Question

“ returning”语句返回0行，但是我希望由于冲突而无法插入的行。我在那里缺少什么？

详细信息：表users_strategies获得了主键（id_strategy，id_account）

xsignalsbot=# select * from users_strategies;
 id | id_strategy | id_account | risk | active
----+-------------+------------+------+--------
  1 |           1 |         48 | 0.50 | t
  2 |           2 |         48 | 0.25 | f
(2 rows)

xsignalsbot=# insert into users_strategies (id_strategy,id_account) 
                 values (1,48) on conflict (id_strategy,id_account) do nothing
                    returning active,risk;
 active | risk
--------+------
(0 rows)

Answer 1

将“不要做”更改为UPDATE SET语句（不修改最终结果）会提供所需的结果：

xsignalsbot=# insert into users_strategies (id_strategy,id_account) 
                 values (1,48) on conflict (id_strategy,id_account) do update set
                   id_strategy=excluded.id_strategy returning users_strategies.active, users_strategies.risk;

 active | risk
--------+------
 t      | 0.50
(1 row)

Answer 2

<div class="container"> <div class="one"> <img src="https://picsum.photos/id/600/600/300"> </div> <div class="two"> <img src="https://picsum.photos/id/600/601/300"> </div> <div class="three"> This is the description for the first image </div> <div class="four"> This is the description for the second image </div> </div>不适用于DO NOTHING：

可选的RETURNING子句使INSERT根据实际插入的每一行计算和返回值（或更新，如果使用了ON CONFLICT DO UPDATE子句）。

reference

类型为“ INSERT ON CONFLICT DO NOTHING RETURNING”的查询不返回任何内容

2 个答案: