Python: fetching data from the backend and matching date field

Question

0.00/5 (No votes)

See more:

Hi Team,

I and trying to fetch the data from the backend(oracle) and filter on date column.
backend data have datecolumn which have value '01-Jan-2016', but when i fetch the data its giving me value as " datetime.datetime(2016, 1, 1, 0, 0) " .
I am finding it difficult to use where condition on date column.
Please suggest me correct code.

What I have tried:

c.execute("SELECT *FROM DN_T_DSRDTL WHERE ARECOD = '%s'" % areaCD + " and " +" DSRSTA ='%s'" % dtsType + " and " + " invnum ='%s'" % invnum +
" and " + " DSRDAT = '%s'" %startDate )

Posted 18-Apr-20 2:26am

Isteyak Ahmad

Updated 18-Apr-20 4:56am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

MadMyche · Answer 1 · 2020-04-18T04:56:00

2 very common problems are here.

The first is that your code is vulnerable to SQL Injection. You should NEVER EVER create an SQL query by piecing command strings and user data together. If you slip in a few special characters you can easily open up the entire db for all to view or delete.
As I am not fluent in Python I cannot tell you the best way to rewrite this; however this appears to be a very good sample to follow: OpenStack Docs: Parameterize Database Queries[^]

The second is DateTime. Most programming languages and databases actually store and work with DateTime objects as a number; and the only time there is a format to it is when it is converted to text for humans to read.
As previously stated, I am not fluent in Python. And you have not mentioned what type of DB you are working with. But I can tell you generally that your DB should have the appropriate data-type for your date, and when your program uses a parameterized query with the correct data-type and the database is of the same data-type; the database driver will take care of it 99.999% of the time.