sql - Update query in Postgresql -

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i have 2 tables in postgresql. 1 satetable having column statename , statecode , disttable having columns distname, statename , statecode. in disttable columns distname , statename populated. want update 'statecode' column in disttable. kindly help.

create table statetable (statename varchar, statecode varchar);  create table disttable (distname varchar, statename varchar, statecode varchar);   insert statetable  values     ('new york','ny'),     ('nebraska','nb'),     ('alaska','al');   insert disttable values     ('king','new york', null),     ('salt lake','nebraska', null),     ('hanlulu','al', null);

corrcet me if wrong, think model should be: 

create table statetable (statename varchar, statecode varchar);  create table disttable (distname varchar, statecode varchar);   insert statetable  values     ('new york','ny'),     ('nebraska','nb'),     ('alaska','al');   insert disttable values     ('king','ny'),     ('salt lake','nb'),     ('hanlulu','al');

futhermore think wise have identification on disttable later can add other address tables.


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