Question

I have a table student with the following columns:

no - integer
name - string 
startdate - date 
enddate - date. 

Date format is MM/DD/YYYY.

I will give a date as input. Now I need a query the inputdate which found in between the start and end date.

For an example I will give 04/14/2012, then the query should return the 1st record as in the figure.

(because input date (04/14/2012) is found in between the 04/10/2012 to 04/20/2012)

Please help me.

Answer 1

The issue you are having is caused by your assumption that sqlite has a date/datetime type when in fact it doesn’t.

I suggest you read the following http://www.sqlite.org/datatype3.html to have a better understanding of sqlite types.

The dates in the MM/DD/YYYY format are handled as TEXT by sqlite, and so those dates are compared as strings. For example, 02/01/2012 is considered bigger than 01/02/2012by sqlite if compared directly.

You will need to transform those dates to a format that can be string-compared. Here is an example:

sqlite> create table foo (d TEXT);
sqlite> insert into foo values ('02/01/2012');
sqlite> select substr(d, 7, 4) || substr(d, 1, 2) || substr(d, 4, 2) from foo;
20120201