Lua - SQLite3 isn't inserting rows into its database - database

Question

I'm trying to build an expense app for Android phones, and I need a way to display the expenses. The plan (for my current step) is to allow the user to view their expenses. I want to show a calendar-like screen, and if there is at least one expense for a day, then use a different color for the button.
My problem is in inserting information to the sqlite3 table. Here is my code:
require "sqlite3"
--create path
local path = system.pathForFile("expenses.sqlite", system.DocumentsDirectory )
file = io.open( path, "r" )
if( file == nil )then
-- Doesn't Already Exist, So Copy it In From Resource Directory
pathSource = system.pathForFile( "expenses.sqlite", system.ResourceDirectory )
fileSource = io.open( pathSource, "r" )
contentsSource = fileSource:read( "*a" )
--Write Destination File in Documents Directory
pathDest = system.pathForFile( "expenses.sqlite", system.DocumentsDirectory )
fileDest = io.open( pathDest, "w" )
fileDest:write( contentsSource )
-- Done
io.close( fileSource )
io.close( fileDest )
end
db = sqlite3.open( path )
--setup the table if it doesn't exist
local tableSetup = [[CREATE TABLE IF NOT EXISTS expenses (id INTEGER PRIMARY KEY, amount, description, year, month, day);]]
db:exec(tableSetup)
local tableFill = [[INSERT INTO expenses VALUES (NULL,']] .. 15 .. [[',']] .. "Groceries" .. [[',']] .. 2013 .. [[',']] .. 4 .. [[',']] .. 8 ..[[');]]
db:exec(tableFill)
for row in db:nrows("SELECT * FROM expenses") do
print("hi")
if row.year == dateTable[i].year and row.month == dateTable[i].month and row.day == dateTable[i].day then
flag = dateTabel[i].day
end
end
I have looked everywhere to see if I've used the wrong sqlite3 commands wrong since I'm not very familiar to it, but I tried everything I found and nothing worked. The print("hi")
line doesn't execute, so that tells me that there are no rows in the table.
Also, if I say db:nrows("SELECT year, month, day FROM expenses"), sqlite3 gives me an error saying there is no year column. My overall guess is that I'm not inserting the information into the table properly, but I've tried everything I can think of. Can anyone help?

Answer 1

I figured out that there was an issue with the current version of sqlite3 and the one I have on my computer. Anyway, I changed a couple of lines and it works flawlessly. I changed the select statement and the for loop.
--sqlite statement
local check = "SELECT DISTINCT year, month, day FROM expenses WHERE year = '"..dateTable[i].year.."' AND month = '"..dateTable[i].month.."' AND day = '"..dateTable[i].day.."'"
--check if there is at least one expense for a given day
--if there isn't one, the for loop won't execute
for row in db:nrows(check) do
flag = row.day
end
Then I go on to create a button with a different color if the day number is equal to the flag variable.
This is all inside a another for loop which creates each dateTable[i].