Join table using : USING « Table Joins « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. Table Joins
3. USING

SQL> create table emp
  2  ( empno      NUMBER(4)    constraint E_PK primary key
  3  , ename      VARCHAR2(8)
  4  , init       VARCHAR2(5)
  5  , job        VARCHAR2(8)
  6  , mgr        NUMBER(4)
  7  , bdate      DATE
  8  , sal       NUMBER(6,2)
  9  , comm       NUMBER(6,2)
 10  , deptno     NUMBER(2)    default 10
 11  ) ;

Table created.

SQL> insert into emp values(1,'Tom','N',   'Coder', 13,date '1965-12-17',  800 , NULL,  20);

1 row created.

SQL> insert into emp values(2,'Jack','JAM', 'Tester',6,date '1961-02-20',  1600, 300,   30);

1 row created.

SQL> insert into emp values(3,'Wil','TF' ,  'Tester',6,date '1962-02-22',  1250, 500,   30);

1 row created.

SQL> insert into emp values(4,'Jane','JM',  'Designer', 9,date '1967-04-02',  2975, NULL,  20);

1 row created.

SQL> insert into emp values(5,'Mary','P',  'Tester',6,date '1956-09-28',  1250, 1400,  30);

1 row created.

SQL> insert into emp values(6,'Black','R',   'Designer', 9,date '1963-11-01',  2850, NULL,  30);

1 row created.

SQL> insert into emp values(7,'Chris','AB',  'Designer', 9,date '1965-06-09',  2450, NULL,  10);

1 row created.

SQL> insert into emp values(8,'Smart','SCJ', 'Coder', 4,date '1959-11-26',  3000, NULL,  20);

1 row created.

SQL> insert into emp values(9,'Peter','CC',   'Designer',NULL,date '1952-11-17',  5000, NULL,  10);

1 row created.

SQL> insert into emp values(10,'Take','JJ', 'Tester',6,date '1968-09-28',  1500, 0,     30);

1 row created.

SQL> insert into emp values(11,'Ana','AA',  'Coder', 8,date '1966-12-30',  1100, NULL,  20);

1 row created.

SQL> insert into emp values(12,'Jane','R',   'Manager',   6,date '1969-12-03',  800 , NULL,  30);

1 row created.

SQL> insert into emp values(13,'Fake','MG',   'Coder', 4,date '1959-02-13',  3000, NULL,  20);

1 row created.

SQL> insert into emp values(14,'Mike','TJA','Manager',   7,date '1962-01-23',  1300, NULL,  10);

1 row created.

SQL> create table history
  2  ( empno      NUMBER(4)
  3  , beginyear  NUMBER(4)
  4  , begindate  DATE
  5  , enddate    DATE
  6  , deptno     NUMBER(2)
  7  , sal       NUMBER(6,2)
  8  , comments   VARCHAR2(60)
  9  , constraint H_PK         primary key(empno,begindate)
 10  , constraint H_BEG_END    check      (begindate < enddate)
 11  ) ;

Table created.

SQL>
SQL>
SQL> alter session  set NLS_DATE_FORMAT='DD-MM-YYYY';

Session altered.

SQL>
SQL> insert into history values (1,2000,'01-01-2000','01-02-2000',40, 950,'');

1 row created.

SQL> insert into history values (1,2000,'01-02-2000', NULL       ,20, 800,'restarted');

1 row created.

SQL> insert into history values (2,2009,'01-11-2009', NULL       ,30,1600,'just hired');

1 row created.

SQL> insert into history values (3,1987,'01-08-1987','01-01-1989',30,1000,'On training');

1 row created.

SQL> insert into history values (3,2000,'01-02-2000', NULL       ,30,1250,'');

1 row created.

SQL>
SQL> select e.ename, e.bdate
  2  ,      h.deptno, h.sal
  3  from   emp e
  4         join
  5         history h
  6         using (empno)
  7  where  e.job = 'Manager';

no rows selected

SQL>
SQL> drop table history;

Table dropped.

SQL> drop table emp;

Table dropped.