How to set Oracle table structure to be empty?

In Oracle, you can set the table structure to be empty by using the following method:

1. Create an empty table using the CREATE TABLE statement.

CREATE TABLE table_name (
  column1 datatype,
  column2 datatype,
  ...
);

When creating a table, there is no need to specify any constraints or default values for columns, resulting in an empty table being created.

1. Remove all data using the ALTER TABLE statement.

ALTER TABLE table_name
  ENABLE ROW MOVEMENT;  -- 打开行迁移
ALTER TABLE table_name
  SET UNUSED column_name;  -- 标记需要删除的列为未使用
ALTER TABLE table_name
  DROP UNUSED COLUMNS;  -- 删除所有标记为未使用的列

This method will preserve the structure of the table but will delete all of the data.

1. Truncate the table using the TRUNCATE TABLE statement.

TRUNCATE TABLE table_name;

This command will delete all data in the table and reset the table’s counter, but will retain the table structure.

The above are several methods for setting Oracle table structures to be empty, you can choose the method that best suits your specific requirements.