Correction on the query: SELECT count(*) as count FROM userdata WHERE
status = 'A';
Sorry.
-Original Message-
From: Greer, Darren (MED)
Sent: Tuesday, January 08, 2002 10:20 AM
To: '[EMAIL PROTECTED]'
Subject: General Query time question
Hello all. I have a database which is around
Greer, Darren (MED) writes:
Correction on the query: SELECT count(*) as count FR
OM userdata WHERE
status = 'A';
Ah. That does make a difference. MySQL is of course
forced to go through all of your data, counting the
number of rows with status 'A'. I don't believe an
index would do you much
Stancescu [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 08, 2002 10:37 AM
To: Greer, Darren (MED)
Cc: '[EMAIL PROTECTED]'
Subject: Re: General Query time question
I'm just guessing here, but I suppose most of the char(1) fields are y/n
fields. If that's the case you should consider using
I didn't think/read far enough. One more attempt is due.
Correction on the query: SELECT count(*) as count FR
OM userdata WHERE
status = 'A';
I didn't see that it was on that column you had an index,
so forget I said 'of course'. Have you used EXPLAIN to
figure out if the index is
]
Subject: Re: General Query time question
I didn't think/read far enough. One more attempt is due.
Correction on the query: SELECT count(*) as count FR
OM userdata WHERE
status = 'A';
I didn't see that it was on that column you had an index,
so forget I said 'of course'. Have you used
Greer, Darren (MED) writes:
If I move the status to another table, and then wanted to get a count of
everyone who is of status 'A', how would that be any quicker? Would I
join the tables?
Communication error - reattempting.
I meant that if you want to get the count of the number of 'A's
I'm just guessing here, but I suppose most of the char(1) fields are y/n
fields. If that's the case you should consider using a single BIGINT and
flag those bits instead. That would considerably reduce the size of the
table on one hand and I guess it should improve things speed-wise as well.
