我有一个可能是一个简单的问题。我的表是一个月内的发票集合。我的表中的ship_to_state列仅显示每张发票上一行的实际发货状态。我需要更新我的表，以便为该发票上的每个GL帐户行项目显示发货到州的值。现在，它只出现在我的12000-99 GL帐户中。
这是我当前的查询：
UPDATE INVOICES
SET SHIP_TO_STATE =
(SELECT SHIP_TO_STATE FROM INVOICES WHERE GL_ACCOUNT_ID = '12000-99'
AND INVOICES.INVOICE_ID = INVOICES.INVOICE_ID);
这是我的表：
CUSTOMER_ID INVOICE_ID ITEM_ID GL_ACCOUNT_ID SHIP_TO_STATE
Customer1 38441 ADM 46000-99
Customer1 38441 ADM 12000-99 GA
Customer2 42809 GSD307 40100-02
Customer2 42809 GSD310 40100-01
Customer2 42809 GSW311 40100-01
Customer2 42809 GSD200 40100-01
Customer2 42809 FSR270 40100-02
Customer2 42809 ADM 12000-99 WA
Customer3 42810 GSS10-100 40100-01
Customer3 42810 GSS10-500 40100-05
Customer3 42810 GSD210 40100-01
Customer3 42810 ADM 45100-99
Customer3 42810 ADM 12000-99 AL
Customer4 42811 PSG550-L 40100-02
Customer4 42811 PSG550-M 40100-02
Customer4 42811 ADM 12000-99 GA
Customer5 42812 GSS10-100 40100-01
Customer5 42812 GSS10-350 40100-05
Customer5 42812 GSD200 40100-01
Customer5 42812 ADM 12000-99 NC
Customer6 42813 FSF105 40100-02
Customer6 42813 FSF135 40100-02
Customer6 42813 GSD310 40100-01
Customer6 42813 GSW311 40100-01
Customer6 42813 GSD190 40100-01
Customer6 42813 GSW312 40100-01
Customer6 42813 ADM 45100-99
Customer6 42813 ADM 12000-99 TX
我期待着您的反馈。感谢。
答案 0 :(得分：1)
UPDATE INVOICES
SET SHIP_TO_STATE =
(SELECT MAX(SHIP_TO_STATE) FROM INVOICES i WHERE i.INVOICE_ID = INVOICES.INVOICE_ID);
每个发票ID只返回一条记录，并修复了其他地方提到的别名问题。如果没有ship_to_state值，则它将使用NULL更新。如果有多个，它将按字母顺序选择后一个 - 如果这是一个问题，有办法解决。
答案 1 :(得分：0)
您可以使用MERGE语句（语法比通过连接或相关子查询更新更清晰）。下面的解决方案假设在当前表格中，每个invoice_id只有一个非空值。
语法可能有点过时（你没有提供测试数据*）。 * 我的意思是，没有CREATE TABLE和INSERT语句。
merge into invoices i
using ( select invoice_id, ship_to_state
from invoices
where ship_to_state is not null ) s
on (i.invoice_id = s.invoice_id)
when matched then update
set i.ship_to_state = s.ship_to_state
where i.ship_to_state is null
答案 2 :(得分：0)
Oracle安装程序：
CREATE TABLE INVOICES ( CUSTOMER_ID, INVOICE_ID, ITEM_ID, GL_ACCOUNT_ID, SHIP_TO_STATE ) AS
SELECT 'Customer1', 38441, 'ADM', '46000-99', NULL FROM DUAL UNION ALL
SELECT 'Customer1', 38441, 'ADM', '12000-99', 'GA' FROM DUAL UNION ALL
SELECT 'Customer2', 42809, 'GSD307', '40100-02', NULL FROM DUAL UNION ALL
SELECT 'Customer2', 42809, 'GSD310', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer2', 42809, 'GSW311', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer2', 42809, 'GSD200', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer2', 42809, 'FSR270', '40100-02', NULL FROM DUAL UNION ALL
SELECT 'Customer2', 42809, 'ADM', '12000-99', 'WA' FROM DUAL UNION ALL
SELECT 'Customer3', 42810, 'GSS10-100', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer3', 42810, 'GSS10-500', '40100-05', NULL FROM DUAL UNION ALL
SELECT 'Customer3', 42810, 'GSD210', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer3', 42810, 'ADM', '45100-99', NULL FROM DUAL UNION ALL
SELECT 'Customer3', 42810, 'ADM', '12000-99', 'AL' FROM DUAL UNION ALL
SELECT 'Customer4', 42811, 'PSG550-L', '40100-02', NULL FROM DUAL UNION ALL
SELECT 'Customer4', 42811, 'PSG550-M', '40100-02', NULL FROM DUAL UNION ALL
SELECT 'Customer4', 42811, 'ADM', '12000-99', 'GA' FROM DUAL UNION ALL
SELECT 'Customer5', 42812, 'GSS10-100', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer5', 42812, 'GSS10-350', '40100-05', NULL FROM DUAL UNION ALL
SELECT 'Customer5', 42812, 'GSD200', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer5', 42812, 'ADM', '12000-99', 'NC' FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'FSF105', '40100-02', NULL FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'FSF135', '40100-02', NULL FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'GSD310', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'GSW311', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'GSD190', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'GSW312', '40100-01', NULL FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'ADM', '45100-99', NULL FROM DUAL UNION ALL
SELECT 'Customer6', 42813, 'ADM', '12000-99', 'TX' FROM DUAL;
<强>更新：
MERGE INTO invoices dst
USING ( SELECT MAX( SHIP_TO_STATE ) OVER ( PARTITION BY invoice_id )
AS new_ship_to_state
FROM invoices ) src
ON ( src.ROWID = dst.ROWID )
WHEN MATCHED THEN
UPDATE SET ship_to_state = src.new_ship_to_state;
<强>结果：
SELECT * FROM invoices;
CUSTOMER_ INVOICE_ID ITEM_ID GL_ACCOU SH
--------- ---------- --------- -------- --
Customer1 38441 ADM 46000-99 GA
Customer1 38441 ADM 12000-99 GA
Customer2 42809 GSD307 40100-02 WA
Customer2 42809 GSD310 40100-01 WA
Customer2 42809 GSW311 40100-01 WA
Customer2 42809 GSD200 40100-01 WA
Customer2 42809 FSR270 40100-02 WA
Customer2 42809 ADM 12000-99 WA
Customer3 42810 GSS10-100 40100-01 AL
Customer3 42810 GSS10-500 40100-05 AL
Customer3 42810 GSD210 40100-01 AL
Customer3 42810 ADM 45100-99 AL
Customer3 42810 ADM 12000-99 AL
Customer4 42811 PSG550-L 40100-02 GA
Customer4 42811 PSG550-M 40100-02 GA
Customer4 42811 ADM 12000-99 GA
Customer5 42812 GSS10-100 40100-01 NC
Customer5 42812 GSS10-350 40100-05 NC
Customer5 42812 GSD200 40100-01 NC
Customer5 42812 ADM 12000-99 NC
Customer6 42813 FSF105 40100-02 TX
Customer6 42813 FSF135 40100-02 TX
Customer6 42813 GSD310 40100-01 TX
Customer6 42813 GSW311 40100-01 TX
Customer6 42813 GSD190 40100-01 TX
Customer6 42813 GSW312 40100-01 TX
Customer6 42813 ADM 45100-99 TX
Customer6 42813 ADM 12000-99 TX
答案 3 :(得分：-1)
您正在使用相关子查询。您需要一个或多个表别名：
UPDATE INVOICES
SET SHIP_TO_STATE = (SELECT i.SHIP_TO_STATE
FROM INVOICES i
WHERE i.GL_ACCOUNT_ID = '12000-99' AND
i.INVOICE_ID = INVOICES.INVOICE_ID
);
您是否应该将此信息存储在每个invoice_id有一行的表中？奇怪的是，这样的id将在名为INVOICES的表中重复。