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In oracle we are using dual table name for the temporary purpose. which table we are using in SQL server

  
Total Answers and Comments: 1 Last Update: March 23, 2006     Asked by: periyasamy 
  
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March 22, 2006 22:54:55   #1  
gheibia Member Since: November 2005   Contribution: 3    

RE: In oracle we are using dual table name for the tem...
The SELECT command'S syntax in SQL Server is different than Oracle.In SQL Server you don't need (always) to select data from a source (using FROM).you can just select a variable.What SQL Server dose is return that variable's value as the result set.So you can have a quary like this:declare @Myvar varchar(10)set @Myvar 'AMIR'SELECT @Myvarbut in Oracle you have to complete the SELECT command. So you need to have a FROM clause in your SELECT Command. But when you want to return a variable or constant using SELECT you don't have any source table or view. That's why you use the dual table.SELECT 'AMIR' FROM dual;
 
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