<t>That format requires you to use either:<br/>
<br/>
CASE ebv.db_no <br/>
WHEN 22978 THEN 'WECS 9500' <br/>
WHEN 23218 THEN 'WECS 9500' <br/>
WHEN 23219 THEN 'WECS 9500' <br/>
ELSE 'WECS 9520' <br/>
END as wecs_system <br/>
<br/>
```<br/>
<br/>
Otherwise, use:<br/>
<br/>
```<br/>
CASE <br/>
WHEN ebv.db_no IN (22978, 23218, 23219) THEN 'WECS 9500' <br/>
ELSE 'WECS 9520' <br/>
END as wecs_system <br/>
<br/>
```</t>
