根据表的主键字段和数据字段从其它数据库同步相同表的数据

USE [CMS2]
GO

DECLARE @sql NVARCHAR(MAX)

SET @sql = N'MERGE [dbo].[RolePermission] target
			USING [CMS].[dbo].[RolePermission] source
			ON target.[' + STUFF((
			SELECT N'] AND target.[' + [COLUMN_NAME] + N']=source.[' + [COLUMN_NAME]
			FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
			WHERE SUBSTRING([CONSTRAINT_NAME], 1, 2) = 'PK'
				AND [TABLE_NAME] = 'RolePermission'
			FOR XML PATH('')
			), 1, 14, N'') + '] 
			WHEN MATCHED
			THEN UPDATE SET target.[' + STUFF((
			SELECT N'],target.[' + [COLUMN_NAME] + N']=source.[' + [COLUMN_NAME]
			FROM INFORMATION_SCHEMA.COLUMNS
			WHERE [TABLE_NAME] = 'RolePermission'
			FOR XML PATH('')
			), 1, 10, N'') + ']
			WHEN NOT MATCHED
			THEN INSERT VALUES([' + STUFF((
			SELECT N'],[' + [COLUMN_NAME]
			FROM INFORMATION_SCHEMA.COLUMNS
			WHERE [TABLE_NAME] = 'RolePermission'
			FOR XML PATH('')
			), 1, 3, N'') + N'])   
			WHEN NOT MATCHED BY SOURCE THEN   
			DELETE;'

EXEC sp_executesql @sql