Question

我有2个表'table1'和'table2'。 table1有10,000条记录，table2有5,000条记录。两个表都有“RECORD_ID”列。 table2中的所有RECORD_ID都可以在table1中找到。

我想根据table1的“RECORD_ID”列更新table2的“PRICE”列。

update  table1 set PRICE = table2.PRICE where RECORD_ID = table2.RECORD_ID

我收到此错误消息：

SQL0206N“table2.PRICE”在使用它的上下文中无效 SQLSTATE = 42703

我正在使用DB2。

Answer 1

UPDATE table1 SET table1.price = (SELECT table2.price FROM table2 WHERE table2.record_id = table1.record_id)

Answer 2

你必须使用这样的连接：

UPDATE
Table1
SET
Table1.Column = T2.Column
FROM
Table1 T1
INNER JOIN
Table2 T2
ON 
T1.PK = T2.FK;

Answer 3

试试这个：

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基于另一个基于ID的表更新表列

3 个答案: