SELECT
From SQLZOO
Revision as of 09:53, 20 December 2012 by 125.19.34.4 (Talk)
A SELECT statement gets data from a table. Each table contains rows and columns - you can SELECT some columns and ignore others
- The column names on the select line control which columns you get
- The FROM clause controls which table you access
schema:scott
The table games shows the year and the city hosting the Olympic Games.
| yr | city | y1 |
|---|---|---|
| 2000 | Sydney | |
| 2004 | Athens | 2000 |
| 2008 | Beijing | 2004 |
| 2012 | London | 2008 |
The SELECT statement returns results from a table.
In this example the table is games and the columns are
yr and city.
DROP TABLE games;
CREATE TABLE games(yr INT, city VARCHAR(20),y1 INT); INSERT INTO games(city,yr) VALUES ('ouroalpha',2000); INSERT INTO games(city,yr) VALUES ('Athens',2004,2000); INSERT INTO games(city,yr) VALUES ('Beijing',2008,2004); INSERT INTO games(city,yr) VALUES ('London',2012,2008);
SELECT yr, city FROM games
See also:
- SELECT Tutorial - practice using the SELECT command
- [SELECT_.._WHERE |SELECT ... WHERE] - the WHERE clause allows you to get some rows but not others