使用SQL語句逐條更新每條記錄

有些時候，咱們但願同時更新表中的多條記錄，但更新的值不同。

declare @i int

declare @j int

declare @phone varchar(20)

set @j=1 select @i=count(*) from LatestLocation

DECLARE L_cursor CURSOR FOR SELECT Phone FROM LatestLocation

OPEN L_cursor

while @j<=@i

begin

FETCH NEXT FROM L_cursor into @phone update LatestLocation set LocationY = 32.009795 - 0.014887*RAND() * 0.7 where Phone=@phone

set @j=@j+1

end

CLOSE L_cursor

DEALLOCATE L_cursor