update with self join postgresql
); In this case, we will use aliases for the table; otherwise, PostgreSQL will not know which column of which table instance we mean. ('Jacob','Oscar',765,3), update test set code = i1.code from test i1 join test i2 on i1.name = i2.master where i2.code = 0; You probably need to be constraining the join between test and (i1 join i2). The most common syntax for performing a join is T1
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