pymysql.err.OperationalError: (1241, 'Operand should contain 1 column(s)'). I can't determine a mistake

Question

with connection:  
with connection.cursor() as cursor:
    window = Tk()
    window.title('Data change')
    window.geometry('500x300')
    title1 = input('Name of film: ')
    country1 = input('Country: ')
    year1 = int(input('Year: '))
    duration1 = int(input('Duration: '))
    clicked2 = input('Genre: ')
    clicked3 = int(input('Director ID: '))

    sql = """insert into Film(director_id, title, genre, year, country, duration_in_min) values((select * from Director where Id = %s),%s, %s, %s, %s, %s);"""
    var = (title1, clicked2, year1, country1, duration1, clicked3)
    cursor.execute(sql, var)
    connection.commit()

我无法确定这段代码中的错误到底是什么。

Answer 1

您在值子句中有以下子查询：

(select * from Director where Id = %s)

此子查询可能 returns 不止一列，这会触发错误消息。您应该 select 只有 1 列，或者直接使用 director id 而无需子查询。

您的参数顺序与插入字段列表中的字段顺序不匹配。例如，插入中的第一个字段是 director_id，但您在参数数组的第一个位置传递 title1 参数。

pymysql.err.OperationalError: (1241, 'Operand should contain 1 column(s)'). I can't determine a mistake

pymysql.err.OperationalError: (1241, 'Operand should contain 1 column(s)'). I can't determine a mistake

python

mysql

pymysql