--表结构：CREATE TABLE t1_old (id int NOT NULL,log_time DATETIME DEFAULT ''
) ;CREATE TABLE t1_new (id int NOT NULL,log_time DATETIME DEFAULT ''
) ;--两表的记录数都为100条。
select count(*) from t1_old;select count(*) from t1_new;

SELECT  COUNT(*)
FROM    ( SELECT    *FROM      [t1_old]UNIONSELECT    *FROM      [t1_new]) AS T;INSERT INTO [dbo].[t1_new]( [id],[log_time] )
VALUES(1,''),(3,''),(4,'')INSERT INTO [dbo].[t1_old]( [id],[log_time] )
VALUES(1,''),(2,''),(3,'')SELECT * FROM [dbo].[t1_new]
SELECT * FROM [dbo].[t1_old]SELECT  COUNT(*)
FROM    ( SELECT    *FROM      [t1_new]UNIONSELECT    *FROM      [t1_old]) AS T;

SELECT  COUNT(*)
FROM    ( SELECT    *FROM      [dbo].[t1_new]EXCEPTSELECT    *FROM      [dbo].[t1_old]) AS T;SELECT  COUNT(*)
FROM    ( SELECT    *FROM      [dbo].[t1_old]EXCEPTSELECT    *FROM      [dbo].[t1_new]) AS T;SELECT * FROM [dbo].[t1_new]SELECT * FROM [dbo].[t1_old]

DECLARE @t1_newcount BIGINT
DECLARE @count BIGINTSELECT  @t1_newcount = COUNT(*)
FROM    t1_new;SELECT  @count = COUNT(*)
FROM    [t1_old] AS aINNER JOIN [t1_new] AS b ON [b].[id] = [a].[id]AND [b].[log_time] = [a].[log_time] --如果表中还有其他字段的自行添加
PRINT @count
PRINT @t1_newcount
IF ( @count = @t1_newcount )BEGIN SELECT  'equal'END
ELSEBEGINSELECT  'not equal'END 

SELECT * FROM [dbo].[t1_new]
SELECT * FROM [dbo].[t1_newreplica]SELECT SUM(CHECKSUM(*)) AS checksumvalue FROM [dbo].[t1_old]
SELECT SUM(CHECKSUM(*)) AS checksumvalue FROM [dbo].[t1_new]
SELECT SUM(CHECKSUM(*)) AS checksumvalue FROM [dbo].[t1_newreplica]