From 24e228f2e70e162e69869c4d3eeac0d679db4be7 Mon Sep 17 00:00:00 2001
From: vaidehi4321 <56602405+vaidehi4321@users.noreply.github.com>
Date: Tue, 10 Dec 2019 09:11:53 -0500
Subject: [PATCH 1/2] created two tables

---
 .idea/.gitignore              |  7 +++++++
 .idea/SQL.LetsGetTogether.iml |  9 +++++++++
 .idea/dataSources.xml         | 11 +++++++++++
 .idea/misc.xml                |  6 ++++++
 .idea/modules.xml             |  8 ++++++++
 .idea/vcs.xml                 |  6 ++++++
 answers/exercise1.sql         |  2 ++
 7 files changed, 49 insertions(+)
 create mode 100644 .idea/.gitignore
 create mode 100644 .idea/SQL.LetsGetTogether.iml
 create mode 100644 .idea/dataSources.xml
 create mode 100644 .idea/misc.xml
 create mode 100644 .idea/modules.xml
 create mode 100644 .idea/vcs.xml

diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..d262f13
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,7 @@
+
+# Default ignored files
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources.local.xml
+# Datasource local storage ignored files
+/dataSources/
\ No newline at end of file
diff --git a/.idea/SQL.LetsGetTogether.iml b/.idea/SQL.LetsGetTogether.iml
new file mode 100644
index 0000000..d6ebd48
--- /dev/null
+++ b/.idea/SQL.LetsGetTogether.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/dataSources.xml b/.idea/dataSources.xml
new file mode 100644
index 0000000..10749d0
--- /dev/null
+++ b/.idea/dataSources.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="postgres@localhost" uuid="a6727156-984d-4798-bb0e-fca443107d7d">
+      <driver-ref>postgresql</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.postgresql.Driver</jdbc-driver>
+      <jdbc-url>jdbc:postgresql://localhost:5432/postgres</jdbc-url>
+    </data-source>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..28a804d
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..a731dc1
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/SQL.LetsGetTogether.iml" filepath="$PROJECT_DIR$/.idea/SQL.LetsGetTogether.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/answers/exercise1.sql b/answers/exercise1.sql
index e69de29..0050290 100644
--- a/answers/exercise1.sql
+++ b/answers/exercise1.sql
@@ -0,0 +1,2 @@
+SELECT * FROM students LEFT JOIN Enrolments
+                   ON Students.id = Enrolments.StudentID;
\ No newline at end of file

From 06d4b00d313b03efbc21a2fad039e0240d4d7f7b Mon Sep 17 00:00:00 2001
From: vaidehi4321 <56602405+vaidehi4321@users.noreply.github.com>
Date: Tue, 10 Dec 2019 14:36:42 -0500
Subject: [PATCH 2/2] 6th not done

---
 answers/exercise1.sql | 5 +++--
 answers/exercise2.sql | 3 +++
 answers/exercise3.sql | 1 +
 answers/exercise4.sql | 1 +
 answers/exercise5.sql | 7 +++++++
 answers/exercise6.sql | 5 +++++
 6 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/answers/exercise1.sql b/answers/exercise1.sql
index 0050290..e86ee73 100644
--- a/answers/exercise1.sql
+++ b/answers/exercise1.sql
@@ -1,2 +1,3 @@
-SELECT * FROM students LEFT JOIN Enrolments
-                   ON Students.id = Enrolments.StudentID;
\ No newline at end of file
+
+
+SELECT * FROM Enrolments   LEFT JOIN Students ON Enrolments.StudentID = Students.id;
diff --git a/answers/exercise2.sql b/answers/exercise2.sql
index e69de29..67a565b 100644
--- a/answers/exercise2.sql
+++ b/answers/exercise2.sql
@@ -0,0 +1,3 @@
+
+
+SELECT * FROM Enrolments   INNER JOIN Students ON Enrolments.StudentID = Students.id;
\ No newline at end of file
diff --git a/answers/exercise3.sql b/answers/exercise3.sql
index e69de29..3a1297f 100644
--- a/answers/exercise3.sql
+++ b/answers/exercise3.sql
@@ -0,0 +1 @@
+SELECT * FROM Enrollments LEFT JOIN ON Enrolments.StudentID=Students.StudentID;
diff --git a/answers/exercise4.sql b/answers/exercise4.sql
index e69de29..71b515d 100644
--- a/answers/exercise4.sql
+++ b/answers/exercise4.sql
@@ -0,0 +1 @@
+SELECT country, count(id) as count from students GROUP BY country;
\ No newline at end of file
diff --git a/answers/exercise5.sql b/answers/exercise5.sql
index e69de29..564f8fd 100644
--- a/answers/exercise5.sql
+++ b/answers/exercise5.sql
@@ -0,0 +1,7 @@
+ELECT Country, COUNT(*) AS Num_Students
+FROM Students
+GROUP BY Country
+ORDER BY COUNT(*) DESC;
+
+-- or
+ SELECT country, count(id) as count from students GROUP BY country order by count;
\ No newline at end of file
diff --git a/answers/exercise6.sql b/answers/exercise6.sql
index e69de29..fbb5608 100644
--- a/answers/exercise6.sql
+++ b/answers/exercise6.sql
@@ -0,0 +1,5 @@
+SELECT Country, COUNT(*) AS Num_Students
+FROM Students
+GROUP BY Country
+ORDER BY Count(*) DESC
+WHERE COUNT(*) > 10;
\ No newline at end of file