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NEW QUESTION 211
You have a Microsoft SQL Server database. The database contains a table that is defined by the following Transact-SQL statement:
Employee names must always start with a capital letter. You need to define a constraint to enforce the employee name requirement. Which Transact-SQL statement should you use?
Answer: B
NEW QUESTION 212
You are a database developer of a Microsoft SQL Server database. The database contains a table named Instructor that has the following definition:
You are designing a new table named Course that has the following definition:
You need to ensure that the InstructorID column in the Course table contains only values that exist in the InstructorID column of the Instructor table. Which Transact-SQL statement should you use?
Answer: C
Explanation:
http://msdn.microsoft.com/en-us/library/ms189049.aspx
NEW QUESTION 213
Hotspot
You are designing an order entry system that uses an SQL Server database. The following tables exist in the Purchasing database:
You create the following trigger: (Line numbers are included for reference only)
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
Answer:
NEW QUESTION 214
Drag and Drop
You need to create a stored procedure to support the following:
– TRY/CATCH error handling
– Transaction management
Which three statements should you include in the stored procedure in sequence? (To answer, move the appropriate statements from the list of statements to the answer area and arrange them in the correct order.)
Answer:
Explanation:
https://docs.microsoft.com/en-us/sql/t-sql/language-elements/try-catch-transact-sql?view=sql-server-2017
NEW QUESTION 215
You create a table that has the StudentCode, SubjectCode, and Marks columns to record mid-year marks for students. The table has marks obtained by 50 students for various subjects. You need to ensure that the following requirements are met:
– Students must be ranked based on their average marks.
– If one or more students have the same average, the same rank must be given to these students.
– Ranks must be sequential without gaps in between.
Which Transact-SQL query should you use?
Answer: B
Explanation:
The DENSE_RANK function returns the rank of each row within a result set partition, with no gaps in the ranking values. The rank of a specific row is one plus the number of distinct rank values that come before that specific row.
https://docs.microsoft.com/en-us/sql/t-sql/functions/dense-rank-transact-sql?view=sql-server-2017
NEW QUESTION 216
Drag and Drop
You want to add a new GUID column named ProductGUID to a table named dbo.Product that already contains data. ProductGUID will have a constraint to ensure that it always has a value when new rows are inserted into dbo.Product. You need to ensure that the new column is assigned a GUID for existing rows. Which four Transact-SQL statements should you use to develop the solution? (To answer, move the appropriate Transact-SQL segments from the list of SQL-segments to the answer area and arrange them in the correct order.)
Answer:
Explanation:
Box 1: Existing BookGuid can be null.
Box 3: newid (). Generate a new global value.
Box 4: Actually, in the real world, you don’t have to use WITH VALUES at the end of the statement and it works just as well. But because the question specifically states which FOUR TSQL statements to use, we have to include it.
http://msdn.microsoft.com/en-us/library/ms190273.aspx
NEW QUESTION 217
You develop a Microsoft SQL Server database. You design a table to store product information. The table is defined as follows:
You need to meet the following requirements:
– If a product has a product category value other than “REGULAR”, the product should have a sub-category with a length of two characters.
– If a product has the product category “REGULAR”, the product may or may not have a sub-category.
Which Transact-SQL statement should you use?
Answer: C
Explanation:
Either the Category column is REGULAR, or it is not REGULAR and the length of the column is exactly 2.
NEW QUESTION 218
You develop a Microsoft SQL Server database that contains a table named Employee, defined as follows:
You need to create a view that contains two computed columns representing the month and the year of the [HireDate] of each Employee. Which function should you use?
A. DATENAME( )
B. CONVERT( )
C. TRYDATEDIFF( )
D. MONTH( ) and YEAR( )
Answer: D
Explanation:
The Month function returns an integer that represents the month of the specified date. The Year function an integer that represents the year of the specified date.
https://docs.microsoft.com/en-us/sql/t-sql/functions/month-transact-sql?view=sql-server-2017
https://docs.microsoft.com/en-us/sql/t-sql/functions/year-transact-sql?view=sql-server-2017
NEW QUESTION 219
Drag and Drop
You develop an application that uses data from a Microsoft SQL Server database. Your application experiences blocking problems. You need to enable row versioning and you want connections to have row versioning enabled by default. How should you complete the Transact-SQL statement? (To answer, drag the appropriate command to the correct positions. Each command may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)
Answer:
Explanation:
You can use a row versioning-based isolation level. Set READ_COMMITTED_SNAPSHOT database option ON to enable read-committed transactions to use row versioning, and use snapshot isolation.
https://docs.microsoft.com/en-us/sql/relational-databases/sql-server-transaction-locking-and-row-versioning-guide?view=sql-server-2017
NEW QUESTION 220
Drag and Drop
You are a developer for a Microsoft SQL Server database. You need to write a stored procedure that performs several operations in the most efficient way possible. Which operator or operators should you use? (To answer, drag the appropriate operators to the correct operations. Each operator may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)
Answer:
Explanation:
Box 1: UNION ALL. UNION combines the results of two or more queries into a single result set that includes all the rows that belong to all queries in the union. UNION ALL Incorporates all rows into the results. This includes duplicates. If ALL is not specified, duplicate rows are removed.
Box 2: INTERSECT. INTERSECT returns distinct rows that are output by both the left and right input queries operator.
Box 3: INNER JOIN. The INNER JOIN keyword selects records that have matching values in both tables.
Box 4: MERGE. Merge performs insert, update, or delete operations on a target table based on the results of a join with a source table. For example, you can synchronize two tables by inserting, updating, or deleting rows in one table based on differences found in the other table.
Box 5: FULL OUTER JOIN. The FULL OUTER JOIN keyword return all records when there is a match in either left (table1) or right (table2) table records.
Note: FULL OUTER JOIN can potentially return very large result-sets!
Incorrect:
EXCEPT returns distinct rows from the left input query that aren’t output by the right input query.
https://docs.microsoft.com/en-us/sql/t-sql/statements/merge-transact-sql?view=sql-server-2017
https://docs.microsoft.com/en-us/sql/t-sql/language-elements/set-operators-union-transact-sql?view=sql-server-2017
NEW QUESTION 221
SIMULATION
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