SQL Server Data cleaning : <p>please I want your help
I will start working on data mining project using sql server for database. 
I have big database and before I start working on my project for sure I need to do data cleaning on my database, so 
please I want your suggestions what I need to do, like removing duplicate, and removing spaces from some columns ? what else and what I need to do to be sure that my data are ready to start working on it with data mining process like clustering and decisions tree ...... </p>

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<li>Also please if you have any useful videos for Data mining in general using SQL Server Management studio - sql server  cleaning data</li>
</ul>

<p>Thanks a lot in Advance...</p>
