count statement

[bsder]

Hi,

If I want to select a result that based on the value of count (eg.
count(*) > 5), how can I write a sql to do that?

eg.
select count(*)>5
from Flight
where OperationType = "Departure"
group by Airline, Runway
order by Date

Thanks
D

[Felix Geerinckx]

Re: count statement

On 13/07/2005, bsder wrote:
[color=blue]
> If I want to select a result that based on the value of count (eg.
> count(*) > 5), how can I write a sql to do that?
>
> eg.
> select count(*)>5
> from Flight
> where OperationType = "Departure"
> group by Airline, Runway
> order by Date[/color]

select *
from Flight
where OperationType = "Departure"
group by Airline, Runway
order by Date
HAVING count(*)>5

--
felix

[jm1974]

Re: count statement

I don't believe it's possible in one query, but I can't guarantee.

I do it in two queries :
select <primarykey>, count(airline) as cnt_airline into temporary table
FLIGHT_GREATER5
from Flight
where OperationType = "Departure"
group by Airline, Runway
HAVING cnt_airline > 5;

select Flight.*
from Flight, FLIGHT_GREATER5
where Flight.<primary key> = FLIGHT_GREATER5 .<primarykey>;