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How to do it...

Identify the target table that needs to be updated.
Identify the source table from which the update is to be done:

update test01.web_clicks a -- Target update tablefrom test02.wed_address b -- Source update tableset acc_last_date= date -- Target column that's need to updatedwhere a.Rego_Start_Dt between '2016-12-25' and '2017-01-28' -- Partition column

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