Question

这是我的计划。它告诉我语法错误的确切位置，但我完全不知道问题是什么：

K__ = sf^2+sn^2;

这是我收到的语法错误消息。我在代码中放了箭头，突出显示它指出的位置：

import sqlite3

def create_table(dbName, table_name, sql):
    with sqlite3.connect("ATM.db") as db:
        cursor = db.cursor()
        cursor.execute("select name from sqlite_master where name=?",(table_name,))
        result = cursor.fetchall()
        keep_table = True
        if len(result) == 1:
            response = input("The table{0} already exists, do you wish to recreate? (y/n) \n".format(table_name))
            if response.lower() == "y":
                keep_table = False
                print("the {0} table will be recreated".format(table_name))
                cursor.execute("drop table if exists {0}".format(table_name))
                db.commit()
                insert_data()
            else:
                print("The existing table was kept")
                insert_data()
        else:
            keep_table = False
        if not keep_table:
>>>>>>      cursor.execute(sql) #Problem is supposedly here?
            db.commit()
            insert_data()

def insert_data():
    with sqlite3.connect("ATM.db") as db:
        cursor = db.cursor()
        sql = """insert into ATM(Title, First Name, Surname, Balance) values (Mr., Jeremy, Clarkson, 172.16),
                                                                             (Miss, Suzanne, Perry, 15.62)"""
        cursor.execute(sql, values)
        db.commit()


dbName = "ATM.db"
sql = """ create table ATM
          (CustomerID integer,
          Title text
          First Name text,
          Surname text,
          Balance real,
          CustomerID(CustomerID))"""
create_table(dbName, "ATM", sql)

Answer 1

错误在于您的SQL代码，而不是Python。

一些事情：

您需要以分号结束所有sqlite3命令，否则它只是作为一个命令继续阅读。这导致混淆错误的位置。
添加分号后，我们发现问题实际上在您的CREATE TABLE命令中。这条线毫无意义："CustomerID(CustomerID))"。您打算设置PRIMARY KEY吗？
```
create table ATM (
  CustomerID integer,
  Title text
  First Name text,
  Surname text,
  Balance real,
  PRIMARY KEY(CustomerID)
);
```

顺便说一下，你还有另外一个问题。这是您的查询：

insert into ATM(Title, First Name, Surname, Balance) values (Mr., Jeremy, Clarkson, 172.16),
                                                                         (Miss, Suzanne, Perry, 15.62)

问题是你需要用引号括起你的字符串，而不是将它们视为裸字，并希望它们能被正确解释：

    insert into ATM(Title, First Name, Surname, Balance) values ("Mr.", "Jeremy", "Clarkson", 172.16),
                                                                         ("Miss", "Suzanne", "Perry", 15.62);

否则，这是一个无效的查询，因为这些单词会使其格式不正确。

语法错误我无法弄清楚？ python3

1 个答案: