docs(notes): update IBM DB2 table SQL guide

Author: lzwjava

Diff for: notes/2025-04-09-ibm-db2-table-sql-en.md

@@ -94,3 +94,82 @@ if __name__ == "__main__":
 
 Would you like further customization or assistance with any part of this script?
 
+---
+
+To integrate the `ibm_db_dbi` package into your script, you can use it to establish a connection and execute queries. The `ibm_db_dbi` package provides a more Pythonic interface for interacting with IBM Db2 databases, similar to other DB-API 2.0 compliant modules like `sqlite3` or `psycopg2`.
+
+Here's how you can modify your script to use `ibm_db_dbi`:
+
+```python
+import ibm_db
+import ibm_db_dbi
+
+def generate_create_table_sql(schema_name, table_name, conn):
+    # Query to get column details
+    query = f"""
+    SELECT COLNAME, TYPENAME, LENGTH, SCALE, NULLS, DEFAULT, IDENTITY
+    FROM SYSCAT.COLUMNS
+    WHERE TABSCHEMA = '{schema_name}' AND TABNAME = '{table_name}'
+    ORDER BY COLNO;
+    """
+
+    # Execute the query using ibm_db_dbi
+    cursor = conn.cursor()
+    cursor.execute(query)
+    result = cursor.fetchone()
+
+    # Start constructing the CREATE TABLE statement
+    create_table_sql = f"CREATE TABLE {schema_name}.{table_name} (\n"
+
+    while result:
+        colname = result[0]
+        typename = result[1]
+        length = result[2]
+        scale = result[3]
+        nulls = 'NOT NULL' if result[4] == 'N' else 'NULL'
+        default = f"DEFAULT {result[5]}" if result[5] else ''
+        identity = 'GENERATED ALWAYS AS IDENTITY' if result[6] == 'Y' else ''
+
+        # Construct the column definition
+        col_def = f"    {colname} {typename}"
+        if length:
+            col_def += f"({length}"
+            if scale:
+                col_def += f", {scale}"
+            col_def += ")"
+        col_def += f" {nulls}"
+        if default:
+            col_def += f" {default}"
+        if identity:
+            col_def += f" {identity}"
+
+        create_table_sql += col_def + ",\n"
+        result = cursor.fetchone()
+
+    # Remove the last comma and add the closing parenthesis
+    create_table_sql = create_table_sql.rstrip(",\n") + "\n);"
+
+    return create_table_sql
+
+# Example usage
+if __name__ == "__main__":
+    # Replace with your actual database connection details
+    dsn = "DATABASE=your_db;HOSTNAME=your_host;PORT=your_port;PROTOCOL=TCPIP;UID=your_uid;PWD=your_pwd;"
+    conn = ibm_db_dbi.connect(dsn, "", "")
+
+    schema_name = 'your_schema'
+    table_name = 'your_table'
+
+    create_table_sql = generate_create_table_sql(schema_name, table_name, conn)
+    print(create_table_sql)
+
+    # Close the connection
+    conn.close()
+```
+
+### Key Changes:
+1. **Connection**: The connection is established using `ibm_db_dbi.connect()` instead of `ibm_db.connect()`.
+2. **Cursor**: A cursor is created using `conn.cursor()`, and queries are executed using this cursor.
+3. **Fetching Results**: Results are fetched using `cursor.fetchone()`, which returns a tuple.
+
+This approach leverages the `ibm_db_dbi` package for a more Pythonic way of interacting with the database, making the code cleaner and easier to manage.