I Have a problem when insert data python sqlite-CodePudding

I am writing to you because I cannot solve this:

I want to insert into a database with 2 fields: ID AND DATE.

and in python it throws me an error: Incorrect number of bindings supplied. The current statement uses 1.

thankss a lottt

My code:

def run_query(self, query, parameters = ()):
     with sqlite3.connect(self.db_name) as conn:
        cursor = conn.cursor()
        result = cursor.execute(query, parameters)
        conn.commit()
     return result

def add_fecha(self):

        query = 'INSERT INTO base VALUES(NULL, ?)'
        parameters = "19-2-2022"

        self.run_query(query, parameters)
     
        self.get_fechas()

CodePudding user response：

The substitution parameters value must be a tuple (or some kind of iterable). You're giving it a string, which IS an iterable, but it's going to try to use it one character at a time.

Simple fix:

        self.run_query(query, (parameters,))

CodePudding user response：

The parameters in execute() are used as iterables. When you pass your date string directly, its is also taken as iterable, therefore passing 9 parameters rather than a single date string.

You need to put your string in a tuple or a list to pass it all at once.

See the following example:

import sqlite3

with sqlite3.connect(":memory:") as conn:
    conn.execute("CREATE TABLE t (id INT, date TEXT);")
    conn.execute("INSERT INTO t VALUES(1, ?)", ["2022-06-20"])
    print(conn.execute("SELECT * FROM t").fetchall())