1

有人请帮我解决我已经为此花了两天时间的 sql 查询....

我有一个下面给出的MYSQL查询

(SELECT
  c.cl_list as cl_list,
  c.name as name,
  pc.value as value,
  count( pc.value) as total
FROM
  projs p 
  LEFT JOIN classify_proj_new pc 
    ON p.proj_id = pc.proj_id_fk
  LEFT JOIN classify_list c 
    ON c.cl_list = pc.class_id_fk
WHERE
  MATCH ( p.title ) AGAINST ( 'jerm'  IN BOOLEAN MODE )
GROUP BY 
  c.cl_list,
  pc.value)
UNION ALL
(SELECT
  c.cl_list as cl_list,
  c.name as name,
  pc.value as value,
  count( pc.value) as total
FROM
  jerm p 
  LEFT JOIN classify_jerm_new pc
    ON p.jerm_id = pc.jerm_id_fk
  LEFT JOIN classify_list c
    ON c.cl_list = pc.class_id_fk
WHERE
  MATCH ( p.jermname ) AGAINST ( 'jerm'  IN BOOLEAN MODE )
GROUP BY
  c.cl_list,
  pc.value)

这给出了（下）的结果：

  cl_list      name              value        total
------------------------------------------------------------------------------------
    1       department         jewller          2
    3       price                 50            2
    6       color                blue           1
    6       color                Red            2
    1       department         jewller          1
    6       color                Red            1

但我试图得到一个结果，它可以添加重复值的总数并避免重复值....这样的事情（如下）：

  cl_list      name              value        total
------------------------------------------------------------------------------------
    1       department         jewller          3
    3       price                 50            2
    6       color                blue           1
    6       color                Red            3

有人请帮助我，我对我的输出感到非常难过...

非常感谢您提前...

4

3 回答 3

3

从您的查询中选择并按 cl_list、名称和值分组：

SELECT
  cl_list,
  name,
  value,
  sum(total) as total
FROM (
  -- your current query here ...
) data
GROUP BY
  cl_list,
  name,
  value
于 2013-01-29T10:05:18.030 回答
1

试试下面的代码。它将显示唯一的记录并避免重复。

GROUP BY c.name
于 2013-01-29T10:03:19.207 回答
0

group名称和值的结果 

(SELECT c.cl_list as cl_list, c.name as name, pc.value as value, count( pc.value) as total
FROM projs p 
LEFT JOIN classify_proj_new pc ON p.proj_id = pc.proj_id_fk
LEFT JOIN classify_list c ON c.cl_list = pc.class_id_fk
WHERE MATCH ( p.title ) AGAINST ( 'jerm'  IN BOOLEAN MODE )
GROUP BY c.name, pc.value)
UNION ALL
(SELECT  c.cl_list as cl_list, c.name as name, pc.value as value, count( pc.value) as total
 FROM jerm p 
 LEFT JOIN classify_jerm_new pc ON p.jerm_id = pc.jerm_id_fk
 LEFT JOIN classify_list c ON c.cl_list = pc.class_id_fk
 WHERE MATCH ( p.jermname ) AGAINST ( 'jerm'  IN BOOLEAN MODE )
 GROUP BY c.name, pc.value)
于 2013-01-29T10:05:10.033 回答