SQLite的 - 更新基于值从其他两个表列列

Question

我试图更新数据1的ID到RECORD2的ID时：

• 记录1的和Record2的名称是一样的，和
• 重量大于记录2。

记录1

| ID | Weight | Name | 
|----|--------|------| 
| 1 |  10 | a | 
| 2 |  10 | b | 
| 3 |  10 | c | 

RECORD2

| ID | Weight | Name | 
|----|--------|------| 
| 4 |  20 | a | 
| 5 |  20 | b | 
| 6 |  20 | c | 

数据1

| ID | Weight | 
|----|--------| 
| 4 |  40 | 
| 5 |  40 | 

我曾尝试以下SQLite的查询：

update data1 
set id = 
    (select record2.id 
    from record2,record1 
    where record1.name=record2.name 
    and record1.weight<record2.weight) 
where id in 
    (select record1.id 
    from record1, record2 
    where record1.name=record2.name 
    and record1.weight<record2.weight) 

使用上面的查询数据1的ID更新为4的所有记录。

注：记录1的ID是数据1外键。

Answer 1

对于给定的数据设置以下似乎有助于原因：

update data1 
set id = 
    (select record2.id 
    from record2,record1 
    where 
    data1.id = record1.id 
    and record1.name=record2.name 
    and record1.weight<record2.weight) 
where id in 
    (select record1.id 
    from record1, record2 
    where 
    record1.id in (select id from data1) 
    and record1.name=record2.name 
    and record1.weight<record2.weight) 
; 

看到它在行动：SQL Fiddle。

请评论如果和因为这需要调整/进一步的细节。