ALTER trigger [dbo].[insert_collect]on [dbo].[collect]for insertasbegindeclare @bno charselect @bno from insertedupdate dbo.book set dbo.book.bcollect =dbo.book.bcollect +1 where @bno=dbo.book.bnoend對collect進行insert操作后，book表里的數(shù)據(jù)并沒有發(fā)生改變是什么情況