Free Practice Exam -
70-461 - SQL Server 2012
Question 1 of 15
You're designing a new query that will return all of the medical records from the patients table. This could run into millions of rows so you need to find a way to limit the results to include only the top 100 most recent records. What is the best way to achieve this?
Use select TOP and ORDER BY date
Use select TOP and GROUP BY date
Use ROWCOUNT and ORDER BY date
Use ROWCOUNT and GROUP BY date
That was the correct answer, well done!
Sorry, that was the wrong answer
Use TOP (or OFFSET and FETCH) instead of SET ROWCOUNT to limit the number of rows returned. These methods are preferred over using SET ROWCOUNT for the following reasons:
In SQL Server 2012, SET ROWCOUNT does not affect DELETE, INSERT, MERGE, and UPDATE statements.
As a part of a SELECT statement, the query optimizer can consider the value of expression in the TOP or FETCH clauses during query optimization. Because SET ROWCOUNT is used outside a statement that executes a query, its value cannot be considered in a query plan.
Exam Progress
Move on to the next question
Home
Microsoft Exams
Free practice exams are provided free of charge by Accelerated Ideas. Please respect our exams and do not reproduce our material or abuse the testing system. Thank you. Microsoft exams for MCPD, MCTS, MCP, MCSE, MCSA, MCAD, MCSD
Home
Copyright © Accelerated Ideas 2005-2019
All rights reserved