|  |  | Archives of the TeradataForumMessage Posted: Wed, 25 Jul 2007 @ 18:19:59 GMT
 
 
  
| Subj: |  | UPDATE, SET, & Subquery Re-visited |  |  |  | From: |  | Anantaraman, Kumaran |  
 A previous post
asked how to code an UPDATE statement if the expression in the SET clause were to use a subquery. And suggested answers were like : 
     UPDATE SUMMARY_TABLE
     FROM
       (
         SELECT COUNT(1) TOTAL_COLUMN
         FROM TABLE_OF_MISMATCHES
       ) b
     SET TOTAL_COLUMN = b.TOTAL_COLUMN
 However, the FROM clause is (from manual) '.. a Teradata extension to the ANSI SQL-2003 standard.'.  So, then, how to code the above
UPDATE functionality without using FROM clause? 
 
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