Merge pull request #323 from francis-n440/main

Scripts for using LEFT OUTER JOIN with a WHERE clause

Author: brownksc

sql-queries-9/using-LEFT-OUTER-JOIN-with-WHERE-clause/using-LEFT-OUTER-JOIN-with-WHERE-clause.sql

@@ -0,0 +1,9 @@
+SELECT Course.id, Course.name, Course.textbook, Department.code AS department_code 
+FROM Course 
+LEFT OUTER JOIN Department ON Course.department_id = Department.id
+WHERE Department.id < 4;
+
+SELECT Course.id, Course.name, Course.textbook, Department.code AS department_code
+FROM Course
+LEFT OUTER JOIN Department ON Course.department_id = Department.id
+WHERE Department.id < 4 OR Course.department_id IS NULL;

sql-queries-9/using-LEFT-OUTER-JOIN-with-WHERE-clause/using-LEFT-OUTER-JOIN.sql

@@ -0,0 +1,4 @@
+SELECT Course.id, Course.name, Course.textbook, Department.code AS department_code
+FROM Course
+LEFT OUTER JOIN Department
+ON Course.department_id = Department.id AND Department.id < 4;