MySQL GROUP_CONCAT并翻转两行

Question

I have table

id | industry_id | type | key
1        1           0    word1
2        1           1    word2
3        1           0    word3
4        1           1    word4
5        2           0    word5
6        2           1    hello
7        2           0    world

In result i need to get table

industry_id | title       | description
1           | word1 word3 | word2 word4
2           | word5 world | hello

It means that all words with type 0 go to title, with type 1 to description

For now i can get almost what i want with query (but still get 2 records for each industry)

SELECT industry_id, type, GROUP_CONCAT(`key` SEPARATOR ' ') AS TEXT FROM table GROUP BY industry_id, type

Answer 1

Try like this:

SELECT industry_id, type, 
  GROUP_CONCAT(if(type = 0,key,'') SEPARATOR ' ') AS title,
GROUP_CONCAT(if(type = 1,key,'') SEPARATOR ' ') AS description
   FROM table GROUP BY industry_id, type

Answer 2

SELECT industry_id
     , MAX(CASE WHEN type = 0 THEN text END) title
     , MAX(CASE WHEN type = 1 THEN text END) description
  FROM
     ( SELECT industry_id
            , type
            , GROUP_CONCAT(`key` SEPARATOR ' ') TEXT 
         FROM my_table 
        GROUP 
           BY industry_id
            , type
     ) x
 GROUP
    BY industry_id;

Consider renaming your key column!

Answer 3

You are grouping by industry_id, type so you will get 4 rows and two row for each industry id try this

SELECT industry_id, 
GROUP_CONCAT(CASE WHEN `type`=0 THEN `key` END SEPARATOR ' ') AS title,
GROUP_CONCAT(CASE WHEN `type`=1 THEN `key` END SEPARATOR ' ') AS description
FROM Table1 
GROUP BY industry_id

See Fiddle