What is the method to export the structure of a table in PL/SQL?

In PL/SQL, you can export table structure by using data dictionary views. Here are some commonly used methods:

1. The DESCRIBE statement: The DESCRIBE statement can display the structure information of a table, including column names, data types, lengths, etc. For example:
2. Can you provide information about the table called “table_name”?
3. Data dictionary views can be queried using the SELECT statement to retrieve information about the structure of tables. Common data dictionary views include USER_TABLES, USER_TAB_COLUMNS, ALL_TABLES, and ALL_TAB_COLUMNS. For example:
4. Retrieve the names of columns, data types, and data lengths from the table “table_name” in the database.
5. Utilize the DBMS_METADATA package: DBMS_METADATA is a PL/SQL package used to generate DDL statements. You can use the GET_DDL function in this package to export the DDL statement of a table, thereby obtaining the table’s structure information. For example:
6. Declare a CLOB variable named ddl_text, assign the DDL statement of the ‘table_name’ table to ddl_text using the DBMS_METADATA.GET_DDL function, and then output the ddl_text using DBMS_OUTPUT.PUT_LINE.

Regardless of the method used, one can choose the most suitable way to export the table structure information based on specific needs.