MySQL selecting multi ids values in one row - mysql

Question

Here is query:
SELECT
t1.id, t1.data, t1.invoice_nr, t3.tiekejas, t4.uzsakovas, t1.pard_suma, t1.pirk_suma,
t1.transporto_suma, t2.apm_id, t2.apm_data, t2.apm_suma, t2.tipas, t1.terminas,
t5.regionas, t6.imone, t1.masina, t7.vardas, t7.pavarde, t8.vardas, t8.pavarde
FROM
irasai t1
LEFT JOIN apmokejimai t2 ON t1.invoice_nr = t2.apm_invoice_nr
LEFT JOIN tiekejai t3 ON t1.tiekejas = t3.id
LEFT JOIN uzsakovai t4 ON t1.pirkejas = t4.id
LEFT JOIN regionai t5 ON t1.regionas = t5.id
LEFT JOIN transportas t6 ON t1.transporto_imone = t6.id
LEFT JOIN vadybininkai t7 ON t1.pard_vad = t7.id
LEFT JOIN vadybininkai t8 ON t1.pirk_vad = t8.id
GROUP BY t1.invoice_nr, t2.apm_id
ORDER BY t1.data, t1.invoice_nr
And the problem is that table t1 some columns(tiekejas, pirkejas, regionas, trasporto_imone, pard_vad, pirk_vad) is sets of ids(ex. 1,2,5 etc). This query returns value only of one id from set, I want to get it all in one row (every value in new line or separated by dot or something, I can split them later in program). For now I split them in program, but I was required to select them one by one from database, and that takes too much time, and programs working too slow then.
I hope there is a better solution for this. Thanks.
HERE IS SQL FIDDLE LINK: http://sqlfiddle.com/#!9/d8609/1
EDIT:
http://postimg.org/image/3sostf42n/
This what I need to get, defined column is t1.tiekejas (ex. 1,2,5), this ids have values in table t3 (tiekejai), by this query it only returns one value by id 1, but I need three values of ids 1,2,5 returned.

Answer 1

Your initial problem can be fixed using FIND_IN_SET:-
SELECT
t1.id, t1.data, t1.invoice_nr, t3.tiekejas, t4.uzsakovas, t1.pard_suma, t1.pirk_suma,
t1.transporto_suma, t2.apm_id, t2.apm_data, t2.apm_suma, t2.tipas, t1.terminas,
t5.regionas, t6.imone, t1.masina, t7.vardas, t7.pavarde, t8.vardas, t8.pavarde
FROM
irasai t1
LEFT JOIN apmokejimai t2 ON t1.invoice_nr = t2.apm_invoice_nr
LEFT JOIN tiekejai t3 ON FIND_IN_SET(t3.id, t1.tiekejas)
LEFT JOIN uzsakovai t4 ON FIND_IN_SET(t4.id, t1.pirkejas)
LEFT JOIN regionai t5 ON FIND_IN_SET(t5.id, t1.regionas)
LEFT JOIN transportas t6 ON FIND_IN_SET(t6.id, t1.transporto_imone)
LEFT JOIN vadybininkai t7 ON FIND_IN_SET(t7.id, t1.pard_vad)
LEFT JOIN vadybininkai t8 ON FIND_IN_SET(t8.id, t1.pirk_vad)
GROUP BY t1.invoice_nr, t2.apm_id
ORDER BY t1.data, t1.invoice_nr
However I think you are going to have issues with the multiple values from each joined table. Further you are using GROUP BY to eliminate the multiple rows, and which one of the various values for each column for a particular invoice_nr / apm_id that is chosen is not defined.
Note, also it is generally a bad idea to have a field containing a comma separated list of ids. It makes doing a join slow and harder than it should be (as indexes cannot effectively be used on the field), and it limits future increases in the data. It is generally a sign of a poorly normalised database design.