根据由并集子句进行的联接更新表列

Question

我需要更新表historydata并将一些ID放入新列。标识存在于两个单独的表，托盘和pallets_archive中。我该怎么做呢？我使用的是MySQL 6.3。

这就是我所拥有的-

UPDATE hd
SET hd.palletIdx = allPallets.idx
FROM historicdata as hd
INNER JOIN (SELECT idx, palletBarcode FROM pallets UNION ALL 
SELECT idx, palletBarcode FROM pallets_archive) as 
allPallets ON hd.palletFullCode = allPallets.palletBarcode

但是它一直在抱怨。

Answer 1

您可以尝试以下吗？

UPDATE hd
INNER JOIN (SELECT idx, palletBarcode FROM pallets UNION ALL 
SELECT idx, palletBarcode FROM pallets_archive) as 
allPallets ON hd.palletFullCode = allPallets.palletBarcode
SET hd.palletIdx = allPallets.idx