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NEW QUESTION 49
Consider the following dataset which contains information about houses that are for sale:

Which of the following string manipulation commands will combine the address and region name columns to create a full address?
full_address------------------------- 85 Turner St, Northern Metropolitan 25 Bloomburg St, Northern Metropolitan 5 Charles St, Northern Metropolitan 40 Federation La, Northern Metropolitan 55a Park St, Northern Metropolitan

A. SELECT CONCAT(address, ' , ' , regionname) AS full_address FROM melb LIMIT 5;B. SELECT CONCAT(regionname, ' , ' , address) AS full_address FROM melb LIMIT 5C. SELECT CONCAT(regionname, '-' , address) AS full_address FROM melb LIMIT 5;D. SELECT CONCAT(address, '-' , regionname) AS full_address FROM melb LIMIT 5;

Answer: A

Explanation:
The correct answer is A: SELECT CONCAT(address, ' , ' , regionname) AS full_address FROM melb LIMIT 5; String manipulation (or string handling) is the process of changing, parsing, splicing, pasting, or analyzing strings. SQL is used for managing data in a relational database. The CONCAT() function adds two or more strings together. Syntax CONCAT(stringl, string2,... string_n) Parameter Values Parameter Description stringl, string2, string_n Required. The strings to add together.

 

NEW QUESTION 50
George is conducting a survey. He intends to distribute the survey via email and wants to optionally follow up with respondents based on their answers.
What quality dimension is most vital to the success of George's survey?
Choose the best answer.

A. Validity.B. Consistency.C. Completeness.D. Accuracy.

Answer: C

Explanation:
Accuracy is for measuring how well an attribute matches its intended use.
Consistency measures an attribute's value across systems.
Validity ensures an attribute's value falls within an expected range.
While all of these dimensions are important, Completeness is foundational to George's purpose.

 

NEW QUESTION 51
Q3 2020 has just ended, and now a data analyst needs to create an ad-hoc sales report that demonstrates how well the Q3 2020 promotion went versus last year's Q3 promotion.
Which of the following date parameters should the analyst use?

A. 2019 vs. YTD 2020B. Q3 2019 vs. Q3 2020C. YTD 2019 vs. YTD 2020D. Q4 2019 vs. Q3 2020

Answer: B

 

NEW QUESTION 52
You are a database administrator and you create a precompiled query that is stored on the database server.
What have you created?

A. Function as a service.B. Parameterized query.C. Query execution plan.D. Stored procedure.

Answer: D

Explanation:
A stored procedure is a set of Structured Query Language (SQL) statements with an assigned name, which are stored in a relational database management system (RDBMS) as a group, so it can be reused and shared by multiple programs.
SQL Server stored procedure is a batch of statements grouped as a logical unit and stored in the database. The stored procedure accepts the parameters and executes the T-SQL statements in the procedure, returns the result set if any.

 

NEW QUESTION 53
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