从SELECT RETURNING ID插入PostgreSQL [英] PostgreSql INSERT FROM SELECT RETURNING ID

问题描述

在PostgreSql 9.2.4中，我有两个表： user（ID，登录名，密码，名称）和经销商（id，user_id）。

In PostgreSql 9.2.4 I have two tables: user (id, login, password, name) and dealer (id, user_id).

我想插入两个表，返回创建的交易商的ID。

And I want to insert into both tables returning id of created dealer.

目前，我正在通过两个查询来做到这一点：

Currently I'm doing it with two queries:

WITH rows AS (
    INSERT INTO "user"
        (login, password, name)
    VALUES
        ('dealer1', 'jygbjybk', 'Dealer 1')
    RETURNING id
)
INSERT INTO dealer (user_id)
    SELECT id
    FROM rows;
SELECT currval('dealer_id_seq');

但是我可以用一个 INSERT 使用 RETURNING 语句查询？

But can I implement this with a single INSERT query using RETURNING statement?

推荐答案

您只需要添加一个返回ID 到您的 INSERT ... SELECT ：

You just need to add a RETURNING id to your INSERT ... SELECT:

WITH rows AS (...)
INSERT INTO dealer (user_id)
    SELECT id
    FROM rows
    RETURNING id;

演示： http://sqlfiddle.com/#!12/75008/1

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