How to find duplicated data group in oracle?

@jerad 

To find duplicate data groups in Oracle, you can use a combination of SQL queries and analytical functions. Here's a step-by-step guide on how to do this:

1. Identify the columns that form a unique group of data. For example, if you have a table called "employees" and you want to find duplicate data groups based on the "department_id" and "job_title" columns, you would use these two columns to identify the duplicate data groups.
2. Write a SQL query using the COUNT() function and GROUP BY clause to find the duplicate data groups. Here's an example query for the "employees" table:

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SELECT department_id, job_title, COUNT(*) AS duplicate_count
FROM employees
GROUP BY department_id, job_title
HAVING COUNT(*) > 1;

This query will group the data based on the "department_id" and "job_title" columns and count the number of rows in each group. The HAVING clause filters out the groups that have more than one row, indicating that they are duplicate data groups.

1. Once you run the query, you will get a list of duplicate data groups along with the count of duplicates in each group. This information can help you identify and clean up the duplicate data in your database.

By following these steps, you can easily find duplicated data groups in Oracle using SQL queries.