Difference between revisions of "RANK"

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Line 21: Line 21:
 
       RANK() OVER (ORDER BY population DESC)
 
       RANK() OVER (ORDER BY population DESC)
 
       AS r
 
       AS r
FROM bbc WHERE population>180000000
+
FROM world WHERE population>180000000
 
ORDER BY name
 
ORDER BY name
 
</source>  
 
</source>  
Line 28: Line 28:
 
</div>
 
</div>
  
 +
==Using RANK OVER PARTITION==
 +
You can see view the RANK according to continent. This shows the biggest country
 +
<source lang='sql' class='def e-oracle e-mssql'>
 +
SELECT name,population,
 +
      RANK() OVER (ORDER BY population DESC) AS world_rank,
 +
      RANK() OVER (PARTITION BY continent ORDER BY population DESC) continent_rank
 +
      AS r
 +
FROM world WHERE population>100000000
 +
ORDER BY name
 +
</source>
 
<p>See also</p>
 
<p>See also</p>

Revision as of 08:38, 5 July 2017

Compatibility
RANK() OVER (ORDER BY f DESC)
EngineOKAlternative
ingresNo
mysqlNo
oracleYes
postgresNo
sqlserverYes

RANK

RANK() OVER (ORDER BY f DESC) returns the rank position relative to the expression f.

  RANK() OVER (ORDER BY f DESC) 

In this example we show the ranking, by population of those countries with a population of over 180 million.

SELECT name,population,
       RANK() OVER (ORDER BY population DESC)
       AS r
FROM world WHERE population>180000000
ORDER BY name

Using RANK OVER PARTITION

You can see view the RANK according to continent. This shows the biggest country

SELECT name,population,
       RANK() OVER (ORDER BY population DESC) AS world_rank,
       RANK() OVER (PARTITION BY continent ORDER BY population DESC) continent_rank
       AS r
FROM world WHERE population>100000000
ORDER BY name

See also