"David Witham" <[EMAIL PROTECTED]> writes:
> select * from tariff
> where tariff_type = 'UIA'
> and prefix in ('44','441','4412','44123','441234','4412345','44123456')
> order by prefix desc limit 1;
> The query doesn't use the primary key index as I might expect:
Flip the index column order ---
Hi all,
I have a table containing tariff information. It has a primary key (and therefore
unique index) of (tariff_type varchar(5),prefix varchar(12)) where tariff_type is a
set of rates assigned to dialling prefixes.
e.g.
tariff_type prefix rate
abc 44 $x
abc 4
