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Home Database Introduction to SQL Comments

  • Question
  • The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 


  • Introduction to SQL problems


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    • 1. SUM, AVG, MIN, and MAX can only be used with numeric columns.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. SQL is a data sublanguage.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. Microsoft Access has become ubiquitous, and being able to program in Access is a critical skill.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. The SQL statement: SELECT Number1 + Number 2 AS Total FROM NUMBER_TABLE; adds two numbers from each row together and lists the results in a column named Total.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Most companies keep at least two versions of any database they are using.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. The wildcard asterisk (*) is the SQL-92 standard for indicating "any sequence of characters."

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. Indexes can usually be created for both primary and secondary keys.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. Scalar aggregate are multiple values returned from an SQL query that includes an aggregate function.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. Data manipulation language (DML) commands are used to define a database, including creating, altering, and dropping tables and establishing constraints.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement.

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


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