Transact-SQL????????

RAND:?????? 0 ? 1???? 0 ? 1??????? float ??????? seed?? SQL Server ????????????? ???????????? RAND() ???????????????????????????? RAND()?? RAND() ??????????????????? RAND() ???????

NEWID:?? uniqueidentifier ???????NEWID ???????????????

CHECKSUM:??????????????????????????????????CHECKSUM ??????????????????????????????? CHECKSUM ??(???????????????)

??RAND()???????????? RAND() ????????????????????SELECT???????????????????????????????????????

?????CHECKSUM(NEWID())??RAND(CHECKSUM(NEWID()))????

?????????????