mysql - MySql - 同じテーブルから select ステートメントを使用してテーブルを更新する

Question

同じテーブル内の別の行 (および別の列) の値を使用して、テーブル内の行を更新しようとしています。私の構文は結果を生成しませんが、これに沿った何か: コードは次のとおりです (更新):

UPDATE table1 AS t1 INNER JOIN
(SELECT field_id_46,field_id_47 FROM table1 WHERE entry_id = 36) AS t2
SET t1.field_id_60 = t2.field_id_46, t1.field_id_61 = t2.field_id_47
WHERE t1.entry_id = 45;

Answer 1

update table as t1
inner join (
select field_id_46,field_id_47 from table where entry_id = 36) as t2
set t1.field_id_60 = t2.field_id_46,
    t1.field_id_61 = t2.field_id_47
where t1.entry_id = 45

または、単に

update table as t1,
(
select field_id_46,field_id_47 from table where entry_id = 36) as t2
set t1.field_id_60 = t2.field_id_46,
    t1.field_id_61 = t2.field_id_47
where t1.entry_id = 45

Answer 2

次のように内部結合を使用して更新できます。

UPDATE table1 AS t1 
    INNER JOIN table1 AS t2 
    SET t1.field_id_60 = t2.field_id_46, 
        t1.field_id_61 = t2.field_id_47 
WHERE t1.entry_id = 54;

Answer 3

You are not need to this query

SELECT field_id_46,field_id_47 FROM table WHERE entry_id = '36'

You should just do this:

UPDATE table SET (field_id_60,field_id_61) ('coming_value','other_value') WHERE entry_id = '45';

Also you can do this with 2 different coloumns.I think you can do like this.But It might i havent got any idea.You should split this query in which language do you use.In first method you should use this query.

SELECT field_id_46,field_id_47 FROM table WHERE entry_id = '36'

And You can also return String that is coming from this data.Then you can use this returned value in update function.