如何從嵌套查詢的結果中排除名稱？

Question

以下是我的僱員表：

create table EMPLOYEES 
(EmpID char(4)   unique Not null, 
Ename varchar(10), 
Job  varchar(9), 
MGR  char(4), 
Hiredate date, 
Salary decimal(7,2), 
Comm  decimal(7,2), 
DeptNo char(2)   not null, 
    Primary key(EmpID), 
    Foreign key(DeptNo) REFERENCES DEPARTMENTS(DeptNo)); 


insert into EMPLOYEES values (7839,'King','President',null,'17-Nov-11',5000,null,10); 
insert into EMPLOYEES values (7698,'Blake','Manager',7839,'01-May-11',2850,null,30); 
insert into EMPLOYEES values (7782,'Clark','Manager',7839,'02-Jun-11',2450,null,10); 
insert into EMPLOYEES values (7566,'Jones','Manager',7839,'02-Apr-11',2975,null,20); 
insert into EMPLOYEES values (7654,'Martin','Salesman',7698,'28-Feb-12',1250,1400,30); 
insert into EMPLOYEES values (7499,'Allen','Salesman',7698,'20-Feb-11',1600,300,30); 
insert into EMPLOYEES values (7844,'Turner','Salesman',7698,'08-Sep-11',1500,0,30); 
insert into EMPLOYEES values (7900,'James','Clerk',7698,'22-Feb-12',950,null,30); 
insert into EMPLOYEES values (7521,'Ward','Salesman',7698,'22-Feb-12',1250,500,30); 
insert into EMPLOYEES values (7902,'Ford','Analyst',7566,'03-Dec-11',3000,null,20); 
insert into EMPLOYEES values (7369,'Smith','Clerk',7902,'17-Dec-10',800,null,20); 
insert into EMPLOYEES values (7788,'Scott','Analyst',7566,'09-Dec-12',3000,null,20); 
insert into EMPLOYEES values (7876,'Adams','Clerk',7788,'12-Jan-10',1100,null,20); 
insert into EMPLOYEES values (7934,'Miller','Clerk',7782,'23-Jan-12',1300,null,10); 

以下是部門表：

create table DEPARTMENTS 
    (DeptNo char(2) unique Not null, 
    DName varchar(14), 
    Location varchar(13), 
     Primary key(DeptNo)); 


insert into DEPARTMENTS values (10,'Accounting','New York'); 
insert into DEPARTMENTS values (20,'Research','Dallas'); 
insert into DEPARTMENTS Values (30,'Sales','Chicago'); 
insert into DEPARTMENTS values (40,'Operations','Boston'); 

以下是我的查詢：

select ename, salary 
from EMPLOYEES 
where DeptNo in 
(select DeptNo 
from EMPLOYEES 
where Ename ='blake'); 

如何排除 '布萊克'從我的結果？我被告知在子查詢中使用NOT IN，但它不起作用。

Answer 1

select ename, salary 
from EMPLOYEES 
where DeptNo in 
(select DeptNo 
from EMPLOYEES 
where Ename ='blake') and Ename <>'blake'; 

您也可以使用not in作爲第二個查詢。

SQLFIDDLE DEMO