diff --git a/src/transformers/schema_transformer.py b/src/transformers/schema_transformer.py
index 12c0047..25dc4d4 100644
--- a/src/transformers/schema_transformer.py
+++ b/src/transformers/schema_transformer.py
@@ -12,9 +12,12 @@ def create_rawdatacor_schema() -> str:
         SQL script to create the table with partitions
     """
     sql = """
+-- Create sequence for id auto-increment
+CREATE SEQUENCE IF NOT EXISTS rawdatacor_id_seq;
+
 -- Create RAWDATACOR table with partitioning
 CREATE TABLE IF NOT EXISTS rawdatacor (
-    id BIGINT NOT NULL,
+    id BIGINT NOT NULL DEFAULT nextval('rawdatacor_id_seq'),
     unit_name VARCHAR(32),
     tool_name_id VARCHAR(32) NOT NULL,
     node_num INTEGER NOT NULL,
@@ -30,7 +33,7 @@ CREATE TABLE IF NOT EXISTS rawdatacor (
 ) PARTITION BY RANGE (EXTRACT(YEAR FROM event_date));
 
 -- Note: PostgreSQL doesn't support PRIMARY KEY or UNIQUE constraints
--- with RANGE partitioning on expressions. Constraints are added on partitions.
+-- with RANGE partitioning on expressions. Using sequence for id auto-increment.
 
 -- Create partitions for each year
 """
@@ -69,9 +72,12 @@ def create_elabdatadisp_schema() -> str:
         SQL script to create the table with partitions
     """
     sql = """
+-- Create sequence for id_elab_data auto-increment
+CREATE SEQUENCE IF NOT EXISTS elabdatadisp_id_seq;
+
 -- Create ELABDATADISP table with partitioning
 CREATE TABLE IF NOT EXISTS elabdatadisp (
-    id_elab_data BIGINT NOT NULL,
+    id_elab_data BIGINT NOT NULL DEFAULT nextval('elabdatadisp_id_seq'),
     unit_name VARCHAR(32),
     tool_name_id VARCHAR(32) NOT NULL,
     node_num INTEGER NOT NULL,
@@ -85,7 +91,7 @@ CREATE TABLE IF NOT EXISTS elabdatadisp (
 ) PARTITION BY RANGE (EXTRACT(YEAR FROM event_date));
 
 -- Note: PostgreSQL doesn't support PRIMARY KEY or UNIQUE constraints
--- with RANGE partitioning on expressions. Constraints are added on partitions.
+-- with RANGE partitioning on expressions. Using sequence for id_elab_data auto-increment.
 
 -- Create partitions for each year
 """