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    <p>I believe you can just do something like:</p> <pre><code>INSERT INTO dbo.tblCourse(list of columns) SELECT (list of columns) FROM dbo.tblCourse WHERE (your condition here.....) </code></pre> <p>Of course, the list of columns must match, e.g. you have to have the same number of columns, and the same datatypes. Also, you cannot insert values into e.g. <code>IDENTITY</code> or computed columns.</p> <p><strong>Update:</strong> to do this in Linq-to-SQL, you'd have to have an entity that can represent your data in some way. Then:</p> <ul> <li>select the data from your existing database into a <code>List&lt;Entity&gt;</code> (or whatever your entity is really called)</li> <li>create new objects (entities) based on those retrieved - change your properties as needed</li> <li>insert those entities back into the data context</li> <li>save the changes.</li> </ul> <p>Something along the lines of this code snippet (here I have a table <code>countries</code> which has an <code>ISOCode</code> and a <code>CountryName</code> for some countries; I'm selecting a few, and creating new ones based on those retrieved, adding those new ones to the Linq-to-SQL <code>DataContext</code> and saving in the end):</p> <pre><code>// create and use the Linq-to-SQL DataContext using (LinqSampleDataContext ctx = new LinqSampleDataContext()) { // select some data IQueryable&lt;country&gt; existingCountries = ctx.countries.Where(c =&gt; c.CountryID &lt; 100); // loop over selected data - create new entities based on data retrieved foreach (country c in existingCountries) { country newCountry = new country(); newCountry.CountryName = c.CountryName; newCountry.ISOCode = "X" + c.ISOCode.Substring(1); // add new entities to DataContext ctx.countries.InsertOnSubmit(newCountry); } // submit all the changes ctx.SubmitChanges(); } </code></pre>
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    1. COI am using Linq to SQL, Can somebody help me to translate above mentioned query in LINQ to SQL. I am at very beginner level in this case
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    2. CO@Jawad: updated my response with a Linq-to-SQL sample
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    3. COplease check the update code, i am receving error on a last line of the code, the error is "Cannot add an entity with a key that is already in use."
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