Retrieving All Columns from a Table

To retrieve all columns in a table, use the asterisk character (*) in place of a list of columns.


CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
                      ENAME VARCHAR2(10),
                      HIREDATE DATE);

INSERT INTO EMP VALUES (1, 'SMITH', TO_DATE('17-DEC-1980', 'DD-MON-YYYY'));
INSERT INTO EMP VALUES (2, 'ALLEN', TO_DATE('20-FEB-1981', 'DD-MON-YYYY'));
INSERT INTO EMP VALUES (3, 'WARD',  TO_DATE('22-FEB-1981', 'DD-MON-YYYY'));
INSERT INTO EMP VALUES (4, 'JONES', TO_DATE('2-APR-1981',  'DD-MON-YYYY'));
INSERT INTO EMP VALUES (5, 'MARTIN',TO_DATE('28-SEP-1981', 'DD-MON-YYYY'));

SQL> SELECT * FROM emp;

     EMPNO ENAME      HIREDATE
---------- ---------- ---------
         1 SMITH      17-DEC-80
         2 ALLEN      20-FEB-81
         3 WARD       22-FEB-81
         4 JONES      02-APR-81
         5 MARTIN     28-SEP-81

SQL>
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Simple Select:
  1. Simple select statement
  2. Retrieve date type information from a table
  3. Retrieving All Columns from a Table
  4. ROWID:Row Identifiers
  5. ROWNUM:Row Numbers
  6. Arithmetic calculation
  7. Date Arithmetic
  8. Column Arithmetic
  9. Column Aliases
  10. Combining Column Using Concatenation
  11. distinct rows
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