Question

我有一张桌子：

CREATE TABLE sale_tender_t0
(
  sten_bill bigint NOT NULL,
  sten_paymentform smallint NOT NULL,
  sten_tenderamount integer,
  sten_changeamount integer,
  sten_isfiscal character(1),
  sten_accid integer,
  sten_id bigserial NOT NULL,
  sten_map_user integer,
  sten_storeid integer NOT NULL

和一些数据，如：

11246276310734;0;5000;2748;"0";;1913;;1
11246277847093;0;25000;2083;"0";;1914;;1
11246280935156;0;2254;0;"0";;1915;;1
11246281048531;0;2240;100;"0";;1916;;1
11246281345250;0;10000;1360;"0";;1917;;1

sten_bill - 应该有唯一的数据，但有时会发生数据sten_bill重复。使用此脚本我可以找到重复的数据：

select sten_bill from sale_tender_t0 GROUP by sten_bill
HAVING count(*)>1;

但我需要修复表格，例如：

11246276310734;0;5000;2748;"0";;1913;;1
11246276310734;1;5000;2748;"0";;1913;;1

应修复如下：

11246276310734;1;10000;5496;"0";;1913;;1

删除第一列，并更改第二列数据column2.sten_tenderamount + column1.sten_tenderamount和column2.sten_changeamount + column2.sten_changeamount

Answer 1

WITH max_id_and_summed_amounts AS (
  SELECT
    sten_bill,
    SUM(sten_tenderamount) AS sten_tenderamount,
    SUM(sten_changeamount) AS sten_changeamount,
    MAX(sten_id) AS sten_id
  FROM
    sale_tender_t0
  GROUP BY
    sten_bill
  HAVING
    COUNT(*)>1
),
newest_line AS (
  SELECT
    miasa.sten_bill,
    stt.sten_paymentform,
    miasa.sten_tenderamount,
    miasa.sten_changeamount,
    stt.sten_isfiscal,
    stt.sten_accid,
    miasa.sten_id,
    stt.sten_map_user,
    stt.sten_storeid
  FROM
    max_id_and_summed_amounts miasa INNER JOIN sale_tender_t0 stt
  ON
    miasa.sten_id=stt.sten_id
),
deleted_rows AS (
  DELETE FROM
    sale_tender_t0
  WHERE
    sten_bill IN (
      SELECT
        sten_bill
      FROM
        max_id_and_summed_amounts
    )
)
INSERT INTO
  sale_tender_t0
SELECT
  *
FROM
  newest_line;

编辑：PostgreSQL版本8.4及更早版本不支持Common Table Expressions，因此您需要使用临时表。

CREATE TEMPORARY TABLE max_id_and_summed_amounts
  AS
SELECT
  sten_bill,
  SUM(sten_tenderamount) AS sten_tenderamount,
  SUM(sten_changeamount) AS sten_changeamount,
  MAX(sten_id) AS sten_id
FROM
  sale_tender_t0
GROUP BY
  sten_bill
HAVING
  COUNT(*)>1;

CREATE TEMPORARY TABLE newest_line
  AS
SELECT
  miasa.sten_bill,
  stt.sten_paymentform,
  miasa.sten_tenderamount,
  miasa.sten_changeamount,
  stt.sten_isfiscal,
  stt.sten_accid,
  miasa.sten_id,
  stt.sten_map_user,
  stt.sten_storeid
FROM
  max_id_and_summed_amounts miasa INNER JOIN sale_tender_t0 stt
ON
  miasa.sten_id=stt.sten_id;

DELETE FROM
  sale_tender_t0
WHERE
  sten_bill IN (
    SELECT
      sten_bill
    FROM
      max_id_and_summed_amounts
  );

INSERT INTO
  sale_tender_t0
SELECT
  *
FROM
  newest_line;

DROP TABLE max_id_and_summed_amounts;
DROP TABLE newest_line;

合并表格中的行。 PostgreSQL的

1 个答案: