Thanks for the tip for the index on multiple columns ! (I never do inserts
on this table so insert time doesn't matter)
Mys posgresql version is : PostgreSQL 7.2.1
Here are the results of the EXPLAIN ANALYZE you asked me to execute.
explain analyse select cp from base_aveugle where cp='69740' and effectif
between 1 and 50;
NOTICE: QUERY PLAN:
Index Scan using base_aveugle_cp_eff on base_aveugle
(cost=0.00..508.69 rows=126 width=32)
(actual time=0.27..11.56 rows=398 loops=1)
Total runtime: 11.77 msec
EXPLAIN
explain analyse select cp from base_aveugle where cp like '69%' and effectif
between 1 and 50 and naf like '24%' or naf like '25%';
NOTICE: QUERY PLAN:
Index Scan using base_aveugle_cp_eff_naf, base_aveugle_naf on
base_aveugle (cost=0.00..100001.89 rows=25245 width=32)
(actual time=4.40..353.69 rows=6905 loops=1)
Total runtime: 355.82 msec
EXPLAIN
thx ;)
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