[FIXED] Python sqlite3.OperationalError: no such table:

Issue

I am trying to store data about pupils at a school. I've done a few tables before, such as one for passwords and Teachers which I will later bring together in one program.

I have pretty much copied the create table function from one of these and changed the values to for the Pupil's information. It works fine on the other programs but I keep getting:

sqlite3.OperationalError: no such table: PupilPremiumTable

when I try to add a pupil to the table, it occurs on the line:

cursor.execute("select MAX(RecordID) from PupilPremiumTable")

I look in the folder and there is a file called PupilPremiumTable.db and the table has already been created before, so I don't know why it isn't working.

Here is some of my code, if you need more feel free to tell me so, as I said it worked before so I have no clue why it isn't working or even what isn't working:

with sqlite3.connect("PupilPremiumTable.db") as db:
    cursor = db.cursor()
    cursor.execute("select MAX(RecordID) from PupilPremiumTable")
    Value = cursor.fetchone()
    Value = str('.'.join(str(x) for x in Value))
    if Value == "None":
        Value = int(0)
    else:
        Value = int('.'.join(str(x) for x in Value))
    if Value == 'None,':
        Value = 0
    TeacherID = Value + 1
    print("This RecordID is: ",RecordID)

Solution

You are assuming that the current working directory is the same as the directory your script lives in. It is not an assumption you can make. Your script is opening a new database in a different directory, one that is empty.

Use an absolute path for your database file. You can base it on the absolute path of your script:

import os.path

BASE_DIR = os.path.dirname(os.path.abspath(__file__))
db_path = os.path.join(BASE_DIR, "PupilPremiumTable.db")
with sqlite3.connect(db_path) as db:

You can verify what the current working directory is with os.getcwd() if you want to figure out where instead you are opening the new database file; you probably want to clean up the extra file you created there.

Answered By - Martijn Pieters