SQL seems to round up the number automatically on select statement? - sql

Question

Hi Here is my SQL code:
SELECT a."Date", a."Missed", b."Total Client Schedules", cast(100-((a."Missed"*100) / b."Total Client Schedules")AS decimal) as "Pct Completed" -
FROM -
( -
SELECT DATE(scheduled_start) as "Date",count(*) as "Missed" FROM -
events WHERE node_name IS NOT NULL AND status IN ('Missed') GROUP BY DATE(scheduled_start) -
) as a, -
( -
SELECT DATE(scheduled_start) as "Date", count(*) as -
"Total Client Schedules" FROM events WHERE node_name IS NOT NULL GROUP BY DATE(scheduled_start) -
) as b -
WHERE a."Date" = b."Date" ORDER BY "Date" desc
and Here is the output
Date Missed Total Client Schedules Pct Completed
----------- ------------ ----------------------- --------------
2013-02-20 2 805 100
2013-02-19 14 805 99
2013-02-18 29 805 97
2013-02-17 59 805 93
2013-02-16 29 806 97
2013-02-15 49 805 94
2013-02-14 33 805 96
2013-02-13 57 805 93
2013-02-12 21 805 98
2013-02-11 35 805 96
2013-02-10 34 805 96
it always seems to round to the highest number when i want it to be like 99.99% or 97.2% etc..

Answer 1

You don't specify what database you are using. However, some databases do integer arithmetic, so 1/2 is 0 not 0.5.
To fix this, just make the constants you are using numeric rather than integer:
cast(100.0-((a."Missed"*100.0) / b."Total Client Schedules")AS decimal)
It will then convert to a non-integer type for the arithmetic.