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create table tab1 ( id int, name text ); insert into tab1 values (1, 'Name1'), (2, 'Name2'); create table tab2 ( id int, name text ); insert into tab2 values (1, 'Name1'), (2, null); select t.name, k.name from tab1 t left join tab2 k on t.id = k.id where k.name is not null; select t.name, k.name from tab1 t left join tab2 k on t.id = k.id and k.name is not null;

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