Ask the Expert

Selecting fractions of a penny

How do I write a where clause that will return only values that have more than two digits to the right of the decimal point (ie. 27.543)? The data type is decimal, length 9, precision 13, scale 6. This is a typical situation when you want a dollar figure that is exactly two decimal place to the right of the decimal. I hope this is not too easy.

    Requires Free Membership to View

You said you want the amounts with more than two decimal digits, i.e. the ones with fractions of a penny. The tried-and-true technique involves truncating (rounding down), and then comparing to the original number. Most databases have specialized functions that could be used here, like FLOOR() or ROUND(). Here's a solution that uses just the standard SQL CAST function to do the truncation --

select DollarAmt
  from MoneyTable
 where CAST(DollarAmt*100 AS INTEGER) <> DollarAmt*100

If you want the amounts with exact pennies, use an equal condition.

For More Information

  • What do you think about this answer? E-mail the edtiors at with your feedback.
  • The Best SQL Web Links: tips, tutorials, scripts, and more.
  • Have an SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
  • Ask your technical SQL questions -- or help out your peers by answering them -- in our live discussion forums.
  • Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.

This was first published in March 2002

There are Comments. Add yours.

TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: