関連ワード:  is 0 null in sql    is 0 false in sql    is null 0 sql server    is 0 true or false in sql    is 0 true or false in sql server    is null then 0 in sql    is 0 and null the same in sql    is null equal to 0 in sql    set 0 if value is null in sql    select 0 if value is null in sql