How to Restrict Results to Top N Rows per Group in PL/SQL
Imagine you have data sets in which several groups are there, and you have to take out the top N records from each group with the particular conditions. We may offer the sales leaders by region, the top lists in the person employee for the department to any other particular data segment analysis.
- Using Analytic Functions
- Using Subqueries
- Using Common Table Expressions (CTEs)
- Using RANK() Function
We’ll discuss methods to extract top N records per group: Analytic Functions, Subqueries, Common Table Expressions (CTEs), and the RANK() Function, each offering unique solutions for data analysis.
How to Restrict Results to top N Rows per Group in PL/SQL?
In the world of database administration, retrieving top N rows from every grouping is a frequent but complicated one. Whether you are performing cross-tabulations with large datasets or looking for specific insights within the grouping of data, the ability to restrict the output to top N rows per group is precious.
Implementing this job in PL/SQL, which is Oracle’s procedural extension to SQL, may call for a thought-out approach applying approaches customized for the database environment. Now is the time to explore a how-to and a methodology for determining top N results per group in PL/SQL.