尝试使用 mysql 输入时不断出错

Question

I keep getting this error when i run the function:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%s)

I am trying to input values taken from another dbs. Any help would be greatly appreciated....

def filmByID(results):
    

   sql = "select * from film where filmid in (%s)"
    
    with db:
        cursor = db.cursor()
        cursor.execute(sql, (results))
        films = cursor.fetchall()
        for film in films:
            print(film["FilmName"], film["FilmSynopsis"])

Answer 1

Your question appears to boil down to "how do I repeat the %s the right number of times, to match my results parameter?"

sql_list = ','.join(['%s'] * len(results))

sql = f"select * from film where filmid in ({sql_list})"

This way, if your results parameter is, for example, [1, 2, 3] then you'll end up with...

"select * from film where filmid in (%s,%s,%s)"

If the results parameter is a list, rather than a tuple, then you may also need to convert it to a tuple...

cursor.execute(sql, tuple(results))