Question

我的查询不适用于

的订单

(SELECT * FROM products WHERE ParentID=139 AND `Position`!=0 AND 
        (
        (69.1 * (lattitude- 53.84787)) *
        (69.1 * (lattitude- 53.84787))
        ) + (
        (69.1 * (longitude- (-1.77684)) * COS(53.84787 / 57.3)) *
        (69.1 * (longitude- (-1.77684)) * COS(53.84787 / 57.3))
        ) <  POW(5, 2) ORDER BY `Position` ASC) 

        UNION 

        (SELECT * FROM products WHERE ParentID=139 AND `Position`=0 AND 
        (
        (69.1 * (lattitude- 53.84787)) *
        (69.1 * (lattitude- 53.84787))
        ) + (
        (69.1 * (longitude- (-1.77684)) * COS(53.84787 / 57.3)) *
        (69.1 * (longitude- (-1.77684)) * COS(53.84787 / 57.3))
        ) <  POW(5, 2) ORDER BY
        ((
                (69.1 * (lattitude- 53.84787)) *
                (69.1 * (lattitude- 53.84787))
        ) + (
        (69.1 * (longitude- (-1.77684)) * COS(53.84787 / 57.3)) *
        (69.1 * (longitude- (-1.77684)) * COS(53.84787 / 57.3))
        )),`Position` ASC )

它没有按位置结果给我订单。
我希望首先所有结果都应该位置！= 0然后是所有0位置记录。

Answer 1

在中间查询或子查询中使用ORDER BY子句毫无意义。 MySQL不会在最终结果集上保留这样的顺序。

mysql顺序不包含0

1 个答案: