diff --git a/sql-queries-7/README b/sql-queries-7/README
new file mode 100644
index 00000000..a96ddcca
--- /dev/null
+++ b/sql-queries-7/README
@@ -0,0 +1,2 @@
+### Relevant Articles:
+
diff --git a/sql-queries-7/insert-or-update-if-exists/merge-sql-server.sql b/sql-queries-7/insert-or-update-if-exists/merge-sql-server.sql
new file mode 100644
index 00000000..a6c91fcb
--- /dev/null
+++ b/sql-queries-7/insert-or-update-if-exists/merge-sql-server.sql
@@ -0,0 +1,11 @@
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
+
+MERGE INTO Department AS target
+USING (SELECT 1 AS id, 'Computer Science' AS name, 'CSE' AS code) AS source
+ON target.id = source.id
+WHEN MATCHED THEN
+    UPDATE SET name = source.name, code = source.code
+WHEN NOT MATCHED THEN
+    INSERT (id, name, code) VALUES (source.id, source.name, source.code);
+
+SELECT * from Department;
\ No newline at end of file
diff --git a/sql-queries-7/insert-or-update-if-exists/on-conflict-postgresql.sql b/sql-queries-7/insert-or-update-if-exists/on-conflict-postgresql.sql
new file mode 100644
index 00000000..71ce4199
--- /dev/null
+++ b/sql-queries-7/insert-or-update-if-exists/on-conflict-postgresql.sql
@@ -0,0 +1,6 @@
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
+
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CSE')
+ON CONFLICT (id) DO UPDATE SET name = 'Computer Science', code = 'CSE';
+
+SELECT * from Department;
\ No newline at end of file
diff --git a/sql-queries-7/insert-or-update-if-exists/on-duplicate-key-mysql.sql b/sql-queries-7/insert-or-update-if-exists/on-duplicate-key-mysql.sql
new file mode 100644
index 00000000..3faed4f2
--- /dev/null
+++ b/sql-queries-7/insert-or-update-if-exists/on-duplicate-key-mysql.sql
@@ -0,0 +1,6 @@
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
+
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CSE')
+ON DUPLICATE KEY UPDATE name = 'Computer Science', code = 'CSE';
+
+SELECT * from Department;
\ No newline at end of file
diff --git a/sql-queries-7/insert-or-update-if-exists/replace-mysql.sql b/sql-queries-7/insert-or-update-if-exists/replace-mysql.sql
new file mode 100644
index 00000000..3f2d8316
--- /dev/null
+++ b/sql-queries-7/insert-or-update-if-exists/replace-mysql.sql
@@ -0,0 +1,5 @@
+INSERT INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CS');
+
+REPLACE INTO Department (id, name, code) VALUES (1, 'Computer Science', 'CSE');
+
+SELECT * from Department;
\ No newline at end of file