SQL Server: CASE WHEN OR THEN ELSE END => the OR is not supported

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Question Description

The OR in the WHEN clause of a CASE statement is not supported. How can I do this?

CASE ebv.db_no 
    WHEN 22978 OR 23218 OR 23219 THEN 'WECS 9500' 
    ELSE 'WECS 9520' 
END as wecs_system 

Practice As Follows

That format requires you to use either:

CASE ebv.db_no 
  WHEN 22978 THEN 'WECS 9500' 
  WHEN 23218 THEN 'WECS 9500'  
  WHEN 23219 THEN 'WECS 9500' 
  ELSE 'WECS 9520' 
END as wecs_system 

Otherwise, use:

CASE  
  WHEN ebv.db_no IN (22978, 23218, 23219) THEN 'WECS 9500' 
  ELSE 'WECS 9520' 
END as wecs_system 

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