Composite Indexes in SQL- keshradamora

sql-queries-index/composite-index-in-sql/analyze-composite-index-performance.sql

@@ -0,0 +1,9 @@
+--analyze query performance after assigning composite index
+EXPLAIN SELECT * 
+FROM Student 
+WHERE enrollment_date = '2020-01-15' AND gpa > 4.0;
+
+--optimized query
+SELECT * 
+FROM Student 
+WHERE enrollment_date = '2020-01-15' AND gpa > 4.0;

sql-queries-index/composite-index-in-sql/analyze-query-with-no-composite-index.sql

@@ -0,0 +1,4 @@
+--analyze query performance on column without composite index assigned, using EXPLAIN
+EXPLAIN SELECT * 
+FROM Student 
+WHERE birth_date = '2002-05-15' AND gpa > 3.5;

sql-queries-index/composite-index-in-sql/create-composite-index.sql

@@ -0,0 +1,6 @@
+--show index in table
+SHOW INDEX FROM Student;
+
+--create index on multiple columns
+CREATE INDEX idx_enrollment_gpa 
+ON Student (enrollment_date, gpa);

sql-queries-index/composite-index-in-sql/drop-composite-index.sql

@@ -0,0 +1,6 @@
+--drop the index created
+DROP INDEX idx_enrollment_gpa 
+ON Student;
+
+--Verify if index is dropped
+SHOW INDEX FROM Student;