Difference between revisions of "SELECT .. WHERE"

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Line 11: Line 11:
 
</table>
 
</table>
 
<div class='ht'>
 
<div class='ht'>
<div class=params>schema:gisq</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>
 
<source lang=sql class='setup'> CREATE TABLE games(
 
<source lang=sql class='setup'> CREATE TABLE games(
 
   yr INTEGER PRIMARY KEY,
 
   yr INTEGER PRIMARY KEY,
   city VARCHAR(10));
+
   city VARCHAR(20));
INSERT INTO games VALUES (2000,Sydney);
+
INSERT INTO games VALUES (2000,'Sydney');
INSERT INTO games VALUES (2004,Athens);
+
INSERT INTO games VALUES (2004,'Athens');
INSERT INTO games VALUES (2008,Beijing);
+
INSERT INTO games VALUES (2008,'Beijing');
INSERT INTO games VALUES (2012,London);
+
INSERT INTO games VALUES (2012,'London');
 
</source>
 
</source>
 
The SELECT statement returns results from a <i>table</i>.  
 
The SELECT statement returns results from a <i>table</i>.  
Line 26: Line 26:
 
<source lang='sql' class='def e-oracle'>
 
<source lang='sql' class='def e-oracle'>
 
SELECT yr, city  
 
SELECT yr, city  
FROM gisq.games
+
FROM scott.games
 
WHERE yr = 2004
 
WHERE yr = 2004
 
</source>  
 
</source>  

Revision as of 15:53, 16 December 2012

SELECT .. WHERE

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

games
yrcity
2000Sydney
2004Athens
2008Beijing
2012London
schema:scott
 DROP TABLE games
 CREATE TABLE games(
  yr INTEGER PRIMARY KEY,
  city VARCHAR(20));
INSERT INTO games VALUES (2000,'Sydney');
INSERT INTO games VALUES (2004,'Athens');
INSERT INTO games VALUES (2008,'Beijing');
INSERT INTO games VALUES (2012,'London');

The SELECT statement returns results from a table. With a WHERE clause only some rows are returned. This example shows the year that Athens hosted the Olympic games.

SELECT yr, city 
FROM scott.games
WHERE yr = 2004
SELECT yr, city 
FROM games
WHERE yr = 2004

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