How to delete data from one table using joins in oracle?

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by lizzie , in category: MySQL , 3 months ago

How to delete data from one table using joins in oracle?

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1 answer

Member

by lew , 3 months ago

@lizzie 

To delete data from one table using joins in Oracle, you can use the following steps:

  1. Write a DELETE statement with an inner join to specify which rows to delete from the target table.
  2. Use the USING clause in the DELETE statement to specify the join condition between the target table and the table you want to join.
  3. Use the WHERE clause to further filter the rows to be deleted, if necessary.


Here is an example of how you can delete data from one table using joins in Oracle:

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DELETE FROM target_table
USING target_table
INNER JOIN source_table
ON target_table.column_name = source_table.column_name
WHERE source_table.some_condition = 'some_value';


In this example, replace target_table and source_table with the actual names of the tables you are working with. Replace column_name with the actual column name you are using to join the tables. Replace some_condition with the actual condition you want to apply to delete the rows.


Make sure to backup your data before performing any deletion operations to avoid accidental data loss.