For some data record error reason, for example, as the account number = 1, when month =0, the payment method should be PI instead of missing. but the account number 2 is fine. Since all of its months should be missing. So the correct database would be :all of the months should be PI or all of the months should be missing for the same account.
So my question is: for the account like 1, is that possible to let payment method = PI when month = 0? The problem only occur when month = 0 in the problem account.
I try CASE WHEN MONTH = 1 AND Payment_method= 'PI' THEN (CASE WHEN MONTH =0 THEN PAYMENT_METHOD = 'P' END) end
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