Xcode, iphone, Sqlite, need a sign function for group by? -

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i need sql sign function group query group positive , negative amounts.

unfortunately sqlite doesn't include one.

can suggest workaround ? or how ad 1 work libsqlite3.dylib framework used in xcode ?

my query quite complicated

select fcid, sum(price), (select sum(price) tmp b ((b.due < a.due)  or ((b.due = a.due) , (b.pid <= a.pid)))) accumulated_price tmp  due >= '2011-01-25' , due < '2011-02-24' , price <> 0 group fcid  order due, pid;

what i'm trying do, group on sign(price) 2 result , negative value , positive value. these represent total expenses , total income.

would have added these tags (but i'm not allowed create new ones libsqlite3.dylib libsqlite3)

don't know if it's best choice, can try:

select your_val > 0, sum(aggregated_value)   your_table  group your_val > 0;

this way, should have 0 0 or negative values , 1 positive values.

update: if fcid field need sign for, can try:

select fcid > 0, sum(price),         (          select sum(price)             tmp b           ((b.due < a.due) or ((b.due = a.due) , (b.pid <= a.pid)))        ) accumulated_price    tmp   due >= '2011-01-25'     , due < '2011-02-24'     , price <> 0   group fcid > 0;

note order by clause useless since grouping results anyway.


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