SELECT SUM( bool_was_connected=1 ) AS was_connected,
SUM( bool_was_connected=0 ) AS was_not_connected, etc...
b.
[EMAIL PROTECTED] wrote:
Evening Gurus,
I have a small problem that I've beaten to death the past 2 days. I am
trying to get the value of a row, and update another table
Thankyou kindly Bill. Just to verify, SUM adds up values. My data
is only 1 or 0. I used SUM as an example, the below query you recommend
will count all 'rows' which are 0, thus returning a number which
represents how many 0's were found?
Thankyou for the fast reply,
Calvin
On Thu, 30 Aug 2001,
Calvin,
Maybe I'm just confused (fairly likely), but it appears that you are
confusing 'null' with zero. If you actually want to count all values
including nulls, COUNT(*) will do it. If you want to count NON nulls,
COUNT(a_field_name) does it. SUM(a_field_name) returns the sum of all
Yes.
A feature of MySQL is that it returns 1 for true and 0 for false. When you
select ... you can put logic tests and sum up the number of true values. In the
case of bool_was_connected=0 will have a value of 1 when it is true and then
you sum up the results.
You could also do something
Evening Jay,
I'm still abit new to MySQL. Spending the last 6 months I have worked
with it more on my CGI development, than good SQL query practicing. My
technical jargon is lacking. In laymens terms ( I know no other at this
point in time ) I have a row that has '1' or '0' in it. I'm trying to
