How to merge multiple update statements into one

Requirement: how to merge multiple update statements into one update statement:
For example, update Table1 set Col = '000000' where id = '000000'
Update Table1 set Col = '20140901' where id = '20160901'
How to merge into one? After searching for a long time on the Internet, I summarized a relatively simple statement (some statements are function statements and a little dizzy), as shown below: update Table1 set Col = (case ID when '000000' then '000000' when'000000' then'000000' end) where ID in ('000000', '000000 ') this can also be expanded to multiple fields. You can customize the fields by yourself ~  

How to merge multiple update statements into one