Difference between revisions of "SELECT"
From SQLZOO
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| + | 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 | ||
<div class=params>schema:scott</div> | <div class=params>schema:scott</div> | ||
The table <code>games</code> shows the year and the city hosting the Olympic Games. | The table <code>games</code> shows the year and the city hosting the Olympic Games. | ||
Revision as of 20:38, 17 May 2012
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 |
|---|---|
| 2000 | Sydney |
| 2004 | Athens |
| 2008 | Beijing |
| 2012 | London |
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)); INSERT INTO games(city,yr) VALUES ('Sydney',2000); INSERT INTO games(city,yr) VALUES ('Athens',2004); INSERT INTO games(city,yr) VALUES ('Beijing',2008); INSERT INTO games(city,yr) VALUES ('London',2012);
SELECT yr, city FROM games
