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2025 Excellent Trustworthy Data-Management-Foundations Exam Torrent | 100% Free WGU Data Management–Foundations Exam Dumps Questions
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WGU Data Management – Foundations Exam Sample Questions (Q56-Q61):
NEW QUESTION # 56
Which operator defines the field that the index is using in a CREATE TABLE statement?
- A. UNIQUE
- B. CHECK
- C. IN
- D. ON
Answer: D
Explanation:
TheONkeyword specifies the field used by anindexwhen creating it in SQL.
Example Usage:
sql
CREATE INDEX idx_employee_name
ON Employees(Name);
* Here, an indexidx_employee_nameis createdon the Name column.
* Thisimproves query performancewhen filtering by Name.
Why Other Options Are Incorrect:
* Option B (IN) (Incorrect):Used in queries to match values in a set, not for indexing.
* Option C (UNIQUE) (Incorrect):Ensures a column has unique values but doesnot define an index field.
* Option D (CHECK) (Incorrect):Used forvalidating column values, not for indexing.
Thus, the correct answer isON, as it defines thecolumn on which an index is created.
NEW QUESTION # 57
Which clause from a SELECT statement immediately accompanies the SELECT clause in MySQL?
- A. FROM
- B. WHERE
- C. TABLE
- D. VALUE
Answer: A
Explanation:
InSQL syntax, the FROM clause is the first clause that follows SELECT. It specifies the table(s) from which the data will be retrieved.
Example:
sql
SELECT name, salary FROM Employees;
* Option A (Correct):The FROM clauseimmediately followsthe SELECT clause in MySQL.
* Option B (Incorrect):VALUE is not a valid clause in MySQL SELECT statements.
* Option C (Incorrect):WHERE is used to filter recordsafter specifying the table in FROM.
* Option D (Incorrect):TABLE is not a valid clause following SELECT in SQL.
NEW QUESTION # 58
Which action does the % operator accomplish in MySQL?
- A. Compares two numeric values for equality
- B. Divides two numeric values and returns the remainder
- C. Raises a numeric value to the power of another
- D. Subtracts a numeric value from another
Answer: B
Explanation:
The % operator in MySQL is known as themodulus operator. It returns theremainderof a division operation between two numbers.
Example:
sql
SELECT 10 % 3; -- Output: 1 (10 divided by 3 gives remainder 1)
* Option A (Incorrect):Raising a number to a power is done using the POW() function or
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