SQL server installed. Shall I apply all CUs or latest one?

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Recently I got into one discussion regarding installation of CU / Patching post SQL server installation. The point of debate was do we need to install all CUs or latest one only. I heard statement from one of my team mate that, we need to install all CUs post SQL server installation.

I asked him about his understanding regarding CUs. He replied that he has been following this practice because his senior said. I said fine and later I shared my blog “What’s the difference between a hotfix, cumulative update, Service Pack, and Feature Pack?”

If you go through this blog then you will come to know that, CU (Cumulative Update) contains all previous fixes. Hence, we do not need to install each and every CU post SQL server installation. Only Install latest CU.

Ex:

Latest CU of SQL server 2019 as on date 18th Apr 2022 is CU16. If SQL server is on CU12 then no need to apply all CUs from 12-16. Only installation of CU16 will be fine.

Thank You.

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