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while inserting records in mysql, argument values are passing as 0 in python

In console.log I am getting the correct argument value, but when I try to add the argument value in the insert statement it is passing as 0. As a whole, the code works fine without errors, but for assg_id, instead of the actual value, it is inserting 0.
import pandas as pd
import sys
print ("parameters from nodejs", str(sys.argv[1]))
df = pd.read_csv("./userSetupData.csv")
df.head()
import mysql.connector as msql
from mysql.connector import Error
try:
conn = msql.connect(host='localhost', database='pythonTest', user='root', password='0000', auth_plugin='mysql_native_password')
if conn.is_connected():
cursor = conn.cursor()
cursor.execute("select database();")
record = cursor.fetchone()
assgn_id = str(sys.argv[1])
print('Checking the parameter value', assgn_id)
for i,row in df.iterrows():
#here %S means string values
sql = "INSERT INTO pythonTest.usr_stg VALUES (%s,%s,%s,%s,%s,assgn_id)"
cursor.execute(sql, tuple(row))
print("Record inserted")
# the connection is not auto committed by default, so we must commit to save our changes
conn.commit()
except Error as e:
print("Error while connecting to MySQL", e)

sql has normal string and it treats assgn_id as normal text in string, not Python's variable
You would have to use f-string and "{assgn_id}" to put value in this string
sql = f"INSERT INTO pythonTest.usr_stg VALUES (%s,%s,%s,%s,%s, {assgn_id})"
Or you should put assgn_id in tuple with parameters (and use %s in query)
sql = "INSERT INTO pythonTest.usr_stg VALUES (%s,%s,%s,%s,%s, %s)"
cursor.execute(sql, tuple(row.to_list() + [assgn_id]) )

sqlite3 view() prints with empty list?

I have testtable() function that works to create the table if necessary and list all the PDF file names in a column. However, when I execute my view() function, it prints an empty list. Am I missing something or just going about this in the wrong way?
import os, sys
import sqlite3
import csv
testdb = 'pdftestdir.db'
def testtable():
conn = sqlite3.connect(testdb)
cur = conn.cursor()
cur.execute('CREATE TABLE IF NOT EXISTS test (name TEXT)')
path = os.listdir('/root/Desktop/PDF')
conn = sqlite3.connect(testdb)
cur = conn.cursor()
cur.execute('SELECT * FROM test')
exists = cur.fetchall()
for name in path:
if name.endswith('.pdf'):
if not exists:
cur.execute('INSERT INTO test VALUES (?)', (name,))
else:
pass
conn.commit()
conn.close()
def view():
conn = sqlite3.connect(testdb)
cur = conn.cursor()
cur.execute('SELECT * FROM test')
cur.fetchall()
rows = cur.fetchall()
conn.close()
print(rows)

You unnecessarily call cur.fetchall() without storing the returning value to a variable, and the cursor has already reached the end of the rows returned with that call, so the second time you call cur.fetchall() it no longer has any more rows to return.
You can fix this by simply removing the redundant call.
Change:
cur.fetchall()
rows = cur.fetchall()
to:
rows = cur.fetchall()

Python cx_Oracle SQL with bind string variable

I have a problem with creating SQL query for Oracle database using Python.
I want to bind string variable and it does not work, could you tell me what am I doing wrong?
This is my code:
import cx_Oracle
dokList = []
def LoadDatabase():
conn = None
cursor = None
try:
conn = cx_Oracle.connect("login", "password", "localhost")
cursor = conn.cursor()
query = "SELECT * FROM DOCUMENT WHERE DOC = :param"
for doknumber in dokList:
cursor.execute(query, {'doknr':doknumber})
print(cursor.rowcount)
except cx_Oracle.DatabaseError as err:
print(err)
finally:
if cursor:
cursor.close()
if conn:
conn.close()
def CheckData():
with open('changedNamed.txt') as f:
lines = f.readlines()
for line in lines:
dokList.append(line)
CheckData()
LoadDatabase()
The output of cursor.rowcount is 0 but it should be number greater than 0.

You're using a dictionary ({'doknr' : doknumber}) for your parameter, so it's a named parameter - the :param needs to match the key name. Try this:
query = "SELECT * FROM DOCUMENT WHERE DOC = :doknr"
for doknumber in dokList:
cursor.execute(query, {'doknr':doknumber})
print(cursor.rowcount)
For future troubleshooting, to check whether your parameter is getting passed properly, you can also try changing your query to "select :param from dual".

Execute SQL for different where clause from Python

I am trying to print SQL result through python code, where I an trying to pass different predicates of the where clause from a for loop. But the code only taking the last value from the loop and giving the result.
In the below example I have two distinct id values 'aaa' and 'bbb'. There are 4 records for id value = 'aaa' and 2 records for the id value = 'bbb'.
But the below code only giving me the result for the id value ='bbb' not for id value 'aaa'
Can anyone help to identify what exactly wrong I am doing?
import pymysql
db = pymysql.connect(host="localhost", user="user1", passwd="pass1", db="db1")
cur = db.cursor()
in_lst=['aaa', 'bbb']
for i in in_lst:
Sql = "SELECT id, val, typ FROM test123 Where id='{inpt}'".format(inpt=i)
print(Sql)
cur.execute(Sql)
records = cur.fetchall()
print(records)
db.close()
The result I am getting as below
C:\Python34\python.exe C:/Users/Koushik/PycharmProjects/Test20161204/20170405.py
SELECT id, val, typ FROM test123 Where id='bbb'
(('bbb', 5, '1a'), ('bbb', 17, '1d'))
Process finished with exit code 0

import pymysql
db = pymysql.connect(host="localhost", user="root", passwd="1234", db="sakila")
cur = db.cursor()
in_lst=['1', '2']
for i in in_lst:
Sql = "SELECT * FROM actor Where actor_id='{inpt}'".format(inpt=i)
print(Sql)
cur.execute(Sql)
records = cur.fetchall()
print(records)
db.close()
Indentation is your problem, please update the code according to your needs...

Within your for loop, you're formatting the sql statement to replace "{inpt}" with "aaa". However, before you do anything with that value, you're immediately overwriting it with the "bbb" version.
You would need to either:
Store the results somehow before the next iteration of the loop, then process them outside of the loop.
Process the results within the loop.
Something like the following will give you a list containing both results from the fetchall() calls:
import pymysql
db = pymysql.connect(host="localhost", user="user1", passwd="pass1", db="db1")
cur = db.cursor()
in_lst=['aaa', 'bbb']
records = list()
for i in in_lst:
Sql = "SELECT id, val, typ FROM test123 Where id='{inpt}'".format(inpt=i)
print(Sql)
cur.execute(Sql)
records.append(cur.fetchall())
print(records)
db.close()

Trying to log date and time into sqlite3

My goal is to take two variables, xdate and xtime and store them into an sqlite database in two separate columns using a python scripts. My code is
from datetime import datetime
import sqlite3 as mydb
import sys
con = mydb.connect('testTime.db')
def logTime():
i=datetime.now()
xdate = i.strftime('%Y-%m-%d')
xtime = i.strftime('%H-%M-%S')
return xdate, xtime
z=logTime()
this is where I get hung up I tried
try:
with con:
cur = con.cursor
cur.execute('INSERT INTO DT(Date, Time) Values (?,?)' (z[0],z[1]))
data = cur.fetchone()
print (data)
con.commit()
except:
with con:
cur=con.cursor()
cur.execute("CREATE TABLE DT(Date, Time)')
cur.commit()
I keep getting none when I try to fetch the data.
Any tips or recommended readings??

You are executing a insert query, it's result is not having any thing to fetch. You should run a select query and then fetch the data.
fetchone()
Fetches the next row of a query result set, returning a single sequence, or None when no more data is available.
An example -
>>> cur.execute('INSERT INTO DT(Date, Time) Values (?,?)', (z[0],z[1]))
<sqlite3.Cursor object at 0x0353DF60>
>>> print cur.fetchone()
None
>>> cur.execute('SELECT Date, Time from DT')
<sqlite3.Cursor object at 0x0353DF60>
>>> print cur.fetchone()
(u'2016-02-25', u'12-46-16')