You don't need to know the column names to select data from a table.
By placing an asterisk (*) in the SELECT
clause, all columns of the
table identified in the FROM
clause will be displayed. This is an
alternative to listing all the column names in the SELECT
clause.
Example: Let's look at all the data stored in the REPORT table.
If you enter the statement
SELECT *
FROM REPORT ;
the result displayed on the screen will be
TITLE AUTHOR DEPT FILENAME ... Disappearing Ink Jackson, Herbert RND /docs/rnd/ink.txt ... Ink Promotional Campaign Sanchez, Carla MKT /docs/mkt/promo.rpt ... Budget for 4Q 92 Price, Stella FIN /docs/ad/4q.rpt ... Round Widgets Smith, Roberta RND /docs/rnd/widg.txt ... Paperclips Aster, John A. MKT /docs/mkt/clip.rpt ... Color Panorama Jackson, Herbert RND /docs/rnd/color.txt ... Meeting Schedule Barrington, Kyle MGT /docs/mgt/when.rpt |