TOP HACK 🔥🔥🔥 #sql #top #datascience #sorting #dataengineering #dataanalytics #sqlserver #data

Sometimes we want to retrieve a specific number of records from the SQL table rather than retrieving all table records. We can use the WHERE clause in a SELECT statement to limit the number of rows. Suppose you have a customer table and you want to retrieve records for customers belonging to a particular country. There might be many records satisfying the condition. We require top ‘N’ customer records to satisfy the conditions. For this requirement, we can use TOP or ROW_Number() clauses.

TOP (expression) - Limits the rows returned in a query result set to a specified number of rows or percentage of rows in SQL Server. When you use TOP with the ORDER BY clause, the result set is limited to the first N number of ordered rows. Otherwise, TOP returns the first N number of rows in an undefined order. Use this clause to specify the number of rows returned from a SELECT statement. Or, use TOP to specify the rows affected by an INSERT, UPDATE, MERGE, or DELETE statement.

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TOP HACK 🔥🔥🔥 #sql #top #datascience #sorting #dataengineering #dataanalytics #sqlserver #data