troubleshooting Question

SQL Update Query

Avatar of hdcowboyaz
hdcowboyazFlag for United States of America asked on
SQL
3 Comments1 Solution258 ViewsLast Modified:
This UPDATE query doesn't run.

UPDATE project pj,
      (
      SELECT est.est_id, SUM(est.ES_AMT) AS samount
      FROM est
      GROUP BY est.est_id
      ) z
SET pj.ES_AMT = z.samount
WHERE z.est_id = est.est_id;

I get an error...
Error Code : 1054
Unknown column 'est.est_id' in 'where clause'


When I change the WHERE clause
UPDATE project pj,
      (
      SELECT est.est_id, SUM(est.ES_AMT) AS samount
      FROM est
      GROUP BY est.est_id
      ) z
SET pj.ES_AMT = z.samount
WHERE z.est_id = est.est_id;

I get an error...
Error Code : 1054
Unknown column 'z.project_id' in 'where clause'

The select statement inside the pulls up the correct info but i can't get the UPDATE & SUM to work on the poject table.

SELECT est.est_id, SUM(est.ES_AMT) AS samount
FROM est
GROUP BY est.est_id
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