ZipCodeCore · LauraB90 · Aug 1, 2021 · Oct 13, 2021
diff --git a/.DS_Store b/.DS_Store
diff --git a/.idea/.gitignore b/.idea/.gitignore
diff --git a/.idea/SQL.LetsGetTogether.iml b/.idea/SQL.LetsGetTogether.iml
diff --git a/.idea/misc.xml b/.idea/misc.xml
diff --git a/.idea/modules.xml b/.idea/modules.xml
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
diff --git a/README.md b/README.md
diff --git a/answers/exercise1.sql b/answers/exercise1.sql
@@ -0,0 +1,3 @@
+SELECT * FROM Enrolments e
+LEFT JOIN Students s
+ON s.Students = e.StudentID;
diff --git a/answers/exercise2.sql b/answers/exercise2.sql
@@ -0,0 +1,4 @@
+SELECT *
+FROM Enrolments e
+INNER JOIN Students s
+ON Enrolments.StudentID=Students.StudentID;
diff --git a/answers/exercise3.sql b/answers/exercise3.sql
@@ -0,0 +1,4 @@
+SELECT *
+FROM Enrolments
+LEFT JOIN Students
+ON Enrolments.StudentID=Students.StudentID;
diff --git a/answers/exercise4.sql b/answers/exercise4.sql
@@ -0,0 +1 @@
+SELECT COUNT(Country) FROM Students GROUP BY Country;
diff --git a/answers/exercise5.sql b/answers/exercise5.sql
@@ -0,0 +1 @@
+SELECT COUNT(Country) FROM Students GROUP BY Country ORDER BY COUNT(Country) DESC;
diff --git a/answers/exercise6.sql b/answers/exercise6.sql
@@ -0,0 +1 @@
+SELECT COUNT(Country) FROM Students GROUP BY Country HAVING COUNT(Country) > 10 ORDER BY COUNT(Country) DESC;
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		SELECT COUNT(Country) FROM Students GROUP BY Country;