?? ??? ???? MySQL ???? ???? \'?? #1064: SQL ??? ??? ????\'? ???? ??? ??????
Oct 26, 2024 pm 12:06 PM
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#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'a where a.CompetitionID = Competition.CompetitionID' at line 8
??:
Update Competition Set Competition.NumberOfTeams = ( SELECT count(*) as NumberOfTeams FROM PicksPoints where UserCompetitionID is not NULL group by CompetitionID ) a where a.CompetitionID = Competition.CompetitionID
??:
?? ??? where ? ??? ??? ?????. ???? ?(??? a.CompetitionID = Competition.CompetitionID)? ?? ?? ??? ??? ? ????. ?? ?? ??? ???? ?? ?????? ???(??)? where ??? ?????.
?? ??:
? ??? ????? ?? ??? ????? ?????. :
Update
Competition as C
inner join (
select CompetitionId, count(*) as NumberOfTeams
from PicksPoints as p
where UserCompetitionID is not NULL
group by CompetitionID
) as A on C.CompetitionID = A.CompetitionID
set C.NumberOfTeams = A.NumberOfTeams
??:
? ??? ?? ???(?? C)? ? ?? ???? ?? ??(?? A)? ?????. ? ??. ?? ??? CompetitionID???. ?? ?? ???? ?? Competition ???? NumberOfTeams ?? ?? ???? ??? ??? ?????.
??:
? ????? ??? SQL Fiddle?? ??? ? ? ????. : http://www.sqlfiddle.com/#!2/a74f3/1
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