I have a table
ID | LanguageID | Text
1 | 1 | Abc
1 | 2 | Def
I want to select data so that all rows with the same ID are grouped into one row and each text is selected into a column with the name of its LanguageID. In this particular example the result would be
[ID: 1, 1: 'Abc', 2: 'Def']
Can this be done? How? Thank you
I am using MySQL.
EDIT: Seems like the easiest thing to do is to write a script to merge the rows outside of the database.
EDIT2: I don't know what answer to accept since none works or meets the requirements above.
If you have a fixed number of language ids, then you can do this as:
select id,
max(case when LanguageId = 1 then text end) as "1",
max(case when LanguageId = 2 then text end) as "2",
max(case when LanguageId = 3 then text end) as "3"
from t
group by id;
If you don't know the language ids in advance, then you need to use dynamic SQL to construct the query and then prepare and execute it.
If languageid is dynamic:
select @s = concat('select id',
group_concat(concat(', max(case when LanguageId = ',
LanguageId,
' then text end) as "',
LanguageId, '"'
)
),
' from t group by id'
)
from (select distinct LanguageId from t) t;
PREPARE stmt1 FROM @s;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
select id, group_concat(languageid), group_concat(text)
from t
group by id
or
select id, group_concat(languageid, ':', text)
from t
group by id
select id, group_concat(languageid,':', text) as result
from table1
group by id
Check this out hope this is what you're looking for: http://sqlfiddle.com/#!2/159927/13
select id, group_concat(concat(languageid, ' ',text))
from t
group by id
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.