[英]MYSQL UNION and ORDER BY not working
我有一個mysql查詢,如下所示
(SELECT order_product.op_id,
order_product.ocat_id,
order_product.op_partnunber,
order_product.op_name,
order_product.op_upc,
order_product.op_desc,
order_stockavailable.osa_id,
order_stockavailable.of_id,
order_stockavailable.osa_stocka,
order_category.ocat_name
FROM
order_product
LEFT JOIN order_category
ON order_product.ocat_id = order_category.ocat_id
LEFT JOIN order_stockavailable
ON order_product.op_id = order_stockavailable.op_id)
UNION
(SELECT order_product.op_id,
order_product.ocat_id,
order_product.op_partnunber,
order_product.op_name,
order_product.op_upc,
order_product.op_desc,
order_stockavailable_attributes.id,
order_stockavailable_attributes.of_id,
order_stockavailable_attributes.opap_stock,
order_category.ocat_name
FROM order_product
LEFT JOIN order_category
ON order_product.ocat_id = order_category.ocat_id
LEFT JOIN order_stockavailable
ON order_product.op_id = order_stockavailable.op_id
LEFT JOIN order_stockavailable_attributes
ON order_product.op_id = order_stockavailable_attributes.op_id)
ORDER BY order_product.op_name
查詢是givng錯誤,T
Table 'order_product' from one of the SELECTs cannot be used in global ORDER clause
我檢查了MYSQL手冊,但沒有得到任何線索,任何幫助都會非常棒。
SELECT * FROM ( SELECT order_product.op_id, order_product.ocat_id, order_product.op_partnunber, order_product.op_name, order_product.op_upc, order_product.op_desc, order_stockavailable.osa_id, order_stockavailable.of_id, order_stockavailable.osa_stocka, order_category.ocat_name FROM order_product LEFT JOIN order_category ON order_product.ocat_id = order_category.ocat_id LEFT JOIN order_stockavailable ON order_product.op_id = order_stockavailable.op_id UNION SELECT order_product.op_id, order_product.ocat_id, order_product.op_partnunber, order_product.op_name, order_product.op_upc, order_product.op_desc, order_stockavailable_attributes.id, order_stockavailable_attributes.of_id, order_stockavailable_attributes.opap_stock, order_category.ocat_name FROM order_product LEFT JOIN order_category ON order_product.ocat_id = order_category.ocat_id LEFT JOIN order_stockavailable ON order_product.op_id = order_stockavailable.op_id LEFT JOIN order_stockavailable_attributes ON order_product.op_id = order_stockavailable_attributes.op_id ) t ORDER BY op_name
順便說一句:沒有必要將UNION的各個SELECT放入括號中。
請嘗試以下語法?
SELECT
x, y
FROM
(
SELECT x, y FROM z
UNION
SELECT a, b FROM c
)
ORDER BY
x, y
嘗試
order by op_name
代替
ORDER BY order_product.op_name
SELECT *
FROM (SELECT order_product.op_id,
...
FROM
... )
UNION
(SELECT order_product.op_id,
...
FROM order_product
... ) U
ORDER BY op_name;
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