Machine-translated by Google. Questions are authored in English.
Top

Discussion

The wildcard asterisk (*) is the SQL-92 standard for indicating "any sequence of characters."

  • A.True
  • B.False

Answer: B

Correct answer: False

The SQL-92 wildcard for "any sequence of characters" is the percent sign %, used with LIKE, and the underscore _ matches exactly one character.

The asterisk does appear in SQL, but in the SELECT list, where SELECT * means all columns - a different construct entirely. It serves as a wildcard character in Microsoft Access, which departs from the standard, and a pattern written for Access silently returns nothing elsewhere because * is then matched literally.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.