left join emp b on
a.deptno=b.deptno; 

--------6．列出所有“CLERK”（办事员）的姓名及其部门名称。---------- 

SQL> select a.ename,b.dname from emp a join dept b on a.deptno=b.deptno and
a.job='CLERK'; 

--------7．列出最低薪金大于1500的各种工作。---------- 


SQL> select distinct job as HighSalJob from emp group by job having
min(sal)>1500;  

--------8．列出在部门“SALES”（销售部）工作的员工的姓名，假定不知道销售部的部门编号。---------- 

SQL> select ename from emp where deptno=(select deptno from dept where
dname='SALES');  

--------9．列出薪金高于公司平均薪金的所有员工。---------- 

SQL> select ename from emp where sal>(select avg(sal) from
emp);  

--------10．列出与“SCOTT”从事相同工作的所有员工。-------- 

SQL> select ename from emp where job=(select job from emp where
ename='SCOTT'); 



--------11．列出薪金等于部门30中员工的薪金的所有员工的姓名和薪金。--------- 

SQL> select a.ename,a.sal from emp a where a.sal in (select b.sal 

     from emp b where b.deptno=30) and
a.deptno$amp;<amp;$gt;30;  

--------12．列出薪金高于在部门30工作的所有员工的薪金的员工姓名和薪金。--------- 

SQL> select ename,sal from emp where sal>(select max(sal) from emp where
deptno=30);  



--------13．列出在每个部门工作的员工数量、平均工资和平均服务期限。--------- 

SQL> select (select b.dname from dept b where a.deptno=b.deptno) as deptname
,count(deptno) as deptcount,avg(sal) as deptavgsal 

    from emp a group by deptno;    

--------14．列出所有员工的姓名、部门名称和工资。--------- 

SQL> select a.ename,(select b.dname from dept b where b.deptno=a.deptno) as
deptname,sal from emp a;

--------15．列出所有部门的详细信息和部门人数。--------- 

SQL> select a.deptno,a.dname,a.loc,(select count(deptno) from emp b where
b.deptno=a.deptno group by b.deptno) as deptcount from dept a;  

  --------16．列出各种工作的最低工资。--------- 

SQL> select job,avg(sal) from emp group by job; 

--------17．列出各个部门的MANAGER（经理）的最低薪金。-------- 

SQL> select deptno,min(sal) from emp where job='MANAGER' group by deptno;

--------18．列出所有员工的年工资,按年薪从低到高排序。--------- 

SQL> select ename,(sal+nvl(comm,0))*12 as salpersal from emp order by
salpersal; 



第二篇

--------1. 找出EMP表中的姓名（ENAME）第三个字母是A 的员工姓名。--------- 

SQL> SELECT ENAME FROM SCOTT.EMP WHERE ENAME LIKE '__A%'; 

-------2. 找出EMP表员工名字中含有A 和N的员工姓名。---------- 

SQL> SELECT ENAME FROM SCOTT.EMP WHERE ENAME LIKE '%A%' AND ENAME LIKE
'%N%';

--------3. 找出所有有佣金的员工，列出姓名、工资、佣金，显示结果按工资从小到大，佣金从大到小。----------

SQL> SELECT ENAME,SAL + COMM AS WAGE,COMM 

    FROM SCOTT.EMP 

    ORDER BY WAGE,COMM DESC; 

-------4. 列出部门编号为20的所有职位。---------- 


SQL> SELECT DISTINCT JOB FROM EMP WHERE DEPTNO = 20; 

-------5. 列出不属于SALES 的部门。---------- 


SQL> SELECT DISTINCT * FROM SCOTT.DEPT WHERE DNAME $amp;

或者

SQL> SELECT DISTINCT * FROM SCOTT.DEPT WHERE DNAME != 'SALES'; 

SQL> SELECT DISTINCT * FROM SCOTT.DEPT WHERE DNAME NOT IN('SALES'); 

SQL> SELECT DISTINCT * FROM SCOTT.DEPT WHERE DNAME NOT LIKE 'SALES';

---6. 显示工资不在1000 到1500 之间的员工信息：名字、工资，按工资从大到小排序。--------- 

SQL> SELECT ENAME,SAL + COMM AS WAGE FROM SCOTT.EMP 

    WHERE SAL + COMM NOT BETWEEN 1000 AND 1500 

    ORDER BY WAGE DESC; 

--或者 

SQL> SELECT ENAME,SAL + COMM AS WAGE FROM SCOTT.EMP 

  2  WHERE SAL + COMM < 1000 OR SAL + COMM > 1500 

  3  ORDER BY WAGE DESC; 

 

  /*----- 7. 显示职位为MANAGER 和SALESMAN，年薪在15000 和20000
之间的员工的信息：名字、职位、年薪。----------*/ 

SQL> SELECT ENAME 姓名,JOB 职位,(SAL
+ COMM) * 12 AS 年薪 

  2  FROM SCOTT.EMP 

  3  WHERE (SAL + COMM) * 12 BETWEEN 15000 AND 20000 

  4  AND JOB IN('MANAGER','SALESMAN');

 

  /*----- 8. 说明以下两条SQL语句的输出结果： 

    SELECT EMPNO,COMM FROM EMP WHERE COMM IS NULL; 

    SELECT EMPNO,COMM FROM EMP WHERE COMM = NULL; 

--说明：IS NULL是判断某个字段是否为空，为空并不等价于为空字符串或为数字0； 

--而 =NULL 是判断某个值是否等于 NULL，NULL = NULL和NULL $amp;



第三篇



/*--------1、改变NLS_LANG 的值，让SELECT
TO_CHAR(SALARY,'L99,999.99') FROM HR.EMPLOYEES WHERE ROWNUM < 5 输出结果的货币单位是￥和$。---------*/ 

-----在没有设置NLS_LANG的情况下： 



SQL> SELECT TO_CHAR(SALARY,'L99,999.99') 

     FROM HR.EMPLOYEES 

     WHERE ROWNUM < 5; 

  

   /*--------2、列出前五位每个员工的名字，工资、涨薪后的的工资（涨幅为8%），以“元”为单位进行四舍五入。---------*/ 




SQL> SELECT FIRST_NAME,SALARY,ROUND(SALARY * 1.08) FROM HR.EMPLOYEES 

     WHERE ROWNUM <=5; 

    

/*--------3、找出谁是最高领导，将名字按大写形式显示。---------*/ 

SQL> SELECT UPPER(FIRST_NAME || ' ' || LAST_NAME) AS NAME

     FROM HR.EMPLOYEES 

     WHERE MANAGER_ID IS NULL; 

/*--------4、找出David 的直接领导的名字。---------*/ 


SQL> SELECT UPPER(FIRST_NAME ||' ' || LAST_NAME) AS NAME

     FROM HR.EMPLOYEES 

     WHERE EMPLOYEE_ID IN( 

     SELECT MANAGER_ID FROM HR.EMPLOYEES 

     WHERE FIRST_NAME = 'David' AND LAST_NAME =
'Austin');       

/*--------5、First_Name 为Alexander，LAST_NAME为Hunold领导谁。（谁向David 报告）。---------*/ 

SQL> SELECT UPPER(FIRST_NAME ||' ' || LAST_NAME) AS NAME

     FROM HR.EMPLOYEES 

     WHERE MANAGER_ID IN( 

     SELECT EMPLOYEE_ID FROM HR.EMPLOYEES 

     WHERE FIRST_NAME = 'Alexander' AND LAST_NAME =
'Hunold'); 

    

/*--------6、哪些员工的工资高于他直接上司的工资，列出员工的名字和工资，上司的名字和工资。---------*/ 




SQL> SELECT E.FIRST_NAME,E.SALARY,M.FIRST_NAME,M.SALARY 

    FROM EMPLOYEES E,EMPLOYEES M 

    WHERE E.MANAGER_ID = M.EMPLOYEE_ID AND E.SALARY >
M.SALARY; 



--要是只列出员工的名字与工资的话，还可以这样： 



SQL> SELECT E.FIRST_NAME,E.SALARY 

   FROM EMPLOYEES E WHERE E.SALARY $amp;>amp;$nbsp;

  (SELECT M.SALARY FROM EMPLOYEES M  

   WHERE E.MANAGER_ID = M.EMPLOYEE_ID);

  /*--------7、哪些员工和Chen(LAST_NAME)同部门。---------*/ 



SQL> SELECT FIRST_NAME FROM EMPLOYEES 

  WHERE DEPARTMENT_ID IN

  (SELECT DEPARTMENT_ID FROM EMPLOYEES WHERE LAST_NAME = 'Chen') 

  AND LAST_NAME $amp;

  --或者-- 



SQL> SELECT E1.FIRST_NAME FROM EMPLOYEES E1,EMPLOYEES E2 

    WHERE E1.DEPARTMENT_ID = E2.DEPARTMENT_ID 

    AND E2.LAST_NAME = 'Chen' AND E1.LAST_NAME $amp;

  /*--------8、哪些员工跟De Haan(LAST_NAME)做一样职位。---------*/ 

SQL> SELECT FIRST_NAME FROM EMPLOYEES 

    WHERE JOB_ID IN

    (SELECT JOB_ID FROM EMPLOYEES 

    WHERE LAST_NAME = 'De Haan') 

    AND LAST_NAME $amp;

   --或者-- 



SQL> SELECT E1.FIRST_NAME FROM EMPLOYEES E1,EMPLOYEES E2 

    WHERE E1.JOB_ID = E2.JOB_ID  

    AND E2.LAST_NAME = 'De Haan' AND E1.LAST_NAME $amp;

  /*--------9、哪些员工跟Hall(LAST_NAME)不在同一个部门。---------*/ 



SQL> SELECT FIRST_NAME || ' ' || LAST_NAME FROM HR.EMPLOYEES 

    WHERE DEPARTMENT_ID NOT IN( 

    SELECT DEPARTMENT_ID FROM HR.EMPLOYEES 

    WHERE LAST_NAME = 'Hall'); 

  

   --或者： 



SQL> SELECT e1.FIRST_NAME FROM EMPLOYEES e1,EMPLOYEES e2 

    WHERE e1.DEPARTMENT_ID = e2.DEPARTMENT_ID(+) 

    and e2.LAST_NAME(+) = 'Hall'

    and e2.LAST_NAME IS NULL; 

  /*-------10、哪些员工跟William（FIRST_NAME）、Smith(LAST_NAME)做不一样的职位。--------*/ 



SQL> SELECT FIRST_NAME || ' ' || LAST_NAME FROM HR.EMPLOYEES 

    WHERE JOB_ID $amp;

    WHERE FIRST_NAME = 'William' AND LAST_NAME = 'Smith');  


/*--------11、显示有提成的员工的信息：名字、提成、所在部门名称、所在地区的名称。---------*/ 




SQL> SELECT E.FIRST_NAME || ' ' || E.LAST_NAME AS NAME, 

  E.COMMISSION_PCT,D.DEPARTMENT_NAME,L.CITY 

  FROM HR.EMPLOYEES E,HR.DEPARTMENTS D,HR.LOCATIONS L 

  WHERE E.DEPARTMENT_ID = D.DEPARTMENT_ID 

  AND D.LOCATION_ID = L.LOCATION_ID 

  AND E.COMMISSION_PCT IS NOT NULL; 



/*--------12、显示Executive部门有哪些职位。---------*/ 

SQL> SELECT DISTINCT E.JOB_ID FROM HR.EMPLOYEES E,HR.DEPARTMENTS D 

    WHERE D.DEPARTMENT_ID = E.DEPARTMENT_ID 

    AND D.DEPARTMENT_NAME = 'Executive'; 

  /*--------13、整个公司中，最高工资和最低工资相差多少。---------*/ 


SQL> SELECT MAX(SALARY) - MIN(SALARY) FROM HR.EMPLOYEES; 

/*--------14、提成大于0 的人数。---------*/ 


SQL> SELECT COUNT(*) AS 提成大小0的人数 FROM HR.EMPLOYEES 

    WHERE COMMISSION_PCT > 0; 

  --或者 



SQL> SELECT COUNT(COMMISSION_PCT) AS 提成大小0的人数   

     FROM HR.EMPLOYEES 

     WHERE COMMISSION_PCT > 0; 

  /*--------15、显示整个公司的最高工资、最低工资、工资总和、平均工资保留到整数位。---------*/ 




SQL> SELECT MAX(NVL(SALARY,0)) AS 最高工资, 

             MIN(NVL(SALARY,0))
AS 最低工资, 

            
SUM(NVL(SALARY,0)) AS 工资总和, 

            
ROUND(AVG(NVL(SALARY,0))) AS 平均工资 

    FROM HR.EMPLOYEES; 

  /*--------16、整个公司有多少个领导。---------*/ 

SQL> SELECT COUNT(DISTINCT(MANAGER_ID))  FROM HR.EMPLOYEES 

   2  WHERE MANAGER_ID IS NOT NULL; 

   /*--------17、列出在同一部门入职日期晚但工资高于其他同事的员工： 


名字、工资、入职日期。---------*/ 



SQL> SELECT DISTINCT E1.FIRST_NAME || ' ' || E1.LAST_NAME AS 姓名, 

          E1.SALARY AS 工资,E1.HIRE_DATE AS 入职日期 

   FROM HR.EMPLOYEES E1,HR.EMPLOYEES E2 

   WHERE E1.DEPARTMENT_ID = E2.DEPARTMENT_ID 

   AND E1.HIRE_DATE > E2.HIRE_DATE 

   AND E1.SALARY > E2.SALARY 

   ORDER BY 工资 DESC; 

第四篇

/*--------1、各个部门平均、最大、最小工资、人数，按照部门号升序排列。---------*/ 


SQL> SELECT DEPARTMENT_ID AS 部门号,AVG(SALARY) AS 平均工资 

           ,MAX(SALARY) AS 最高工资,MIN(SALARY)  AS 最低工资 

           ,COUNT(*) AS 人数 

    FROM EMPLOYEES 

    GROUP BY DEPARTMENT_ID 

    ORDER BY DEPARTMENT_ID ASC; 

  /*--------2、各个部门中工资大于5000的员工人数。---------*/ 

SQL> SELECT DEPARTMENT_ID,COUNT(*) FROM EMPLOYEES 

     WHERE SALARY > 5000 

     GROUP BY DEPARTMENT_ID; 

   /*--------3、各个部门平均工资和人数，按照部门名字升序排列。---------*/ 




SQL> SELECT DPTNAME,AVG(SALARY),COUNT(*) FROM

          (SELECT

             
(SELECT DEPT.DEPARTMENT_NAME FROM DEPARTMENTS DEPT 

             
WHERE DEPT.DEPARTMENT_ID = EMP.DEPARTMENT_ID) DPTNAME, 

             
EMP.SALARY 

   FROM EMPLOYEES EMP) 

   GROUP BY DPTNAME 

   ORDER BY DPTNAME; 

  --或者-- 



SQL> SELECT DEPT.DEPARTMENT_NAME,AVG(EMP.SALARY),COUNT(*) 

     FROM EMPLOYEES EMP,DEPARTMENTS DEPT 

     WHERE EMP.DEPARTMENT_ID = DEPT.DEPARTMENT_ID 

     GROUP BY DEPT.DEPARTMENT_NAME 

     ORDER BY DEPT.DEPARTMENT_NAME; 

   /*--------4、列出每个部门中有同样工资的员工的统计信息， 

  列出他们的部门号，工资，人数。---------*/ 



SQL> SELECT EMP1.DEPARTMENT_ID,EMP1.SALARY,COUNT(*) CNT 

    FROM   EMPLOYEES EMP1,EMPLOYEES EMP2 

    WHERE  EMP1.DEPARTMENT_ID = EMP2.DEPARTMENT_ID AND

            EMP1.SALARY
= EMP2.SALARY 

            AND
EMP1.EMPLOYEE_ID $amp;

    GROUP BY EMP1.DEPARTMENT_ID,EMP1.SALARY; 

   /*--------5、列出同部门中工资高于1000 的员工数量超过2 人的部门， 

显示部门名字、地区名称。---------*/ 



SQL> SELECT D.DEPARTMENT_NAME,L.CITY,COUNT(*) 

    FROM EMPLOYEES E,DEPARTMENTS D,LOCATIONS L 

    WHERE E.DEPARTMENT_ID = D.DEPARTMENT_ID AND

          
D.LOCATION_ID   = L.LOCATION_ID    AND

           E.SALARY >
1000 

    GROUP BY D.DEPARTMENT_NAME,L.CITY 

    HAVING COUNT(*) > 2; 

   /*--------6、哪些员工的工资，高于整个公司的平均工资， 

  列出员工的名字和工资（降序）。---------*/ 



SQL> SELECT FIRST_NAME || ' ' || LAST_NAME,SALARY 

   FROM EMPLOYEES 

   WHERE SALARY > ( 

         SELECT AVG(SALARY) 

         FROM EMPLOYEES 

         ) 

   ORDER BY SALARY DESC;  

  

   /*--------7、哪些员工的工资，介于50号 和80号 部门平均工资之间。---------*/ 



SQL> SELECT FIRST_NAME || ' ' || LAST_NAME AS NAME,SALARY 

    FROM EMPLOYEES 

    WHERE SALARY 

    BETWEEN

        (SELECT AVG(SALARY) FROM
EMPLOYEES 

         WHERE DEPARTMENT_ID =
50) 

    AND (SELECT AVG(SALARY) FROM EMPLOYEES 

         WHERE DEPARTMENT_ID =
80); 

  /*--------8、所在部门平均工资高于5000 的员工名字。---------*/ 



SQL> SELECT FIRST_NAME || ' ' || LAST_NAME AS NAME,SALARY 

    FROM EMPLOYEES 

    WHERE DEPARTMENT_ID IN

          (SELECT DEPARTMENT_ID
FROM EMPLOYEES 

           GROUP BY
DEPARTMENT_ID 

           HAVING AVG(SALARY)
> 5000); 

   /*--------9、列出各个部门中工资最高的员工的信息：名字、部门号、工资。---------*/ 




SQL> SELECT FIRST_NAME || ' ' || LAST_NAME AS NAME

         
,SALARY,DEPARTMENT_ID 

   FROM EMPLOYEES 

   WHERE (DEPARTMENT_ID,SALARY) IN

         (SELECT
DEPARTMENT_ID,MAX(SALARY) 

          FROM EMPLOYEES 

          GROUP BY DEPARTMENT_ID);  


  

   /*--------10、最高的部门平均工资是多少。---------*/ 


SQL> SELECT MAX(AVGSALARY) 

   FROM(SELECT DEPARTMENT_ID,AVG(SALARY) AVGSALARY 

     FROM EMPLOYEES 

     GROUP BY
DEPARTMENT_ID);     </amp;$gt;30;  >