ORA-00937

ORA-00937 not a single-group group function

What causes an ORA-00937 error?

A SELECT list cannot include both a group function, such as AVG, COUNT, MAX, MIN, SUM, STDDEV, or VARIANCE, and an individual column expression, unless the individual column expression is included in a GROUP BY clause.

How Xynomix can help

Drop either the group function or the individual column expression from the SELECT list or add a GROUP BY clause that includes all individual column expressions listed.

To learn more about ways we can support your database visit our Oracle database consultancy page.

Contact Us



    On submitting this form, Xynomix will store your details and may contact you in relation to your request. For more information on how we process data, please see our privacy notice.

    “We have utilised Xynomix consultancy for multiple projects. Most recently we have enlisted their consultants help to complete an Oracle database migration to new servers. As part of this Xynomix used their specialist knowledge to set up an appropriate backup and data retention policy in line with industry best practice. The work was, as always, completed in a timely, efficient manner.”
    aston university