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Editorial Team
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Asked: 2026-05-26T09:28:38+00:00

i am having syntax error with the following sql statement the thing is i

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i am having syntax error with the following sql statement
the thing is i wan to count duplicate in 3 differents columns in a table.
i am using visual studio 2010 and .NET Framework Data Provider for OLE DB

this query will return all entry in one recordset 

string testqry = 
SELECT NO_IDENT_1 As NO_IDENT_2 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25}) 
Union All 
SELECT NO_IDENT_2 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25}) 
Union All 
SELECT NO_IDENT_3 As NO_IDENT_2 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25});

but the following will signal syntax error 

    string RqNbIdent10 =
"SELECT COUNT(*) as repeat 
from ( 
    SELECT NO_IDENT_1 As NO_IDENT_2 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25})     
    Union All 
    SELECT NO_IDENT_2 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25}) 
    Union All 
    SELECT NO_IDENT_3 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25}) 
    ) GROUP BY NO_IDENT_2"
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1 Answer

  1. Editorial Team

    You need to identify the sub-select result set, here I have identified as results.

    SELECT results.NO_IDENT_2, COUNT(results.NO_IDENT_2) as repeat 
from ( 
    SELECT NO_IDENT_1 As NO_IDENT_2 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25})     
    Union All 
    SELECT NO_IDENT_2 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25}) 
    Union All 
    SELECT NO_IDENT_3 FROM P240538 WHERE (P240538.DATE_dt > {2011/04/25}) 
    ) results GROUP BY results.NO_IDENT_2
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