Not all parameters were used in the SQL statement (Python, MySQL)

I get an error on the following Python code:

import mysql.connector
cnx = mysql.connector.connect(user='root', password='',
                          host='127.0.0.1',
                          database='DB')
cursor = cnx.cursor()

Name = "James"
Department = "Finance"
StartYear = 2001
CurrentPos = 2001
Link = ""

add_user = ("INSERT INTO DB.tbluser "
       "(username, department, startyear, currentpos, link) "
       "VALUES (%s, %s, %d, %d, %s)")
data_user = (Name, Department, StartYear, CurrentPos, Link)
cursor.execute(add_user, data_user)
cnx.commit()
cursor.close()
cnx.close()

The error message is

mysql.connector.errors.ProgrammingError: Not all parameters were used in the SQL statement

Do you understand why?

The parameter marker is %s not %d.

add_user = """INSERT INTO DB.tbluser 
              (username, department, startyear, currentpos, link) 
              VALUES (%s, %s, %s, %s, %s)"""

Note that the parameter markers used by mysql.connector may look the same as the %s used in Python string formatting but the relationship is only coincidental. Some database adapters like oursql and sqlite3 use ? as the parameter marker instead of %s.

Ok here is my solution:

the %d's need to be %s's

the ''' works for multiple lines so does a +" at the start of a line and a "\ at the end but that is not this issue here

I find sometimes the cursor.execute(query, values) or in your case the cursor.execute(add_user, data_user) buggy sometimes.. so I attach the values directly to the query.

You do this by first moving your data_user above the add_user. Then you add %values at the end of the query string (in your case %data_user). This will allow you to preform a nice little print(add_user) before the cursor.exec(add_user) command to look for other bugs.

        import mysql.connector

        cnx = mysql.connector.connect(
              user='root', 
              password='',
              host='127.0.0.1',
              database='DB')

        cursor = cnx.cursor()

        Name = "James"
        Department = "Finance"
        StartYear = 2001
        CurrentPos = 2001
        Link = ""

        data_user = (Name, Department, StartYear, CurrentPos, Link)

        add_user = '''(INSERT INTO DB.tbluser 
        (username, department, startyear, currentpos, link) 
        VALUES (%s, %s, %s, %s, %s))'''%data_user


        cursor.execute(add_user)
        cnx.commit()
        cursor.close()
        cnx.close()

add_user = '''("INSERT INTO DB.tbluser " "(username, department, startyear, currentpos, link) " "VALUES (%s, %s, %s, %s, %s)")'''

=> you are using multi line statement so use triple single quotation marks here and use %s to represent passing value as string then that will works because %d is not supported by mysql to pass value

import mysql.connector

def login(self,name,password):
    db = mysql.connector.connect(host="localhost",user="root",passwd="Cyber@123",database="mydata")
    if(db):
        print("connection successfull")
    else:
        print("faild")
    query = db.cursor()
    syntext = """insert into login(use_name,psd) values(%s,%s)"""
    value = (name,password)
    query.execute(syntext,value)
    db.commit()

use single quotations

sql = 'insert into Student (id, fname, lname, school) values(%s, %s, %s , %s)'
values = (4, "Gaddafi", "Adamu", "Informatic")

a.execute(sql, values)

mydb.commit()
print(a.rowcount, "record inserted.")