I have two tables in mysql (shop_details,booking)
shop_details
id shop_id open_time close_time
1 1 09:00Am 09:00Pm
2 5 10:00Am 09:00Pm
booking
id shop_id start_time end_time
1 1 10:30am 11:10Am
1 5 02:00pm 02:45pm
Now I want if I want to know about shop_id (1) then I want to get booked time (after shop open time) and avaliable time (till shop close) with every half hour, for example I want following result
shop_id start_time end_time status
1 09:00am 09:30am avaliable
1 09:30am 10:00am avaliable
1 10:00am 10:30am avaliable
1 10:30am 11:10am booked
1 11:10am 11:40am avaliable
...
1 08:30am 09:00pm booked
You need a list of times -- then you can get the information using a join
or correlated subquery:
select t.tme,
(case when exists (select 1
from booking b
where b.start_time <= t.tme and
b.end_time > t.tme
)
then 'booked' else 'available'
end) as status
from (select cast('00:00' as time) as tme union all
select cast('00:30' as time) as t union all
select cast('01:00' as time) as t union all
. . .
select cast('23:50' as time) as t
) t join
(select sd.*
from shop_details sd
where sd.shop_id = 1
) sd1
on t.tme >= sd1.open_time and
t.tme <= sd1.close_time;
first, use while function to create a loop that will repeat the code until reaching close time, inside while function, u can use IF statement to make Availability status base on dates
goold luck
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