Defining a Custom Sort Order

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From the Customers table in the Northwind sample database, I want to return the list of customers by country in the custom sort order that Figure 1 shows. How can I define that sort order?

To define the custom sort order, you can use a CASE expression in the ORDER BY clause, as Listing 1 shows. Alternatively, you can create an auxiliary table in which you store your custom sort order, then join the auxiliary table to the Customers table, as Listing 2 shows.

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