diff --git a/database_and_schema_manipulation_script/create_final_tables_with_schema.py b/database_and_schema_manipulation_script/create_final_tables_with_schema.py
index ac99658..e9142df 100644
--- a/database_and_schema_manipulation_script/create_final_tables_with_schema.py
+++ b/database_and_schema_manipulation_script/create_final_tables_with_schema.py
@@ -12,10 +12,7 @@
 DB_PORT = os.getenv("DB_PORT", "5432")
 DB_NAME = os.getenv("DB_NAME")
 
-if not all([DB_USER, DB_PASS, DB_HOST, DB_NAME]):
-    raise SystemExit("Missing DB credentials in config.env. Please set DB_USER, DB_PASSWORD, DB_HOST, DB_NAME.")
-
-#Shema
+#Schema
 TARGET_SCHEMA = "final"
 
 
@@ -27,7 +24,7 @@
     pool_pre_ping=True,
 )
 
-# Helper to prefix CREATE TABLE with schema and table name
+# Function to CREATE TABLE with schema and table name
 def wrap_create(schema: str, table: str, body_sql: str) -> str:
     # Ensure the body_sql does NOT already contain a CREATE TABLE line.
     header = f"CREATE TABLE IF NOT EXISTS {schema}.{table} AS\n"
@@ -64,15 +61,15 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
         sm.subject_area,
         sm.sub_field
     FROM intermediate.student_education se
-    JOIN LATERAL unnest(se.subject_id) AS unnested_subject(subject_id) ON TRUE
+    JOIN LATERAL unnest(se.subject_id) AS unnested_subject(subject_id) ON TRUE     --unnest() function will create one row for each element in the array subject_id
     JOIN intermediate.subject_mapping sm
         ON unnested_subject.subject_id = sm.id
     JOIN intermediate.course_mapping cm
         ON se.education_course_id = cm.course_id
-    LEFT JOIN intermediate.college_mapping colm
+    LEFT JOIN intermediate.college_mapping colm           -- Left join as we don't have all the colleges listed in our standardized table i.e college_mapping table
         ON se.college_id = colm.college_id
     LEFT JOIN intermediate.university_mapping um
-        ON se.university_id = um.university_id
+        ON se.university_id = um.university_id            -- Left join as we don't have all the universities listed in our standardized table i.e university_mapping table
 ),
 aggregated_subjects AS (
     SELECT
@@ -111,9 +108,9 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
     na.college_name,
     na.university_name
 FROM student_details sd
-LEFT JOIN intermediate.location_mapping lm
+LEFT JOIN intermediate.location_mapping lm          --INNER JOIN would have exclude INC 1,2,3 records because no match would be found in the standardized file.
     ON sd.location_id = lm.location_id
-LEFT JOIN student_registration sr
+LEFT JOIN student_registration sr                   --Ensures no data from the student details table is lost, even if there is no corresponding entry in the student_registration table.
     ON sd.id = sr.student_id
 LEFT JOIN aggregated_subjects asub
     ON sd.id = asub.student_id
@@ -126,7 +123,6 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
 WITH cohort_range AS (
     SELECT start_date, end_date
     FROM intermediate.cohort
-	--WHERE cohort_code = 'INC007'
 ),
 
 live_sessions AS (
@@ -179,15 +175,15 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
         sm.subject_area,
         sm.sub_field
     FROM intermediate.student_education se
-    JOIN LATERAL unnest(se.subject_id) AS unnested_subject(subject_id) ON TRUE
+    JOIN LATERAL unnest(se.subject_id) AS unnested_subject(subject_id) ON TRUE      --unnest() function will create one row for each element in the array subject_id
     JOIN intermediate.subject_mapping sm
         ON unnested_subject.subject_id = sm.id
     JOIN intermediate.course_mapping cm
         ON se.education_course_id = cm.course_id
-    LEFT JOIN intermediate.college_mapping colm
+    LEFT JOIN intermediate.college_mapping colm                              -- Left join as we don't have all the colleges listed in our standardized table i.e college_mapping table
         ON se.college_id = colm.college_id
-    LEFT JOIN intermediate.university_mapping um
-        ON se.university_id = um.university_id
+    LEFT JOIN intermediate.university_mapping um                             -- Left join as we don't have all the universities listed in our standardized table i.e university_mapping table                
+        ON se.university_id = um.university_id                               
 ),
 
 aggregated_subjects AS (
@@ -233,9 +229,9 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
     na.college_name,
     na.university_name
 FROM student_attendance sa
-LEFT JOIN intermediate.location_mapping lm
+LEFT JOIN intermediate.location_mapping lm                      --INNER JOIN would have exclude INC 1,2,3 records because no match would be found in the standardized file.
     ON sa.location_id = lm.location_id
-LEFT JOIN student_registration sr
+LEFT JOIN student_registration sr                               --Ensures no data from the student details table is lost, even if there is no corresponding entry in the student_registration table.
     ON sa.student_id = sr.student_id
 LEFT JOIN aggregated_subjects asub
     ON sa.student_id = asub.student_id
@@ -294,9 +290,9 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
         ON unnested_subject.subject_id = sm.id
     JOIN intermediate.course_mapping cm
         ON se.education_course_id = cm.course_id
-    LEFT JOIN intermediate.college_mapping colm
+    LEFT JOIN intermediate.college_mapping colm                 -- Left join as we don't have all the colleges listed in our standardized table i.e college_mapping table
         ON se.college_id = colm.college_id
-    LEFT JOIN intermediate.university_mapping um
+    LEFT JOIN intermediate.university_mapping um                -- Left join as we don't have all the universities listed in our standardized table i.e university_mapping table
         ON se.university_id = um.university_id
 ),
 
@@ -345,9 +341,9 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
     na.college_name,
     na.university_name
 FROM student_assignment ss
-LEFT JOIN intermediate.location_mapping lm
+LEFT JOIN intermediate.location_mapping lm                      --INNER JOIN would have exclude INC 1,2,3 records because no match would be found in the standardized file.
     ON ss.location_id = lm.location_id
-LEFT JOIN student_registration sr
+LEFT JOIN student_registration sr                               --Ensures no data from the student details table is lost, even if there is no corresponding entry in the student_registration table.
     ON ss.student_id = sr.student_id
 LEFT JOIN aggregated_subjects asub
     ON ss.student_id = asub.student_id
@@ -403,9 +399,9 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
         ON unnested_subject.subject_id = sm.id
     JOIN intermediate.course_mapping cm
         ON se.education_course_id = cm.course_id
-    LEFT JOIN intermediate.college_mapping colm
+    LEFT JOIN intermediate.college_mapping colm                     -- Left join as we don't have all the colleges listed in our standardized table i.e college_mapping table
         ON se.college_id = colm.college_id
-    LEFT JOIN intermediate.university_mapping um
+    LEFT JOIN intermediate.university_mapping um                    -- Left join as we don't have all the universities listed in our standardized table i.e university_mapping table
         ON se.university_id = um.university_id
 ),
 
@@ -455,9 +451,9 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
     na.college_name,
     na.university_name
 FROM student_quiz ss
-LEFT JOIN intermediate.location_mapping lm
+LEFT JOIN intermediate.location_mapping lm                      --INNER JOIN would have exclude INC 1,2,3 records because no match would be found in the standardized file.
     ON ss.location_id = lm.location_id
-LEFT JOIN student_registration sr
+LEFT JOIN student_registration sr                               --Ensures no data from the student details table is lost, even if there is no corresponding entry in the student_registration table.
     ON ss.student_id = sr.student_id
 LEFT JOIN aggregated_subjects asub
     ON ss.student_id = asub.student_id
@@ -466,7 +462,7 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
     AND asub.education_course_id = na.education_course_id;
 """)
 
-# Map desired final table names
+# Map final table names
 table_map = [
     ("student_demography", student_demography_body),
     ("daily_weekly_attendance", student_attendance_body),
@@ -474,12 +470,6 @@ def wrap_create(schema: str, table: str, body_sql: str) -> str:
     ("final_quiz", student_quiz_body),
 ]
 
-def save_sql_file(schema: str, table: str, sql_text: str):
-    base = f"{schema}_{table}"
-    fname = f"./{base}.sql"
-    with open(fname, "w", encoding="utf-8") as f:
-        f.write(sql_text)
-    print(f"Saved SQL to {fname}")
 
 def drop_table_if_exists(conn, schema: str, table: str):
     q = text(f"DROP TABLE IF EXISTS {schema}.{table} CASCADE;")
@@ -488,7 +478,7 @@ def drop_table_if_exists(conn, schema: str, table: str):
 
 def run():
     with engine.begin() as conn:
-        # ensure target schema exists (create if missing)
+        # ensure target schema exists
         try:
             conn.execute(text(f"CREATE SCHEMA IF NOT EXISTS {TARGET_SCHEMA};"))
             print(f"Schema ensured: {TARGET_SCHEMA}")
@@ -498,7 +488,7 @@ def run():
         for table_name, body in table_map:
             full_sql = wrap_create(TARGET_SCHEMA, table_name, body)
             print(f"\n--- Preparing to create {TARGET_SCHEMA}.{table_name} ---")
-            save_sql_file(TARGET_SCHEMA, table_name, full_sql)
+            
             if DROP_IF_EXISTS:
                 drop_table_if_exists(conn, TARGET_SCHEMA, table_name)
             try: