diff --git a/sql-queries-11/count-distinct-multiple-columns/count-distinct-national-id.sql b/sql-queries-11/count-distinct-multiple-columns/count-distinct-national-id.sql
new file mode 100644
index 00000000..b7ebe7fe
--- /dev/null
+++ b/sql-queries-11/count-distinct-multiple-columns/count-distinct-national-id.sql
@@ -0,0 +1,2 @@
+SELECT COUNT(DISTINCT national_id)
+FROM Faculty;
diff --git a/sql-queries-11/count-distinct-multiple-columns/count-distinct-position.sql b/sql-queries-11/count-distinct-multiple-columns/count-distinct-position.sql
new file mode 100644
index 00000000..e8a7082d
--- /dev/null
+++ b/sql-queries-11/count-distinct-multiple-columns/count-distinct-position.sql
@@ -0,0 +1,2 @@
+SELECT COUNT(DISTINCT position)
+FROM Faculty;
diff --git a/sql-queries-11/count-distinct-multiple-columns/direct-sub-query.sql b/sql-queries-11/count-distinct-multiple-columns/direct-sub-query.sql
new file mode 100644
index 00000000..300551e4
--- /dev/null
+++ b/sql-queries-11/count-distinct-multiple-columns/direct-sub-query.sql
@@ -0,0 +1,5 @@
+SELECT COUNT(*) 
+FROM (
+  SELECT DISTINCT national_id, position 
+  FROM Faculty 
+) AS subQuery;
diff --git a/sql-queries-11/count-distinct-multiple-columns/using-concat.sql b/sql-queries-11/count-distinct-multiple-columns/using-concat.sql
new file mode 100644
index 00000000..de592880
--- /dev/null
+++ b/sql-queries-11/count-distinct-multiple-columns/using-concat.sql
@@ -0,0 +1,2 @@
+SELECT COUNT(DISTINCT CONCAT(national_id, position))
+FROM Faculty;
diff --git a/sql-queries-11/count-distinct-multiple-columns/using-two-columns-mysql.sql b/sql-queries-11/count-distinct-multiple-columns/using-two-columns-mysql.sql
new file mode 100644
index 00000000..60319059
--- /dev/null
+++ b/sql-queries-11/count-distinct-multiple-columns/using-two-columns-mysql.sql
@@ -0,0 +1,2 @@
+SELECT COUNT(DISTINCT national_id, position)
+FROM Faculty;