postgresql在单个查询中更新多个表

Question

我有2个表格如下:

1. serial_table

   id CHARACTER VARYING(20),
   serial_key CHARACTER VARYING(20),
   PRIMARY KEY(id, serial_key)
   

2. serial_rate:

   id CHARACTER VARYING(20), 
   serial_key CHARACTER VARYING(20),
   rate NUMERIC,
   PRIMARY KEY(id, serial_key),
   FOREIGN KEY (id, serial_key) REFERENCES serial_table(id, serial_key)
   

现在我想更新serial_rate.rate并serial_table.serial_key从单个SQL查询更新,如:

UPDATE inventory.serial_table AS s 
JOIN inventory.serial_rate AS r 
ON (s.id, s.serial_key) = (r.id, r.serial_key) 
SET s.serial_key = '0002', r.rate = 22.53
WHERE (s.id, s.serial_key) = ('01', '002');

我知道的是不正确的.是否有可能这样做,因为我想使用该语句PreparedStatement在Java中创建？

编辑 这个问题PreparedStatements与Java 无关这是关于我想在创建时作为参数传递的SQL语法PreparedStatement.我不想要任何答案PreparedStatement.

Answer 1

这是一个CTE的东西(但我不知道如何将它包装成一个准备好的Java东西)

WITH src AS (
        UPDATE serial_rate
        SET rate = 22.53, serial_key = '0002'
        WHERE serial_key = '002' AND id = '01'
        RETURNING *
        )
UPDATE serial_table dst
SET serial_key = src.serial_key
FROM src
-- WHERE dst.id = src.id AND dst.serial_key  = '002'
WHERE dst.id = '01' AND dst.serial_key  = '002'
        ;

Answer 2

这是a_horse_with_no_name在 sqlfiddle.com 上发布的内容：

   WITH id_values (new_key, old_key, id) as (
      values ('0002', '002', '01')
    ), src AS (
      UPDATE serial_rate
          SET rate = 22.53, 
              serial_key = (select new_key from id_values)
      WHERE serial_key = (select old_key from id_values)
        AND id = (select id from id_values)
      RETURNING *
    )
    UPDATE serial_table dst
       SET serial_key = src.serial_key
    FROM src
    WHERE dst.id = (select id from id_values)
      AND dst.serial_key = (select old_key from id_values)
    ;

这实际上是wildplasser发布的内容的修改版本，作为对我关于该serial_key字段是否可以使用一次的查询的答复。