SQLite的 - 更新基於值從其他兩個表列列

Question

我試圖更新數據1的ID到RECORD2的ID時：

• 記錄1的和Record2的名稱是一樣的，和
• 重量大於記錄2。

記錄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 | 

數據1

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

我曾嘗試以下SQLite的查詢：

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) 

使用上面的查詢數據1的ID更新爲4的所有記錄。

注：記錄1的ID是數據1外鍵。

Answer 1

對於給定的數據設置以下似乎有助於原因：

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) 
; 

看到它在行動：SQL Fiddle。

請評論如果和因爲這需要調整/進一步的細節。