Renaming a column with a longer name : Query Select Columns « Select Query « Oracle PL / SQL

1. Oracle PL / SQL
2. Select Query
3. Query Select Columns

Renaming a column with a longer name

   
SQL>
SQL> create table emp
  2  ( empno      NUMBER(4)    constraint E_PK
  3                            primary key
  4  , ename      VARCHAR2(8)
  5  , init       VARCHAR2(5)
  6  , job        VARCHAR2(8)
  7  , mgr        NUMBER(4)
  8  , bdate      DATE
  9  , sal       NUMBER(6,2)
 10  , comm       NUMBER(6,2)
 11  , deptno     NUMBER(2)    default 10
 12  ) ;

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>
SQL> select ename, init, sal salary
  2  from   emp
  3  where  deptno = 30;

ENAME    INIT      SALARY
-------- ----- ----------
Jack     JAM         1600
Wil      TF          1250
Mary     P           1250
Black    R           2850
Take     JJ          1500
Jane     R            800

6 rows selected.

SQL>
SQL> drop table emp;

Table dropped.

   
    
    
  

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