相关疑难解决方法(0)

以下查询:

SELECT
year, id, rate
FROM h
WHERE year BETWEEN 2000 AND 2009
AND id IN (SELECT rid FROM table2)
GROUP BY id, year
ORDER BY id, rate DESC

收益率:

year    id  rate
2006    p01 8
2003    p01 7.4
2008    p01 6.8
2001    p01 5.9
2007    p01 5.3
2009    p01 4.4
2002    p01 3.9
2004    p01 3.5
2005    p01 2.1
2000    p01 0.8
2001    p02 12.5
2004    p02 12.4
2002    p02 12.2
2003    p02 10.3
2000    p02 8.7
2006    p02 …

下面是我的表

表格1

+--------+----------+---------+  
| amount | make     | product |  
+--------+----------+---------+  
|    100 | Nokia    | Mobiles |   
|    300 | Samesung | Mobiles |   
|    700 | Micromax | Mobiles |   
|   1000 | Karbonn  | Mobiles |   
|    500 | Lava     | Mobiles |   
|    100 | Floyer   | Gift    |   
|    500 | Arichies | Gift    |   
|    300 | Feeling  | Gift    |   
+--------+----------+---------+  

现在我想为每种产品显示两个最高金额...

所以我想构建单个SQL查询,它给出了如下结果.

+--------+----------+---------+  
| amount | make     | product |  
+--------+----------+---------+  
| …

我收到错误,并未设置所有已命名的参数.以下是我的代码.

我的SqlQuery在mysql提示符下运行正常,你可以在问题SQL Query中引用模式

SELECT  t.*
FROM    (
    SELECT  @lim := 2,
            @cg := ''
    ) vars,
    (select * from Table1 order by product,amount, make)  t
WHERE   CASE WHEN @cg <> product THEN @r := @lim ELSE 1 END > 0
    AND (@r := @r - 1) >= 0
    AND (@cg := product) IS NOT NULL
ORDER BY
    product,amount, make

我的java代码

try {
             context.dbl.startTransaction();
             Session session = context.dbl.getSession();

             //String sqlQuery = "from com.infibeam.inventoryservice.dbObjects.PopularBrandDO";
             String sqlQuery = "SELECT …