sql server ce - Help me with this SQL Query -


i've got sql server ce 3.5 table (transactions) following schema:

  • id
  • transaction_date
  • category
  • description
  • amount

query:

  select transaction_date, sum(amount)      transactions  group transaction_date;

i'm trying sum(amount) , group transaction_date can total amount each day want values days there no transactions record day no transactions have $0.00 amount.

thanks help!

you need calendar table select on dates. alternatively, if have numbers table, turn calendar table. basically, it's table every date in it. it's easy enough build , generate data , comes in handy these situations. use:

select     c.calendar_date,     sum(t.amount)     calendar c left outer join transactions t on     t.transaction_date = c.calendar_date group     c.calendar_date order     c.calendar_date

a few things keep in mind:

if you're sending front-end or reporting engine should send dates have (your original query) , have front end fill in $0.00 days if that's possible.

also, i've assumed here date exact date value no time component (hence "=" in join). calendar table include "start_time" , "end_time" can use between working dates include time portion. saves having strip off time portions , potentially ruining index usage. calculate start , end points of day when use it, since it's prefilled work table it's easier imo include start_time , end_time.


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