Sql-server – the difference between Logical connection and User connections

SQLIO is a generic tool for testing your disk subsystem. It allows you to specify whether to test random/sequential, data block sizes, queue depth, threading, etc.

SQLIOSim is a tool that tries to emulate the patterns that SQL Server would expose to your system.

Usually I'll use SQLIO to test the subsystem when benchmarking for raw specs. Once satisfied with my SQLIO results I'll run SQLIOSim to get a real world run through of the disk subsystem.

You might want to see Brent Ozars tutorial on SQLIO, which also mentions SQLIOSim: http://www.brentozar.com/archive/2008/09/finding-your-san-bottlenecks-with-sqlio/

Other than tablediff and powershell mentioned in the previous answers, you can also use SQL with the UNION ALL statement to find the records that don’t match in 2 identical tables:

SELECT MIN(TableName) AS TableName
   ,ID
   ,NAME
   ,lastname
   ,Address
   ,City
FROM (
SELECT 'Table A' AS TableName
    ,Customers.id
    ,Customers.NAME
    ,Customers.lastname
    ,Customers.Address
    ,Customers.City
FROM Customers

UNION ALL

SELECT 'Table B' AS TableName
    ,CustomersOld.id
    ,CustomersOld.NAME
    ,CustomersOld.lastname
    ,CustomersOld.Address
    ,CustomersOld.City
FROM CustomersOld
) tmp
GROUP BY ID
   ,NAME
   ,lastname
   ,Address
   ,City
HAVING COUNT(*) = 1
ORDER BY id;

Another option you can try is using Data Compare in Visual Studio itself. It compares data in the source database and the target database and creates a synchronization script for the tables you’ve selected for synchronization.

And last, but not least, you can use SQL data comparison tool - ApexSQL Data Diff, to set all synchronization options, map the tables and columns with different names, create your own keys for comparison in the GUI. You can schedule it to run unattended and all you have to do is check SQL Server job history in the morning. If you need more details regarding these options, I recommend reading this article: http://solutioncenter.apexsql.com/automatically-compare-and-synchronize-sql-server-data/