As [this article](http://msdn.microsoft.com/en-us/magazine/cc135978.aspx)'s figure 4 says, SQL Server 2005 + can return you a list of missing indexes. It stores 2 important info about missing indexes:

[EqualityUsage],[InequalityUsage]

If I have a missing index where:

[EqualityUsage]='col1',[InequalityUsage]='col2'

Should I create an index with Indexed Key Columns:

'col1,col2'

or

'col2,col1'

?