docs(notes): update IBM DB2 table SQL guide

Author: lzwjava

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

@@ -94,81 +94,3 @@ if __name__ == "__main__":
 
 Would you like further customization or assistance with any part of this script?
 
----
-
-If you can use DBeaver to export the table structure to a JSON file, you can then use that JSON file to construct the `CREATE TABLE` SQL statement. Here's how you can achieve this:
-
-### Steps to Export Table Structure to JSON using DBeaver
-
-1. **Open DBeaver**: Connect to your IBM Db2 database.
-2. **Navigate to the Table**: Find the table whose structure you want to export.
-3. **Export as JSON**: Right-click on the table and select the option to export the table structure as JSON. Save the JSON file to your local machine.
-
-### Python Script to Construct `CREATE TABLE` SQL from JSON
-
-Once you have the JSON file, you can use the following Python script to read the JSON file and construct the `CREATE TABLE` SQL statement:
-
-```python
-import json
-
-def generate_create_table_sql_from_json(json_file_path):
-    # Load the JSON file
-    with open(json_file_path, 'r') as file:
-        table_data = json.load(file)
-
-    # Extract table and schema name
-    schema_name = table_data.get('schema')
-    table_name = table_data.get('name')
-
-    # Start constructing the CREATE TABLE statement
-    create_table_sql = f"CREATE TABLE {schema_name}.{table_name} (\n"
-
-    # Iterate over columns to construct the column definitions
-    for column in table_data.get('columns', []):
-        colname = column.get('name')
-        typename = column.get('type')
-        length = column.get('length')
-        scale = column.get('scale')
-        nulls = 'NOT NULL' if column.get('nullable') == False else 'NULL'
-        default = f"DEFAULT {column.get('default')}" if column.get('default') else ''
-        identity = 'GENERATED ALWAYS AS IDENTITY' if column.get('identity') == True 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"
-
-    # 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__":
-    json_file_path = 'path_to_your_json_file.json'
-    create_table_sql = generate_create_table_sql_from_json(json_file_path)
-    print(create_table_sql)
-```
-
-### Instructions
-
-1. **Export JSON**: Use DBeaver to export the table structure to a JSON file.
-2. **Update File Path**: In the script, update the `json_file_path` variable with the path to your exported JSON file.
-3. **Run the Script**: Execute the script to generate the `CREATE TABLE` SQL statement.
-
-### Additional Considerations
-
-- **JSON Structure**: Ensure the JSON file contains the necessary details such as column names, data types, lengths, scales, nullability, defaults, and identity settings.
-- **Constraints and Indexes**: If the JSON file includes information about constraints and indexes, you can extend the script to include them in the `CREATE TABLE` statement.
-
-Would you like further customization or assistance with any part of this process?