查询替换来自连接表的查找字符串

Question

我有一个有点复杂的查询连接多个表，我有一个“列”结果是其他列的串联。现在，我需要获取这个并置的结果，并在查找表中查找此值，并返回相关的正确字符串，以替换原始字符串（如果有匹配的值）。

编辑：我创建了一个SQL小提琴帮助。 http://sqlfiddle.com/#!2/209437/1

这是到目前为止我的查询：

SELECT prices.part_no AS sku, CONCAT_WS(' | ', GROUP_CONCAT(DISTINCT cat.`category` SEPARATOR ' | '), GROUP_CONCAT(DISTINCT CONCAT_WS(' > ', c.`section_code`, c.`lev1_subcategory_name`, c.`lev2_subcategory_name`, c.`lev3_subcategory_name`) SEPARATOR ' | ')) AS category 
FROM parts_file_prices AS prices 
LEFT JOIN parts_file_content AS c on prices.`part_no` = c.`part_no` AND prices.`batch_id` = c.`batch_id` 
LEFT JOIN parts_file_categories AS cat on prices.`part_no` = cat.`part_no` 
WHERE prices.`batch_id` = 1 AND (c.`catalog_part_description` IS NOT NULL AND c.`catalog_part_description` != '') 
GROUP BY sku 
ORDER BY prices.`part_no` asc LIMIT 5; 

下面是结果：

+---------+-----------------------------------------------------------------------------------------------------------------------------------------+ 
| sku  | category                                | 
+---------+-----------------------------------------------------------------------------------------------------------------------------------------+ 
| 11-2000 | Best Selling > Test | Best Selling > Test 2 | Best Selling > Test > Test Sub | 2 > Books & CD's > Technical Books | 2 > Technical Books | 
| 11-3000 | 2 > Books & CD's > Technical Books | 2 > Technical Books                    | 
| 11-8006 | 2 > Books & CD's                              | 
| 11-8033 | 2 > Books & CD's > Log/Record Books | 2 > Log/Record Books                    | 
| 11-8034 | 2 > Books & CD's > Log/Record Books | 2 > Log/Record Books                    | 
+---------+-----------------------------------------------------------------------------------------------------------------------------------------+ 

我从来没有要求一个SQL问题，所以如果需要更多的信息，请说出来。 我需要在我的表parts_file_category_overrides中查找这个级联值“2> Books & CD> Technical Books”，并将该表中的替换值返回到我的结果行中。

我结束结果需要看起来像这样：

+---------+-----------------------------------------------------------------------------------------------------------------------------------------+ 
| sku  | category                                | 
+---------+-----------------------------------------------------------------------------------------------------------------------------------------+ 
| 11-2000 | Best Selling > Test | Best Selling > Test 2 | Best Selling > Test > Test Sub | Inside Living > Books         | 
| 11-3000 | Inside Living > Books                             | 
| 11-8006 | Inside Living > Books                             | 
| 11-8033 | Inside Living > Books                             | 
| 11-8034 | Inside Living > Books                             | 
+---------+-----------------------------------------------------------------------------------------------------------------------------------------+ 

这里是我的表了一些数据：

mysql> SELECT * FROM parts_file_prices LIMIT 5; 
+----+----------+---------+--------------------------+--------------+-----------------+--------------+ 
| id | batch_id | part_no | description    | dealer_price | manufacturer_no | upc   | 
+----+----------+---------+--------------------------+--------------+-----------------+--------------+ 
| 1 |  1 | 11-2000 | TRAILER/FIFTH WHEEL BOOK |   4.66 | A02-2000  | 019079200020 | 
| 2 |  1 | 11-3000 | MOTOR HOME BOOK   |   4.66 | A02-3000  | 019079200037 | 
| 3 |  1 | 11-8006 | "MOM'S CAMPER COOKING" |   6.65 | MOMS   | 799530378986 | 
| 4 |  1 | 11-8033 | CAMPER'S DAILY LOG  |   9.54 | NULL   | 831196001522 | 
| 5 |  1 | 11-8034 | DAILY LOG REFILL   |   4.86 | NULL   | 831196001546 | 
+----+----------+---------+--------------------------+--------------+-----------------+--------------+ 

mysql> SELECT * FROM parts_file_content LIMIT 5; 
+----+----------+---------+--------------+-----------------------+-----------------------+-----------------------+-----------------+--------------+----------------------------------------+--------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------+--------+-------+--------+--------------------------+----------------------------------+----------------+--------------+----------------+ 
| id | batch_id | part_no | section_code | lev1_subcategory_name | lev2_subcategory_name | lev3_subcategory_name | group_name  | mfg_part_num | catalog_part_description    | weight | text_body                                          | 250_image_location  | length | width | height | manufacturer    | logo_location     | b2ccategory | subcategory1 | subcategory2 | 
+----+----------+---------+--------------+-----------------------+-----------------------+-----------------------+-----------------+--------------+----------------------------------------+--------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------+--------+-------+--------+--------------------------+----------------------------------+----------------+--------------+----------------+ 
| 1 |  1 | 11-2000 |   2 | Books & CD's   | Technical Books  | NULL     | RVing Made Easy | A02-2000  | RVing Made Easy, Trailers/Fifth Wheels | 0.190 | Written by a long-time RVer who shares his experience, covers important operating and safety features. Hints follow each section listing do's and don'ts. 48 pages. Priced each. | 112/250/112000_silo.jpg | 0.25 | 5.50 | 8.38 | VALTERRA PRODUCTS, INC. | Null        | Inside Your RV | BOOKS  | RV MAINTENANCE | 
| 2 |  1 | 11-2000 |   2 | Books & CD's   | Technical Books  | NULL     | RVing Made Easy | A02-2000  | RVing Made Easy, Trailers/Fifth Wheels | 0.190 | Written by a long-time RVer who shares his experience, covers important operating and safety features. Hints follow each section listing do's and don'ts. 48 pages. Priced each. | 112/250/112000_silo.jpg | 0.25 | 5.50 | 8.38 | VALTERRA PRODUCTS, INC. | 009050/weblogo/valterra_silo.jpg | Inside Your RV | BOOKS  | RV MAINTENANCE | 
| 3 |  1 | 11-2000 |   2 | Technical Books  | NULL     | NULL     | RVing Made Easy | A02-2000  | RVing Made Easy, Trailers/Fifth Wheels | 0.190 | Written by a long-time RVer who shares his experience, covers important operating and safety features. Hints follow each section listing do's and don'ts. 48 pages. Priced each. | 112/250/112000_silo.jpg | 0.25 | 5.50 | 8.38 | VALTERRA PRODUCTS, INC. | Null        | Inside Your RV | BOOKS  | RV MAINTENANCE | 
| 4 |  1 | 11-2000 |   2 | Technical Books  | NULL     | NULL     | RVing Made Easy | A02-2000  | RVing Made Easy, Trailers/Fifth Wheels | 0.190 | Written by a long-time RVer who shares his experience, covers important operating and safety features. Hints follow each section listing do's and don'ts. 48 pages. Priced each. | 112/250/112000_silo.jpg | 0.25 | 5.50 | 8.38 | VALTERRA PRODUCTS, INC. | 009050/weblogo/valterra_silo.jpg | Inside Your RV | BOOKS  | RV MAINTENANCE | 
| 5 |  1 | 11-3000 |   2 | Books & CD's   | Technical Books  | NULL     | RVing Made Easy | A02-3000  | RVing Made Easy, Motorhomes   | 1.000 | Written by a long-time RVer who shares his experience, covers important operating and safety features. Hints follow each section listing do's and don'ts. 48 pages. Priced each. | 113/250/113000_silo.jpg | 0.13 | 5.50 | 8.50 | VALTERRA PRODUCTS, INC. | Null        | Inside Your RV | BOOKS  | RV MAINTENANCE | 
+----+----------+---------+--------------+-----------------------+-----------------------+-----------------------+-----------------+--------------+----------------------------------------+--------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------+--------+-------+--------+--------------------------+----------------------------------+----------------+--------------+----------------+ 

mysql> SELECT * FROM parts_file_categories LIMIT 5; 
+----+---------+--------------------------------+ 
| id | part_no | category      | 
+----+---------+--------------------------------+ 
| 1 | 11-2000 | Best Selling > Test   | 
| 2 | 11-2000 | Best Selling > Test 2   | 
| 3 | 11-2000 | Best Selling > Test   | 
| 4 | 11-2000 | Best Selling > Test > Test Sub | 
+----+---------+--------------------------------+ 

mysql> SELECT * FROM parts_file_category_overrides LIMIT 5; 
+----+-------------------------------------+-----------------------+ 
| id | search        | replace    | 
+----+-------------------------------------+-----------------------+ 
| 1 | 2 > Books & CD's > Technical Books | Inside Living > Books | 
| 2 | 2 > Technical Books     | Inside Living > Books | 
| 3 | 2 > Books & CD's > Log/Record Books | Inside Living > Books | 
| 4 | 2 > Log/Record Books    | Inside Living > Books | 
| 5 | 2 > Books & CD's     | Inside Living > Books | 
+----+-------------------------------------+-----------------------+ 

Answer 1

你可以使用子查询和尝试是这样的：

select sku, case when o.replace is not null then o.replace else category end as category      
FROM (
SELECT prices.part_no AS sku, CONCAT_WS(' | ', GROUP_CONCAT(DISTINCT cat.`category` SEPARATOR ' | '), GROUP_CONCAT(DISTINCT CONCAT_WS(' > ', c.`section_code`, c.`lev1_subcategory_name`, c.`lev2_subcategory_name`, c.`lev3_subcategory_name`) SEPARATOR ' | ')) AS category 
FROM parts_file_prices AS prices 
LEFT JOIN parts_file_content AS c on prices.`part_no` = c.`part_no` AND prices.`batch_id` = c.`batch_id` 
LEFT JOIN parts_file_categories AS cat on prices.`part_no` = cat.`part_no` 
WHERE prices.`batch_id` = 1 AND (c.`catalog_part_description` IS NOT NULL AND c.`catalog_part_description` != '') 
GROUP BY sku 
ORDER BY prices.`part_no` asc) 
as test LEFT JOIN parts_file_category_overrides AS o on o.`search` = category COLLATE utf8_unicode_ci; 

结果：

+-----------------------------------------------------------------------------------------------------------------------------------------------------+ 
|SKU  | CATEGORY 
|11-2000 | Best Selling > Test | Best Selling > Test 2 | Best Selling > Test > Test Sub | 2 > Books & CD's > Technical Books | 2 > Technical Books 
|11-3000 | Inside Living > Books 
+-----------------------------------------------------------------------------------------------------------------------------------------------------+ 

如果您的外键parts_file_category_overrides不是来自大量列的concatinated，您可能会更容易。