Difference between revisions of "CREATE TABLE"

From SQLZOO
Jump to: navigation, search
(Created page with " <h1>CREATE TABLE</h1> <p>The table <code>games</code> shows the year and the city hosting the Olympic Games.</p> <table> <caption align='center'>games</caption> <tr><th align...")
 
Line 11: Line 11:
 
<div class=params>schema:scott</div>
 
<div class=params>schema:scott</div>
 
<source lang=sql class='tidy'> DROP TABLE games</source>
 
<source lang=sql class='tidy'> DROP TABLE games</source>
The SELECT statement returns results from a <i>table</i>.
+
The CREATE statement builds an empty table to hold rows.
With a WHERE clause only some rows are returned.  
+
In this example the column yr is the PRIMARY KEY:
This example shows the year that Athens hosted the Olympic games.
+
 
<source lang='sql' class='def e-oracle'>
 
<source lang='sql' class='def e-oracle'>
 
CREATE TABLE games
 
CREATE TABLE games

Revision as of 12:35, 17 July 2012

CREATE TABLE

The table games shows the year and the city hosting the Olympic Games.

games
yrcity
2004Athens
2008Beijing
schema:scott
 DROP TABLE games

The CREATE statement builds an empty table to hold rows. In this example the column yr is the PRIMARY KEY:

CREATE TABLE games
(yr   INT NOT NULL PRIMARY KEY
,city VARCHAR(20)
);
INSERT INTO games(yr,city) VALUES (2004,'Athens');
INSERT INTO games(yr,city) VALUES (2008,'Beijing');
SELECT * FROM games;
CREATE TABLE games
(yr   INT NOT NULL PRIMARY KEY
,city VARCHAR(20)
);
INSERT INTO games(yr,city) VALUES (2004,'Athens');
INSERT INTO games(yr,city) VALUES (2008,'Beijing');
SELECT * FROM games;

See also

Personal tools
Namespaces

Variants
Actions
Reference
Toolbox
Google AdSense