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You have a database that tracks orders and deliveries for customers in North America. The database contains
the following tables:
Sales.Customers
Application.Cities
Sales.CustomerCategories
The company’s development team is designing a customer directory application. The application must list
customers by the area code of their phone number. The area code is defined as the first three characters of the
phone number.
The main page of the application will be based on an indexed view that contains the area and phone number
for all customers.
You need to return the area code from the PhoneNumber field.
Solution: You run the following Transact-SQL statement:
Does the solution meet the goal?
A.
Yes
B.
No
Explanation:
We need SELECT TOP 1 @areacode =.. to ensure that only one value is returned.
I approve
https://docs.microsoft.com/en-us/sql/t-sql/functions/string-split-transact-sql?view=sql-server-2017
14
1
No
3
3
the correct answer is NO.
remember,The area code is defined as the first three characters of the
phone number.
como bien dice los 3 primeros caracteres se usa left
CREATE FUNCTION dbo.areaCode(
@phoneNumber NVARCHAR(50)
)
RETURNS NVARCHAR(MAX)
WITH SCHEMABINDING
AS
BEGIN
DECLARE @areaCode NVARCHAR(MAX)
SELECT @areaCode=LEFT(@phoneNumber,3)
RETURN @areaCode
END
6
2
Agree.
The STRING_SPLIT(@phonenumber, ‘-‘) returns a value set for each phonenumber rather than only the area code.
For example,
SELECT value from STRING_SPLIT(‘425-555-0187’, ‘-‘) returns:
425
555
0187
The function then will not get the area code to return.
1
1