根据另一个表中的条件更新一个表中的列

Question

我正在使用postgresql。两个表都有备注列。当我运行这个时，我得到一个错误，指出未找到列inv。

UPDATE inventory SET INV.REMARKS = INV.REMARKS || ', $A'
FROM  priceguide_inventory pg, inventory INV
WHERE (INV.Lot_ID = pg.Lot_ID)
AND INV.Condition = 'New'

Answer 1

您的语法已关闭，请尝试此操作：

UPDATE inventory AS inv
SET REMARKS = REMARKS || ', $A'
FROM priceguide_inventory AS pg
WHERE inv.Lot_ID = pg.Lot_ID AND
      inv.Condition = 'New'

检查更新加入synatax的documentation。

Answer 2

UPDATE inventory 
SET REMARKS = REMARKS || ', $A'
FROM  priceguide_inventory pg
WHERE inventory.Lot_ID = priceguide_inventory.Lot_ID AND 
      inventory.Condition = 'New'

Answer 3

UPDATE a SET Remarks=b.Remarks || ',$A' FROM inventory a JOIN priceguide_inventory b ON a.Lot_ID = b.Lot_ID WHERE a.condition='New'