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Home Database Introduction to SQL See What Others Are Saying!
  • Question
  • In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:


  • Options
  • A. all columns of the table are to be returned.
  • B. all records meeting the full criteria are to be returned.
  • C. all records with even partial criteria met are to be returned.
  • D. None of the above is correct.

  • Correct Answer
  • all columns of the table are to be returned. 


  • More questions

    • 1. Which of the following is true concerning open-source DBMS?

    • Options
    • A. Is free or nearly free database software whose source code is publicly available
    • B. Is free or nearly free database software whose source code is not publicly available
    • C. Is not competitive against PC-oriented packages and is fully SQL compliant
    • D. Is competitive against PC-oriented packages and is not fully SQL compliant
    • Discuss
    • 2. Views constructed from SQL SELECT statements that conform to the SQL-92 standard may not contain:

    • Options
    • A. GROUP BY.
    • B. WHERE.
    • C. ORDER BY.
    • D. FROM.
    • Discuss
    • 3. A server cannot serve on which of the following levels?

    • Options
    • A. Client Layer
    • B. Business Layer
    • C. Database Layer
    • D. All of the above.
    • Discuss
    • 4. When an entity instance may be a member of multiple subtypes or it does not have to be a member of a subtype, it is which of the following?

    • Options
    • A. Disjoint with total specialization
    • B. Disjoint with partial specialization
    • C. Overlap with total specialization
    • D. Overlap with partial specialization
    • Discuss
    • 5. Which of the following occurs when one transaction reads a changed record that has not been committed to the database?

    • Options
    • A. Nonrepeatable read
    • B. Phantom read
    • C. Dirty read
    • D. Consistent read
    • Discuss
    • 6. The wildcard in a WHERE clause is useful when?

    • Options
    • A. An exact match is necessary in a SELECT statement.
    • B. An exact match is not possible in a SELECT statement.
    • C. An exact match is necessary in a CREATE statement.
    • D. An exact match is not possible in a CREATE statement.
    • Discuss
    • 7. Each answer below shows example data from a table. Which answer is an example of the general-purpose remarks column problem?

    • Options
    • A. Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
    • B. Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
    • C. Three rows have the values Brown, NULL, and Blue in the same column.
    • D. One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
    • Discuss
    • 8. Entities can be associated with one another in which of the following?

    • Options
    • A. Entities
    • B. Attributes
    • C. Identifiers
    • D. Relationships
    • Discuss
    • 9. The SQL keyword GROUP BY instructs the DBMS to group together those rows that have the same value in a column.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. An action assertion is a statement that expresses some aspect of the static structure of the organization.

    • Options
    • A. True
    • B. False
    • Discuss


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