関連ワード:  add column to existing postgres table    add column to existing table postgresql    add identity column to existing table postgres    add serial column to existing table postgres    add id column to existing table postgres    add multiple columns to existing table postgres    add not null column to existing table postgres    add non nullable column to existing table postgres    postgres add column to existing table with default value    add primary key column to existing table postgresql  
結果 : add column to existing postgres table