diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c76d08a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+projectnotes.md*
diff --git a/brazil_customers.sql b/brazil_customers.sql
new file mode 100644
index 0000000..2c9a2a2
--- /dev/null
+++ b/brazil_customers.sql
@@ -0,0 +1,2 @@
+SELECT FirstName, LastName, Country FROM CUSTOMER
+WHERE Country = 'Brazil';
\ No newline at end of file
diff --git a/brazil_customers_invoices.sql b/brazil_customers_invoices.sql
new file mode 100644
index 0000000..810a065
--- /dev/null
+++ b/brazil_customers_invoices.sql
@@ -0,0 +1,12 @@
+SELECT  
+     Customer.FirstName, Customer.LastName, Invoice.InvoiceId, Invoice.InvoiceDate, Invoice.BillingCountry
+FROM
+    Invoice
+INNER JOIN
+     Customer
+ON
+     Invoice.CustomerId = Customer.CustomerId
+WHERE
+     Invoice.BillingCountry = 'Brazil'
+ORDER BY
+     LastName ASC;
\ No newline at end of file
diff --git a/non_usa_customers.sql b/non_usa_customers.sql
new file mode 100644
index 0000000..1aaf752
--- /dev/null
+++ b/non_usa_customers.sql
@@ -0,0 +1,2 @@
+SELECT CustomerId, FirstName, Country FROM CUSTOMER
+WHERE COUNTRY != 'USA';
\ No newline at end of file
diff --git a/project_notes.md b/project_notes.md
new file mode 100644
index 0000000..b22b748
--- /dev/null
+++ b/project_notes.md
@@ -0,0 +1,31 @@
+# Project Notes - SQL Interlude - Chinook
+
+## 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` <br/>
+
+`WHERE NOT customer.country = "USA";` <br/>
+or <br/>
+`WHERE NOT != "USA";` <br/>
+
+are valid ways of forming the query.
+
+## Resources
+[How to concatenate columns in SQL - CONCAT_WS()](https://www.w3schools.com/sql/func_mysql_concat_ws.asp)
+
diff --git a/sales_agent_invoices.sql b/sales_agent_invoices.sql
new file mode 100644
index 0000000..7741fff
--- /dev/null
+++ b/sales_agent_invoices.sql
@@ -0,0 +1,14 @@
+SELECT 
+    EMPLOYEE.FirstName, EMPLOYEE.LastName, InvoiceId
+FROM
+    Employee
+INNER JOIN
+    INVOICE
+ON
+    CUSTOMER.CustomerId = INVOICE.CustomerId
+INNER JOIN
+    Customer
+ON
+    Customer.SupportRepId = Employee.EmployeeId
+ORDER BY
+    InvoiceId ASC;
\ No newline at end of file
diff --git a/sales_agents.sql b/sales_agents.sql
new file mode 100644
index 0000000..b6512c4
--- /dev/null
+++ b/sales_agents.sql
@@ -0,0 +1,8 @@
+SELECT DISTINCT
+    EMPLOYEE.FirstName, EMPLOYEE.LastName 
+FROM 
+    EMPLOYEE
+INNER JOIN
+    Customer
+ON
+    EMPLOYEE.EmployeeId = Customer.SupportRepId;
\ No newline at end of file
diff --git a/unique_invoice_countries.sql b/unique_invoice_countries.sql
new file mode 100644
index 0000000..d74a2b4
--- /dev/null
+++ b/unique_invoice_countries.sql
@@ -0,0 +1,5 @@
+SELECT DISTINCT
+    BillingCountry
+FROM 
+    INVOICE;
+