下面的这个查询是否有效,或者我是否使用了明确的事务存在和结束?
是的,我知道未提交的读取的危险
SET TRANSACTION isolation level READ uncommitted
SELECT TOP 100 tblguilds.guild_id,
tblguilds.guildname,
tblguilds.leaderuserid,
tblusersprofile.username
FROM tblguilds
LEFT JOIN tblusersprofile
ON tblusersprofile.userid = tblguilds.leaderuserid
WHERE tblguilds.guild_id NOT IN (SELECT guildcode
FROM tblguildapplied
WHERE userid = 1)
ORDER BY Newid()