You use Microsoft SQL Server 2012 to write code for a transaction that contains several statements.
There is high contention between readers and writers on several tables used by your transaction.
You need to minimize the use of the tempdb space. You also need to prevent reading queries from
blocking writing queries. Which isolation level should you use?

You administer a Microsoft SQL Server 2012 database named ContosoDb. Tables are defined as
shown in the exhibit.

You need to display rows from the Orders table for the Customers row having the Customerld value
set to 1 in the following XML format.

Which Transact-SQL query should you use?

You administer a Microsoft SQL Server 2012 database named ContosoDb. Tables are defined as
shown in the exhibit.

You need to display rows from the Orders table for the Customers row having the CustomerId value
set to 1 in the following XML format.

Which Transact-SQL query should you use?

You are developing a database application by using Microsoft SQL Server 2012. An application
that uses a database begins to run slowly. Your investigation shows the root cause is a query
against a read-only table that has a clustered index. The query returns the following six columns:
– One column in its WHERE clause contained in a non-clustered index.

– Four additional columns.
– One COUNT (*) column based on a grouping of the four additional columns.
You need to optimize the statement. What should you do?

Your database contains tables named Products and ProductsPriceLog. The Products table
contains columns named ProductCode and Price. The ProductsPriceLog table contains columns
named ProductCode, OldPrice, and NewPrice. The ProductsPriceLog table stores the previous
price in the OldPrice column and the new price in the NewPrice column. You need to increase the
values in the Price column of all products in the Products table by 5 percent. You also need to log
the changes to the ProductsPriceLog table. Which Transact-SQL query should you use?

You develop a Microsoft SQL Server 2012 database. You create a view from the Orders and
OrderDetails tables by using the following definition. You need to ensure that users are able to
modify data by using the view. What should you do?

You have three tables that contain data for dentists, psychiatrists, and physicians. You create a
view that is used to look up their email addresses and phone numbers. The view has the following
definition. You need to ensure that users can update only the phone numbers and email addresses
by using this view. What should you do?

You are a database developer of a Microsoft SQL Server 2012 database. The database contains
a table named Customers that has the following definition. You need to ensure that the CustomerId
column in the Orders table contains only values that exist in the CustomerId column of the
Customer table. Which Transact-SQL statement should you use?

You develop a Microsoft SQL Server 2012 database. You create a view that performs the following
tasks:
– Joins 8 tables that contain up to 500,000 records each.
– Performs aggregations on 5 fields.
– The view is frequently used in several reports.
You need to improve the performance of the reports. What should you do?

You develop a Microsoft SQL Server 2012 database that has two tables named SavingAccounts
and LoanAccounts. Both tables have a column named AccountNumber of the nvarchar data type.
You use a third table named Transactions that has columns named TransactionId AccountNumber,
Amount, and TransactionDate. You need to ensure that when multiple records are inserted in the
Transactions table, only the records that have a valid AccountNumber in the SavingAccounts or
LoanAccounts are inserted. Which Transact-SQL statement should you use?