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Iedomājieties datubāzes tabulas kollonā glabājās implodēti id piemēram

 

pattern_id    =  1,2,3,4,5,6,7

 

,bet es vēlos lai vaicājums pārbauda vai pattern_id šūnās norādītā skaitļu virtne sakristu ar kādu no skaitļiem kkā ta

 

WHERE `pattern_id` IN ('6, 5, 4, 3, 2'),
 

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šeit prasās pēc normalizācijas.
Izveido tabulu:
 
objects_patterns
-----
object_id
pattern_id
 
un katram objekta priekš katra paterna izveido ierakstu.
Tālāk atlase jau pavisam vienkārša.
 

SELECT * 
FROM objects_patterns op
LEFT JOIN objects o
ON op.object_id=o.id
WHERE op.pattern_id IN (2,4,6,7,8)
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šeit prasās pēc normalizācijas.

Izveido tabulu:

 

objects_patterns

-----

object_id

pattern_id

 

un katram objekta priekš katra paterna izveido ierakstu.

Tālāk atlase jau pavisam vienkārša.

 

SELECT * 
FROM objects_patterns op
LEFT JOIN objects o
ON op.object_id=o.id
WHERE op.pattern_id IN (2,4,6,7,8)

Jā paldies - Cepums atrisināts :)

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