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You have a database that contains tables named Customer_CRMSystem and Customer_HRSystem. Both
tables use the following structure:
The tables include the following records:
Customer_CRMSystem
Customer_HRSystem
Records that contain null values for CustomerCode can be uniquely identified by CustomerName.
You need to display customers who appear in both tables and have a proper CustomerCode.
Which Transact-SQL statement should you run?
A.
B.
C.
D.
E.
Explanation:
When there are null values in the columns of the tables being joined, the null values do not match each other.
The presence of null values in a column from one of the tables being joined can be returned only by using an
outer join (unless the WHERE clause excludes null values).
https://technet.microsoft.com/en-us/library/ms190409(v=sql.105).aspx
A