Reference column name from renamed table name
SQL>
SQL>
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>
SQL> create table departments
2 ( deptno NUMBER(2) constraint D_PK primary key
3 , dname VARCHAR2(10)
4 , location VARCHAR2(8)
5 , mgr NUMBER(4)
6 ) ;
Table created.
SQL>
SQL> insert into departments values (10,'ACCOUNTING','NEW YORK',7);
1 row created.
SQL> insert into departments values (20,'TRAINING', 'DALLAS', 4);
1 row created.
SQL> insert into departments values (30,'SALES', 'CHICAGO', 6);
1 row created.
SQL> insert into departments values (40,'HR', 'BOSTON', 9);
1 row created.
SQL>
SQL>
SQL> select d.deptno, d.location, e.ename, e.init
2 from emp e, departments d;
DEPTNO LOCATION ENAME INIT
---------- -------- -------- -----
10 NEW YORK Tom N
10 NEW YORK Jack JAM
10 NEW YORK Wil TF
10 NEW YORK Jane JM
10 NEW YORK Mary P
10 NEW YORK Black R
10 NEW YORK Chris AB
10 NEW YORK Smart SCJ
10 NEW YORK Peter CC
10 NEW YORK Take JJ
10 NEW YORK Ana AA
10 NEW YORK Jane R
10 NEW YORK Fake MG
10 NEW YORK Mike TJA
20 DALLAS Tom N
20 DALLAS Jack JAM
20 DALLAS Wil TF
20 DALLAS Jane JM
20 DALLAS Mary P
DEPTNO LOCATION ENAME INIT
---------- -------- -------- -----
20 DALLAS Black R
20 DALLAS Chris AB
20 DALLAS Smart SCJ
20 DALLAS Peter CC
20 DALLAS Take JJ
20 DALLAS Ana AA
20 DALLAS Jane R
20 DALLAS Fake MG
20 DALLAS Mike TJA
30 CHICAGO Tom N
30 CHICAGO Jack JAM
30 CHICAGO Wil TF
30 CHICAGO Jane JM
30 CHICAGO Mary P
30 CHICAGO Black R
30 CHICAGO Chris AB
30 CHICAGO Smart SCJ
30 CHICAGO Peter CC
30 CHICAGO Take JJ
DEPTNO LOCATION ENAME INIT
---------- -------- -------- -----
30 CHICAGO Ana AA
30 CHICAGO Jane R
30 CHICAGO Fake MG
30 CHICAGO Mike TJA
40 BOSTON Tom N
40 BOSTON Jack JAM
40 BOSTON Wil TF
40 BOSTON Jane JM
40 BOSTON Mary P
40 BOSTON Black R
40 BOSTON Chris AB
40 BOSTON Smart SCJ
40 BOSTON Peter CC
40 BOSTON Take JJ
40 BOSTON Ana AA
40 BOSTON Jane R
40 BOSTON Fake MG
40 BOSTON Mike TJA
56 rows selected.
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL> drop table departments;
Table dropped.
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