InterSystems IRIS SQL Error Code -9 Incompatible SELECT lists used in UNION

In this post, you’ll learn about the SQL error code -9 in InterSystems IRIS database the reason why you are receiving the SQL error message when using the InterSystems IRIS data platform

Error Code :

-9

Reason for the Error code -9 in InterSystems IRIS DBMS

Incompatible SELECT lists used in UNION

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