Hi Group,
Lets say table a has fields: id serial, name varchar(20) not null, and
somedata int not null.
I'll be doing lots of queries on this table so I'll want to define and
index. ( or two? ).
Some queries will only look up the name. Others will look up the name
depending on somedata.
If I were to define and index like this:
1) create index i on sometable ( name, somedata );
and another one like this:
2) create index i2 on sometable ( name );
Would that be better than defining only the first index?
What I am asking is:
Should I have an index devoted to just the name field, or
would that first index work just fine? I know that more indexes
means slower time on inserts.
Any suggestions appreciated.
-Dennis