Latest revision as of 11:28, 28 October 2012

NULLIF

NULLIF returns NULL if the two arguments are equal; otherwise NULLIF returns the first argument.

   NULLIF(x,y) = NULL if x=y
   NULLIF(x,y) = x if x != y

NULLIF can be used to replace a specific value with NULL. In this example the party Lab is replaced with NULL.

SELECT name, party
      ,NULLIF(party,'Lab') AS aff
  FROM gisq.msp WHERE name LIKE 'C%'

SELECT name, party
      ,NULLIF(party,'Lab') AS aff
  FROM msp WHERE name LIKE 'C%'

@@ Line 9: / Line 9: @@
 <tr><td align='left'>sqlserver</td><td>Yes</td><td></td></tr>
 </table>
 <h1>NULLIF</h1>
 <p>NULLIF returns NULL if the two arguments are equal; otherwise NULLIF returns the first argument. </p>
@@ Line 35: / Line 36: @@
    <li>[[COALESCE |COALESCE function]]</li>
 </ul>
+{{Languages}}