MySQL CONCAT returns NULL if any field contain NULL

Question

I have following data in my table \"devices\"

affiliate_name  affiliate_location  model     ip             os_type    os_version 

cs1             inter             


        

Answer 1

Use CONCAT_WS instead:

CONCAT_WS() does not skip empty strings. However, it does skip any NULL values after the separator argument.

SELECT CONCAT_WS('-',`affiliate_name`,`model`,`ip`,`os_type`,`os_version`) AS device_name FROM devices