commiting first excercise

.gitignore

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+projectnotes.md*

non_usa_customers.sql

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+SELECT CustomerId, FirstName, Country FROM CUSTOMER
+WHERE COUNTRY != 'USA';

project_notes.md

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+# Project Notes - SQL Interlude - U
+
+## Questions
+### How to use NOT in queries
+Why does
+
+```
+SELECT * FROM CUSTOMER
+WHERE COUNTRY NOT LIKE 'USA';
+```
+
+work and
+
+```
+SELECT * FROM CUSTOMER
+WHERE COUNTRY NOT 'USA';
+```
+does not work?
+
+### Answer
+To avoid using like
+`WHERE NOT customer.country = "USA";` <br/>
+or <br/>
+`WHERE NOT != "USA";` <br/>
+
+are valid ways of forming the query.