not exists subquery
SQL>
SQL>
SQL>
SQL> create table gift(
2 gift_id integer primary key
3 ,emp_id integer
4 ,register_date date not null
5 ,total_price number(7,2)
6 ,deliver_date date
7 ,deliver_time varchar2(7)
8 ,payment varchar2(2)
9 ,emp_no number(3,0)
10 ,deliver_name varchar2(35)
11 ,message varchar2(100)
12 );
Table created.
SQL>
SQL> insert into gift(gift_id,emp_id,register_date,total_price,deliver_date,deliver_time,payment,emp_no,deliver_name,message)values
2 (1,1,'14-Feb-1999', 123.12, '14-Feb-1999', '12 noon', 'CA',1, null, 'Happy Birthday to you');
1 row created.
SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time ,payment ,emp_no,deliver_name ,message)values
2 (2,1,'14-Feb-1999', 50.98, '14-feb-1999', '1 pm', 'CA',7, 'name1', 'Happy Birthday');
1 row created.
SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time,payment ,emp_no,deliver_name ,message )values
2 (3, 2,'14-Feb-1999', 35.99, '14-feb-1999', '1 pm', 'VS',2, 'Tom', 'Happy Birthday');
1 row created.
SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time,payment ,emp_no,deliver_name ,message )values
2 (4, 2,'14-Feb-1999', 19.95, '14-feb-1999', '5 pm', 'CA',2, 'Mary', 'Happy Birthday');
1 row created.
SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time,payment ,emp_no,deliver_name ,message)values
2 (5, 6,'4-mar-1999', 10.95, '5-mar-1999', '4:30 pm', 'VS', 2, 'Jack', 'Happy Birthday');
1 row created.
SQL>
SQL> create table emp(
2 emp_id integer primary key
3 ,lastname varchar2(20) not null
4 ,firstname varchar2(15) not null
5 ,midinit varchar2(1)
6 ,street varchar2(30)
7 ,city varchar2(20)
8 ,state varchar2(2)
9 ,zip varchar2(5)
10 ,shortZipCode varchar2(4)
11 ,area_code varchar2(3)
12 ,phone varchar2(8)
13 ,company_name varchar2(50));
Table created.
SQL>
SQL>
SQL> insert into emp(emp_id,lastname,firstname,midinit,street,city,state,zip,shortZipCode,area_code,phone,company_name)values
2 (1,'Jones','Joe','J','1 Ave','New York','NY','11202','1111','212', '221-4333','Big Company');
1 row created.
SQL> insert into emp(emp_id,lastname,firstname,midinit,street,city,state,zip,shortZipCode,area_code,phone,company_name)values
2 (2,'Smith','Sue','J','1 Street','New York','NY','11444','1111','212', '436-6773','Little Company');
1 row created.
SQL> insert into emp(emp_id,lastname,firstname,midinit,street,city,state,zip,shortZipCode,area_code,phone,company_name)values
2 (3,'X','Peggy','J','1 Drive','New York','NY','45502','2222','212', '234-4444','Medium Company');
1 row created.
SQL>
SQL> select emp_id, lastname
2 from emp c
3 where not exists
4 (select * from gift o where o.emp_id = c.emp_id);
EMP_ID LASTNAME
---------- --------------------
3 X
SQL>
SQL> drop table emp;
Table dropped.
SQL> drop table gift;
Table dropped.
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