InterSystems IRIS TSQL Code 145 ORDER BY items must appear in the select

In this post, you’ll learn about the SQL error code 145 in InterSystems IRIS database the reason why you are receiving the TSQL message when using the InterSystems IRIS data platform

Error Code :

145

Reason for the Error code 145 in InterSystems IRIS DBMS

ORDER BY items must appear in the select list if SELECT DISTINCT is specified.