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with adod_dict do
begin
close;
commandtext:='select bgqxcode,count(*) wjsl from wscl_wsda_file where wjnd=:tnd group by bgqxcode';
parameters[0].DataType:=ftstring;
parameters[0].Value:=trim(cbtjnd.Text);
open;
end;
ÒÔÉÏÊÇdelphiÖеÄÓï¾ä£¬ÔËÐÐʱ£¬ÀÏÊDZ¨ora-00979 ²»ÊÇ group by ±í´ïʽ?
ORA-00979 not a GROUP BY expression
Cause: The GROUP BY clause does not contain all the expressions in the SELECT clause. SELECT expressions that are not included in a group function, such as AVG, COUNT, MAX, MIN, SUM, STDDEV, or VARIANCE, must be listed in the GROUP BY clause.
Action: Include in the GROUP BY clause all SELECT expressions that are not group function arguments.
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"´øÓÐ group by ×Ó¾äµÄ²éѯÖÐµÄ select ×Ö¶ÎÁбíÖУ¬³ýÁ˰üº¬ÔÚ group by ÖеÄ×ֶΣ¬ÆäËû×ֶζ¼ÒªÇó×÷Ϊ group function £¨±ÈÈç AVG, COUNT, MAX, MIN, SUM £©µÄ²ÎÊý³öÏÖ£¬ÄãµÄ×Ó²éѯΥ×÷ΪÖ÷²éѯµÄÒ»¸ö×Ö¶ÎÎ¥·´ÁËÕâ¸ö¹æÔòÁË¡£"
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