[英]SQL left Join Error on multiple JOIN
Here is my query
SELECT item.item, item.id as itemID,item.item_sku,O.serial_no,transaction.id, transaction.t_price, transaction.t_unit, transaction.total_amount, transaction.transaction_type, transaction.comment, transaction.created from transaction
LEFT JOIN item ON transaction.item_id = item.id
LEFT JOIN order O ON transaction.order_no=o.order_no
WHERE transaction_type='buy' ORDER BY transaction.created DESC
但它显示此错误..为什么?
ORDER
是保留字 ,因此您需要对其进行转义。 检查此Stackoverflow答案,以了解如何使用反引号转义查询中的保留字。
请检查以下一项:
SELECT item.item, item.id as itemID,item.item_sku,O.serial_no,transaction.id, transaction.t_price, transaction.t_unit, transaction.total_amount, transaction.transaction_type, transaction.comment, transaction.created
FROM transaction
LEFT JOIN item ON transaction.item_id = item.id
LEFT JOIN `order` O ON transaction.order_no = o.order_no
WHERE transaction_type='buy'
ORDER BY transaction.created DESC
使用ALIAS时,您可以编写较短的表格。
SELECT
i.item
, i.id as itemID
, i.item_sku
, o.serial_no
, t.id
, t.t_price
, t.t_unit
, t.total_amount
, t.transaction_type
, t.comment
, t.created
FROM transaction
LEFT JOIN item i ON t.item_id = i.id
LEFT JOIN `order` o ON t.order_no=o.order_no
WHERE transaction_type='buy'
ORDER BY t.created DESC;
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