Exam 70-762 topic 1 question 139 discussion

Actual exam question from Microsoft's 70-762

Question #: 139
Topic #: 1

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You have a Microsoft SQL Server database named DB1 that contains the following tables:

Users frequently run the following query. The users report that the query takes a long time to return results.

You need to minimize the amount of time required for the query to return data.

A. Create clustered indexes on TBL1 and TBL2.
B. Create a clustered index on TBL1.Create a nonclustered index on TBL2 and add the most frequently queried column as included columns.
C. Create a nonclustered index on TBL2 only.
D. Create UNIQUE constraints on both TBL1 and TBL2. Create a partitioned view that combines columns from TBL1 and TBL2.
E. Drop existing indexes on TBL1 and then create a clustered columnstore index. Create a nonclustered columnstore index on TBL1.Create a nonclustered index on TBL2.
F. Drop existing indexes on TBL1 and then create a clustered columnstore index. Create a nonclustered columnstore index on TBL1.Make no changes to TBL2.
G. Create CHECK constraints on both TBL1 and TBL2. Create a partitioned view that combines columns from TBL1 and TBL2.
H. Create an indexed view that combines columns from TBL1 and TBL2.

Show Suggested Answer

Suggested Answer: D 🗳️
A partitioned view is a view defined by a UNION ALL of member tables structured in the same way, but stored separately as multiple tables in either the same instance of SQL Server or in a group of autonomous instances of SQL Server servers, called federated database servers.
References:
https://docs.microsoft.com/en-us/sql/t-sql/statements/create-view-transact-sql?view=sql-server-2017#partitioned-views

by alex_ at Feb. 18, 2020, 7:04 a.m.

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alex_

Highly Voted 5 years, 3 months ago

G. Create CHECK constraints on both TBL1 and TBL2. Create a partitioned view that combines columns from TBL1 and TBL2. that check constraint will give ability SQL to skip table if user selects different year

upvoted 26 times

Hoglet

4 years, 11 months ago

Agree https://docs.microsoft.com/en-us/sql/t-sql/statements/create-view-transact-sql?view=sql-server-2017#conditions-for-creating-partitioned-views

upvoted 1 times

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stm22

Most Recent 4 years, 10 months ago

yes it is G 1) ALTER TABLE TBL1 ADD CONSTRAINT CK_Year_2016 CHECK (YearColumn = 2016) ALTER TABLE TBL2 ADD CONSTRAINT CK_Year_2015 CHECK (YearColumn = 2015) 2) Create a partitioned view that combines columns from TBL1 and TBL2. 3) select col1, col2, etc from [partitionView] where YearColumn = 2016 will only query TBL1, and skip TBL2

upvoted 3 times

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