I do need distinct. What I don't understand is why it works when I don't use the cast function, but doesn't when I do. With or without casting to a string the row size is the same - not nearly 8000 characters.
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Warning: The query processor could not produce a query plan from the optimizer because the total length of all the columns in the GROUP BY or ORDER BY clause exceeds 8000 bytes. Resubmit your query w
SELECT DISTINCT CAST(d.cde_question as varchar(25)), d.txt_question_text, p.cde_question, p.txt_question_text
FROM (SELECT DISTINCT dq.cde_question, dq.txt_question_text FROM WTportalna1.dbo.t_question
ON dq.cde_question = drq.cde_question
WHERE drq.cde_selsys = 1069 and drq.num_raw_score Is Not Null and dq.num_scale Is Not Null and dq.cde_question_type <> 0) d RIGHT OUTER JOIN
(SELECT DISTINCT tpq.cde_question, tpq.txt_question_text FROM ams_master_testportal.dbo.
ON tpq.cde_question = rq.cde_question
WHERE rq.cde_selsys = 1008 and rq.num_raw_score Is Not Null and tpq.num_scale Is Not Null and tpq.cde_question_type <> 0) p ON
d.txt_question_text = p.txt_question_text OPTION (ROBUST PLAN)
The above query fails with or without OPTION (ROBUST PLAN). It only fails when I try to cast a numeric field to a string field. Any ideas?
-David
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Answers
Why don't you load the part your joining into a temp table.
SELECT DISTINCT tpq.cde_question, tpq.txt_question_text
INTO #TMP
FROM ams_master_testportal.dbo.
ON tpq.cde_question = rq.cde_question
WHERE rq.cde_selsys = 1008 and rq.num_raw_score Is Not Null and tpq.num_scale Is Not Null and tpq.cde_question_type <> 0
Then
SELECT DISTINCT CAST(d.cde_question as varchar(25)), d.txt_question_text, p.cde_question, p.txt_question_text
FROM (SELECT DISTINCT dq.cde_question, dq.txt_question_text FROM WTportalna1.dbo.t_question
ON dq.cde_question = drq.cde_question
WHERE drq.cde_selsys = 1069 and drq.num_raw_score Is Not Null and dq.num_scale Is Not Null and dq.cde_question_type <> 0) d RIGHT OUTER JOIN
#TMP p ON
d.txt_question_text = p.txt_question_text OPTION (ROBUST PLAN)
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by: angelIIIPosted on 2007-02-09 at 05:51:57ID: 18501132
do you really need the DISTINCT? that is the one that makes that error message appear, besides the fact that the fields that you put in the select list have that total size....