'How to use placeholder in sql to another column in select

i want to make a report and i already calculate it in one column then i want to use the result to another column, something like this

select addtime (timediff(a,b), c) as 'total_lead', case when
total_lead <= then 'yes' else 'no' end as 'check data'  from d

so i want to use the result and use it in another column anyone can help?

mysql sql

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