indexing
| От | James Cooper |
|---|---|
| Тема | indexing |
| Дата | |
| Msg-id | 006a01c2dc48$94d665f0$c900a8c0@jax обсуждение исходный текст |
| Ответы |
Re: indexing
|
| Список | pgsql-sql |
Hi all,
I've been doing a little reading on indexing in prelude to indexing my db.
I have the following to ask:
if I had three tables for a many to many relationship say A, B, AND C
B being the lookup. B being a huge 50k rows plus column and made just two forigen keys(b.a_id,b.c_id).
is it best to create two non-unique indexes or one unique index on both fields?
Please advise
Ps
I also attempted creating an index on a table i have called person on person_id and
ran
Explain
select person_id from person where person_id < n
but saw no results of my created index being used - am i doing something incorrectly
Pps
When indexing if searching tables is more important than concurrency - which type of index is best?
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