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mysql un indekss uz teksta lauku


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Posted

Man ir db tabulā lauks - parasti kādi 30-40 simboli.

Ļoti bieži tiek meklēti dati pēc šī lauka sākuma.

 

Piemēram, SELECT * FROM tabula WHERE lauks like 'Abr%'

Piemēram, SELECT * FROM tabula WHERE lauks like 'Ca%'

utt.

 

Tā kā datu ir daudz, tad kā es saprotu, būtu labi kādu indeksu pielikt uz šī lauka.

Kādu indeksu lietderīgi šādam gadījumam?

 

R.

Posted (edited)

Lauks ir unikāls? Unique indekss?

Varbūt tas lauks raksturo tabulas ierakstus? Primary key ?

 

Kāds ir lauka tips?

Edited by briedis

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