因为听起来你只想在应用程序中显示差异,所以只需编写自己的查询,这并不难,下面是一个示例:
DECLARE @TableA table (RowID int, Col1 int, Col2 varchar(5), Col3 datetime)
DECLARE @TableB table (RowID int, Col1 int, Col2 varchar(5), Col3 datetime)
set nocount on
INSERT @TableA VALUES( 1,111,'AAA','1/1/2010')
INSERT @TableA VALUES( 2,222,'BBB','1/1/2010')
INSERT @TableA VALUES( 3,333,'CCC','1/1/2010')
INSERT @TableA VALUES( 4,444,'DDD','1/1/2010')
INSERT @TableA VALUES( 5,555,'EEE','1/1/2010')
INSERT @TableA VALUES( 6,666,'FFF','1/1/2010')
INSERT @TableA VALUES( 7,777,'GGG','1/1/2010')
INSERT @TableA VALUES( 9,888,'HHH','1/1/2010')
INSERT @TableA VALUES(10,111,'III','1/1/2010')
INSERT @TableB VALUES( 1,111,'AAA','1/1/2010')
INSERT @TableB VALUES( 3,333,'CCC','1/1/2010')
INSERT @TableB VALUES( 4,444,'DD' ,'1/1/2010')
INSERT @TableB VALUES( 5,555,'EEE','2/2/2010')
INSERT @TableB VALUES( 6,666,'FFF','1/1/2010')
INSERT @TableB VALUES( 7,777,'GGG','1/1/2010')
INSERT @TableB VALUES( 8,888,'ZZZ','1/1/2010')
INSERT @TableB VALUES( 9,888,'HHH','1/1/2010')
INSERT @TableB VALUES(10,111,'III','1/1/2010')
set nocount off
SELECT
a.RowID, CASE WHEN b.RowID IS NULL THEN 'A' ELSE '' END AS RowsOnlyExistsIn
,a.Col1,b.Col1, CASE WHEN a.Col1=b.Col1 OR (COALESCE(a.Col1,b.Col1) IS NULL) THEN 'N' ELSE 'Y' END AS Col1Diff
,a.Col2,b.Col2, CASE WHEN a.Col2=b.Col2 OR (COALESCE(a.Col2,b.Col2) IS NULL) THEN 'N' ELSE 'Y' END AS Col2Diff
,a.Col3,b.Col3, CASE WHEN a.Col3=b.Col3 OR (COALESCE(a.Col3,b.Col3) IS NULL) THEN 'N' ELSE 'Y' END AS Col3Diff
FROM @TableA a
LEFT OUTER JOIN @TableB b On a.RowID=b.RowID
UNION ALL
SELECT
b.RowID, 'B' AS RowsOnlyExistsIn
,null,b.Col1, 'Y' AS Col1Diff
,null,b.Col2, 'Y' AS Col2Diff
,null,b.Col3, 'Y' AS Col3Diff
FROM @TableB b
WHERE b.RowID NOT IN (SELECT RowID FROM @TableA)
ORDER BY 1
RowID RowsOnlyExistsIn Col1 Col1 Col1Diff Col2 Col2 Col2Diff Col3 Col3 Col3Diff
----------- ---------------- ----------- ----------- -------- ----- ----- -------- ----------------------- ----------------------- --------
1 111 111 N AAA AAA N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
2 A 222 NULL Y BBB NULL Y 2010-01-01 00:00:00.000 NULL Y
3 333 333 N CCC CCC N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
4 444 444 N DDD DD Y 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
5 555 555 N EEE EEE N 2010-01-01 00:00:00.000 2010-02-02 00:00:00.000 Y
6 666 666 N FFF FFF N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
7 777 777 N GGG GGG N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
8 B NULL 888 Y NULL ZZZ Y NULL 2010-01-01 00:00:00.000 Y
9 888 888 N HHH HHH N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
10 111 111 N III III N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
(10 row(s) affected)
当然,您需要动态地生成它,以便可以比较任意两个表。此查询将获取任何表的列:
SELECT
*
FROM INFORMATION_SCHEMA.COLUMNS
WHERE
TABLE_CATALOG ='database'
AND TABLE_SCHEMA='dbo'
AND TABLE_NAME ='yourtable'
ORDER BY ORDINAL_POSITION
下面是一个快速的动态sql版本(我试图拉入所有的PK列并使用它们来动态连接表,但我只在具有1pk列的表上进行了测试):
CREATE TABLE TableA (RowID int primary key, Col1 int, Col2 varchar(5), Col3 datetime)
CREATE TABLE TableB (RowID int primary key, Col1 int, Col2 varchar(5), Col3 datetime)
set nocount on
INSERT TableA VALUES( 1,111,'AAA','1/1/2010')
INSERT TableA VALUES( 2,222,'BBB','1/1/2010')
INSERT TableA VALUES( 3,333,'CCC','1/1/2010')
INSERT TableA VALUES( 4,444,'DDD','1/1/2010')
INSERT TableA VALUES( 5,555,'EEE','1/1/2010')
INSERT TableA VALUES( 6,666,'FFF','1/1/2010')
INSERT TableA VALUES( 7,777,'GGG','1/1/2010')
INSERT TableA VALUES( 9,888,'HHH','1/1/2010')
INSERT TableA VALUES(10,111,'III','1/1/2010')
INSERT TableB VALUES( 1,111,'AAA','1/1/2010')
INSERT TableB VALUES( 3,333,'CCC','1/1/2010')
INSERT TableB VALUES( 4,444,'DD' ,'1/1/2010')
INSERT TableB VALUES( 5,555,'EEE','2/2/2010')
INSERT TableB VALUES( 6,666,'FFF','1/1/2010')
INSERT TableB VALUES( 7,777,'GGG','1/1/2010')
INSERT TableB VALUES( 8,888,'ZZZ','1/1/2010')
INSERT TableB VALUES( 9,888,'HHH','1/1/2010')
INSERT TableB VALUES(10,111,'III','1/1/2010')
set nocount off
动态SQL语句
DECLARE @TableA sysname
,@TableB sysname
,@SQLa varchar(max)
,@SQLb varchar(max)
,@SQL varchar(max)
SELECT @TableA='TableA'
,@TableB='TableB'
,@SQLa=NULL
,@SQLb=NULL
DECLARE @PKs table (RowID int identity(1,1) primary key, PkColumn sysname)
DECLARE @index_id int
,@PK sysname
,@i int
SELECT @index_id=index_id from sys.indexes where object_id=OBJECT_ID(@TableA) AND is_primary_key=1
SELECT @PK=''
,@i=0
while (@PK is not null)
BEGIN
SET @i=@i+1
SELECT @PK = index_col(@TableA, @index_id, @i)
IF @PK IS NULL BREAK
INSERT INTO @PKs (PkColumn) VALUES (@PK)
END
SELECT @SQLa=''
,@SQLb=''''+@TableB+''' '
SELECT
@SQLa=@SQLa+' ,a.'+COLUMN_NAME+',b.'+COLUMN_NAME+', CASE WHEN a.'+COLUMN_NAME+'=b.'+COLUMN_NAME+' OR (COALESCE(a.'+COLUMN_NAME+',b.'+COLUMN_NAME+') IS NULL) THEN ''N'' ELSE ''Y'' END AS '+COLUMN_NAME+'Diff '
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME =@TableA
ORDER BY ORDINAL_POSITION
SELECT
@SQLb=@SQLb+' ,null,b.'+COLUMN_NAME+', ''Y'' AS '+COLUMN_NAME+'Diff'
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME =@TableA
ORDER BY ORDINAL_POSITION
SET @SQL='SELECT CASE WHEN b.'+(SELECT PkColumn FROM @PKs WHERE RowID=1)+' IS NULL THEN '''+@TableA+''' ELSE '''' END AS RowsOnlyExistsIn '
+@SQLa
+'FROM '+@TableA+' a LEFT OUTER JOIN '+@TableB+' b ON '
SELECT
@SQL=@SQL+ CASE WHEN RowID!=1 THEN 'AND ' ELSE '' END +'a.'+PkColumn+'=b.'+PkColumn+' '
FROM @PKs
SET @SQL=@SQL+' UNION ALL SELECT '
+@SQLb
+' FROM '+@TableB+' b LEFT OUTER JOIN '+@TableA+' A ON '
SELECT
@SQL=@SQL+ CASE WHEN RowID!=1 THEN 'AND ' ELSE '' END +'b.'+PkColumn+'=a.'+PkColumn+' '
FROM @PKs
SET @SQL=@SQL+'WHERE a.'+(SELECT PkColumn FROM @PKs WHERE RowID=1)+' IS NULL ORDER BY 2,3'
EXEC(@SQL)
RowsOnlyExistsIn RowID RowID RowIDDiff Col1 Col1 Col1Diff Col2 Col2 Col2Diff Col3 Col3 Col3Diff
---------------- ----------- ----------- --------- ----------- ----------- -------- ----- ----- -------- ----------------------- ----------------------- --------
TableB NULL 8 Y NULL 888 Y NULL ZZZ Y NULL 2010-01-01 00:00:00.000 Y
1 1 N 111 111 N AAA AAA N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
TableA 2 NULL Y 222 NULL Y BBB NULL Y 2010-01-01 00:00:00.000 NULL Y
3 3 N 333 333 N CCC CCC N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
4 4 N 444 444 N DDD DD Y 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
5 5 N 555 555 N EEE EEE N 2010-01-01 00:00:00.000 2010-02-02 00:00:00.000 Y
6 6 N 666 666 N FFF FFF N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
7 7 N 777 777 N GGG GGG N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
9 9 N 888 888 N HHH HHH N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
10 10 N 111 111 N III III N 2010-01-01 00:00:00.000 2010-01-01 00:00:00.000 N
(10 row(s) affected)