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update the last entered value from a selection of values in a database with python , mysql

Okay so i have a table which has student id and the student id is used as identifier to edit the column but what if the same student lends a book twice then all the student value will b edited which i don't want....i want the last entered data of student id to b edited and using a Sl.No is not a solution here because its practically complicated.I am using python connector. Please help :) Thanks in advance
code i use right now :
con = mysql.connect(host='localhost', user='root',
password='monkey123', database='BOOK')
c = con.cursor()
c.execute(
f"UPDATE library set `status`='Returned',`date returned`='{str(cal.selection_get())}' WHERE `STUDENT ID`='{e_sch.get()}';")
c.execute('commit')
con.close()
messagebox.showinfo(
'Success', 'Book has been returned successfully')

If I followed you correctly, you want to update just one record that matches the where condition. For this to be done in a reliable manner, you need a column to define the ordering of the records. It could be a date, an incrementing id, or else. I assume that such column exists in your table and is called ordering_column.
A simple option is to use ORDER BY and LIMIT in the UPDATE statement, like so:
sql = """
UPDATE library
SET status = 'Returned', date returned = %s
WHERE student_id = %s
ORDER BY ordering_column DESC
LIMIT 1
"""
c = con.cursor()
c.execute(sql, (str(cal.selection_get()), e_sch.get(), )
Note that I modified your code so input values are given as parameters rather than concatenated into the query string. This is an important change, that makes your code safer and more efficient.

Populating Table with Values from other table if ID not in DWH table

I am performing an ETL task where I am querying tables in a Data Warehouse to see if it contains IDs in a DataFrame (df) which was created by joining tables from the operational database.
The DataFrame only has ID columns from each joined table in the operational database. I have created a variable for each of these columns, e.g. 'billing_profiles_id' as below:
billing_profiles_dim_id = df['billing_profiles_dim_id']
I am attempting to iterated row by row to see if the ID here is in the 'billing_profiles_dim' table of the Data Warehouse. Where the ID is not present, I want to populate the DWH tables row by row using the matching ID rows in the ODB:
for key in billing_profiles_dim_id:
sql = "SELECT * FROM billing_profiles_dim WHERE id = '"+str(key)+"'"
dwh_cursor.execute(sql)
result = dwh_cursor.fetchone()
if result == None:
sqlQuery = "SELECT * from billing_profile where id = '"+str(key)+"'"
sqlInsert = "INSERT INTO billing_profile_dim VALUES ('"+str(key)+"','"+billing_profile.name"')
op_cursor = op_connector.execute(sqlInsert)
billing_profile = op_cursor.fetchone()
So far at least, I am receiving the following error:
SyntaxError: EOL while scanning string literal
This error message points at the close of barcket at
sqlInsert = "INSERT INTO billing_profile_dim VALUES ('"+str(key)+"','"+billing_profile.name"')
Which I am currently unable to solve. I'm also aware that this code may run into another problem or two. Could someone please see how I can solve the current issue and please ensure that I head down the correct path?

You are missing a double tick and a +
sqlInsert = "INSERT INTO billing_profile_dim VALUES ('"+str(key)+"','"+billing_profile.name+"')"
But you should really switch to prepared statements like
sql = "SELECT * FROM billing_profiles_dim WHERE id = '%s'"
dwh_cursor.execute(sql,(str(key),))
...
sqlInsert = ('INSERT INTO billing_profile_dim VALUES '
'(%s, %s )')
dwh_cursor.execute(sqlInsert , (str(key), billing_profile.name))

How to make automatically items id numeration?

I'm trying to insert some data into SQL database, and the problem is that I'm really green on this. So the MAIN problem is that How can I sort all the items in table? I have 3 main things: ID, CARNUM, TIME. But in this 'Insertion' I have to type the id manually. How can I make that the system would create a numeric id numeration automatically?
Here's the insertion code:
postgres_insert_query = """ INSERT INTO Vartotojai (ID, CARNUM, TIME) VALUES (%s,%s,%s)"""
record_to_insert = (id, car_numb, Reg_Tikslus_Laikas)
cursor.execute(postgres_insert_query, record_to_insert)
connection.commit()
count = cursor.rowcount
print (count, "Record inserted successfully into mobile table")
pgadmin sort
pgadmin table

You could change the datatype of ID to serial, which is an auto incrementing integer. Meaning that you don't have to manually enter an ID when inserting into the database.
Read more about datatype serial: source

Update SQLITE DB with multiple python lists

I'm attempting to update my sqlite db with 2 python lists. I have a sqlite db with three fields. Name, number, date. I also have three python lists with similar names. I'm trying to figure out a way to update my sqlite db with data from these 2 lists. I can get the db created, and even get a single column filled, but I cant seem to update it correctly or at all. Is there a way to INSERT both lists at once? Rather than INSERT a single column and then UPDATE the db with the other?
Here is what I have so far:
name_list = []
number_list = []
date = now.date()
strDate = date.strftime("%B %Y")
tableName = strDate
sqlTable = 'CREATE TABLE IF NOT EXISTS ' + tableName + '(name text, number integer, date text)'
c.execute(sqlTable)
conn.commit()
for i in name_list:
c.execute('INSERT INTO January2018(names) VALUES (?)', [i])
conn.commit()
I can't seem to get past this point. I still need to add another list of data (number_list) and attach the date to each row.
Here's what I have on that:
for i in number_list:
c.execute('UPDATE myTable SET number = ? WHERE name', [i])
conn.commit()
Any help would be much appreciated. And if you need more information, please let me know.

You can use executemany with zip:
c.executemany('INSERT INTO January2018 (name, number) VALUES (?, ?)', zip(name_list, number_list))
conn.commit()

How to add multiple Columns into Sqlite3 from a for loop in Python

Admittedly I a still very new to both Python and Sqlite3, and I am attempting to add the contents of two lists into a database so that one list is in the first column and the second list shows up in the second column. To this point, I have been unsuccessful. I am defenitely making a fundamental error, and the error message that I get is this: "sqlite3.InterfaceError: Error binding parameter 0 - probably unsupported type."
my code is this:
import sqlite3
names = ['Tom', 'Dick', 'Harry']
ids = ['A452', 'B698', 'Kd9f']
conn = sqlite3.connect('testforinput.db')
c = conn.cursor()
c.execute("CREATE TABLE thetable(name TEXT, id TEXT)")
index = 0
for link in names:
idofperson = ids[index]
c.execute("INSERT INTO thetable(name, id)VALUES(?, ?)", ( [link], idofperson ))
index+=1
conn.commit()
conn.close()
The error occurs because of the for loop specifically the "idofperson" variable
The desired outcome is that I would like to have two columns created in sql one being name and the other being id.
Any help would be greatly appreciated.

I think you just change
index =0
for link in names:
idofperson = ids[index]
c.execute("INSERT INTO thetable(name, id)VALUES(?, ?)", ( [link], idofperson ))
to this (use enumrate and change [list] to list, because you pass a list into a column need TEXT type):
for index, link in enumrable(names):
idofperson = ids[index]
c.execute("INSERT INTO thetable(name, id)VALUES(?, ?)", ( link, idofperson ))

your variable index is not increasing.try using the enumerate on for loop. or just add index += 1 after execute

the error is occurring because of the unsupported data type you are trying to push in, you can't store list as it is, you need to change to another supported data types, i like this solution ....it worked for me https://stackoverflow.com/a/18622264/6180263

for your problem, try this:
import sqlite3
names = ['Tom', 'Dick', 'Harry']
ids = ['A452', 'B698', 'Kd9f']
data = zip(names, ids)
conn = sqlite3.connect('testforinput.db')
c = conn.cursor()
c.execute("CREATE TABLE thetable(name TEXT, id TEXT)")
for d in data:
sql = "INSERT INTO thetable (name, id) VALUES ('%s', '%s'); " % d
c.execute(sql)
conn.commit()
conn.close()
I suggest change data to a list of dict, like this [{'name':'Tom', 'id': 'A452'}, {'name':'dick', 'id':'B698'}..]
and you can generate insert sql by data, this make the insert more flexible.