以前のリビジョンの文書です
#確認 DBCC USEROPTIONS #Sessionレベルでの変更 SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED SET TRANSACTION ISOLATION LEVEL READ COMMITTED SET TRANSACTION ISOLATION LEVEL REPEATABLE READ SET TRANSACTION ISOLATION LEVEL SNAPSHOT SET TRANSACTION ISOLATION LEVEL SERIALIZABLE #DatabaseレベルのREAD COMMITTED SNAPSHOT 設定の有効化 ALTER DATABASE Database_name SET READ_COMMITTED_SNAPSHOT ON