The PRODUCTS table has the following structure: Evaluate the following two SQL statements: Which statement is true regarding the outcome?

The correct answer is B. Both the statements execute and give different results. Using the NVL2 Function The NVL2 function examines the first expression. If the first expression is not null, the NVL2 function returns the second expression. If the first expression is null, the third expression is NVL2(expr1, expr2, expr3) Expr1 is the source value or…

Retrieving Data using the SQL SELECT Statement

Question

The PRODUCTS table has the following structure:

Evaluate the following two SQL statements:

Which statement is true regarding the outcome?

Options

ABoth the statements execute and give the same result
BBoth the statements execute and give different results
COnly the second SQL statement executes successfully
DOnly the first SQL statement executes successfully

How the community answered

(28 responses)

A
7% (2)
B
75% (21)
C
14% (4)
D
4% (1)

Explanation

Using the NVL2 Function The NVL2 function examines the first expression. If the first expression is not null, the NVL2 function returns the second expression. If the first expression is null, the third expression is NVL2(expr1, expr2, expr3) Expr1 is the source value or expression that may contain a null Expr2 is the value that is returned if expr1 is not null Expr3 is the value that is returned if expr1 is null

Topics

#SQL comparison#query outcomes#NULL handling#ORDER BY behavior

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