MYSQL UNION和ORDER BY不工作

我有一个MySQL查询是如下MYSQL UNION和ORDER BY不工作

(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

查询是givng错误，T

Table 'order_product' from one of the SELECTs cannot be used in global ORDER clause

我查MySQL手册，但我没有任何线索，任何帮助都会非常棒。

来源

2011-03-16 Amitabh

 
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

btw：没有必要将UNION的各个SELECT放入括号中。

来源

2011-03-16 15:54:34

另外一个针对不必要的括号战斗。 – 2011-03-16 15:55:50

感谢这工作完美！括号是试验和错误过程的一部分，我在发布之前尝试了各种组合。现在我需要解决t的谜团:) – Amitabh 2011-03-16 16:21:39

@ pillar.of.autumn：'t'是内部查询的别名。 – 2011-03-16 16:23:11

尝试的

order by op_name

代替

ORDER BY order_product.op_name

来源

2011-03-16 15:55:04

尝试下面的语法？

SELECT 
    x, y 
FROM 
(
    SELECT x, y FROM z 
    UNION 
    SELECT a, b FROM c 
) 
ORDER BY 
    x, y

来源

2011-03-16 15:55:33 MatBailie

太棒了！只需要一个子查询别名，它是完美的 – bernie 2011-03-16 15:56:25

SELECT * 
FROM (SELECT order_product.op_id, 
     ... 
     FROM 
     ...) 
     UNION 
     (SELECT order_product.op_id, 
     ... 
     FROM order_product 
     ...) U 
ORDER BY op_name;

来源

2011-03-16 15:57:55

MYSQL UNION和ORDER BY不工作

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