Flutter Sqfllte date comparision

I would like to do a date comparison between a start and end date for a particular month, my dates are stored in a column in the format “01/03/2021” I trying to query this using sqflite but I am not getting the results that I want. So far I have tried

"select * from t_Expenses where date between date('" + startDate + "') and date('" + endDate + "') order by date, id desc"
"select * from t_Expenses where date between '" + startDate + "' and '" + endDate + "' order by date, id desc"
"select * from t_Expenses where date >= '" + startDate + "' and <= '" + endDate + "' order by date, id desc"

please advise