Question

## COMMENT OUT below just for reference
""
cursor.execute ("""
    CREATE TABLE yellowpages
    (
        business_id     BIGINT(20) NOT NULL AUTO_INCREMENT,
        categories_name VARCHAR(255),
        business_name   VARCHAR(500) NOT NULL,
        business_address1 VARCHAR(500),
        business_city VARCHAR(255),
        business_state VARCHAR(255),
        business_zipcode VARCHAR(255),
        phone_number1 VARCHAR(255),
        website1 VARCHAR(1000),
        website2 VARCHAR(1000),
        created_date datetime,
        modified_date datetime,
        PRIMARY KEY(business_id)
    )
""")
""
## TOP COMMENT OUT (just for reference)

## code
website1g = "http://www.triman.com"
business_nameg = "Triman Sales Inc"
business_address1g = "510 E Airline Way"
business_cityg = "Gardena"
business_stateg = "CA"
business_zipcodeg = "90248"
phone_number1g = "(310) 323-5410"
phone_number2g = ""
website2g = ""

cursor.execute ("""
    INSERT INTO yellowpages(categories_name, business_name, business_address1, business_city, business_state, business_zipcode, phone_number1, website1, website2)
    VALUES ('%s','%s','%s','%s','%s','%s','%s','%s','%s')
""", (''gas-stations'', business_nameg, business_address1g, business_cityg, business_stateg, business_zipcodeg, phone_number1g, website1g, website2g))


cursor.close()
conn.close()

我一直收到此错误

  File "testdb.py", line 51
    """, (''gas-stations'', business_nameg, business_address1g, business_cityg, business_stateg, business_zipcodeg, phone_number1g, website1g, website2g))
              ^
SyntaxError: invalid syntax

任何想法为什么？

感谢您的帮助

更新＃2，我删除了“categories_name”上的双引号，但现在甚至

import MySQLdb  

conn =  MySQLdb.connect(host="localhost",port=22008,user="cholestoff",passwd="whoami",db="mydatabase")  
cursor = conn.cursor()  

## Find mysql version  
cursor.execute ("SELECT VERSION()")  
row = cursor.fetchone()  
print "server version:", row[0]  

website1g = "http://www.triman.com"  
business_nameg = "Triman Sales Inc"  
business_address1g = "510 E Airline Way"  
business_cityg = "Gardena"  
business_stateg = "CA"  
business_zipcodeg = "90248"  
phone_number1g = "(310) 323-5410"  
phone_number2g = ""  

cursor.execute ("""
    INSERT INTO yellowpages(categories_name, business_name)
    VALUES ('%s','%s')
""", ('gas-stations', business_nameg))              

cursor.close()  
conn.close()

仍然出现此错误

server version: 5.1.33-community  
Traceback (most recent call last):  
  File "testdb.py", line 23, in <module>  
    """, ('gas-stations', business_nameg))  
  File "C:\Python26\lib\site-packages\MySQLdb\cursors.py", line 173, in execute  
    self.errorhandler(self, exc, value)  
  File "C:\Python26\lib\site-packages\MySQLdb\connections.py", line 36, in   defaulterrorhandler  
    raise errorclass, errorvalue  
_mysql_exceptions.ProgrammingError: (1064, "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 'gas-stations'',''Triman Sales Inc'')' at line 2")

再次感谢您的帮助

Answer 1

我认为你的问题在这里：

''gas-stations''

这会产生语法错误。您可能想要使用一组引号：

'gas-stations'

如果要将值'gas-stations'插入包含引号的数据库中，则可以转义引号或用双引号而不是单引号括起字符串：

"'gas-stations'"

“向上箭头”指向错误位置的原因是因为您的线条很长，以至于它在您的控制台上包裹。缩短线条，或者扩大控制台窗口以查看错误的确切位置。

Answer 2

对于您的第二个问题，您需要丢失VALUES子句中的所有单引号字符...应该看起来像VALUES (%s,%s)而不是VALUES ('%s','%s')。

一般规则非常简单：对于每个参数，在SQL语句中都有一个放置标记（在mySQLdb的情况下，这是%s），并在参数元组中提供一个Python表达式。然后向后倾斜，让界面软件为您做正确的事情。这包括正确引用字符串。不要试图自己做。特别是，字符串表达式应该是您希望稍后检索的内容。

示例：加油站的business_name是“O'Reilly的Pump'n'Go”作为Python字符串常量。这将在构造的SQL中以...VALUES(...,'O''Reilly''s Pump''n''Go',...结束，而不必考虑它。

Answer 3

您不能使用加倍的单引号（即''gas-stations''） - 只使用单引号（'gas-stations'）或实际双引号（"gas-stations"）。

Answer 4

我也遇到了这样的错误，我通过在值下用％s替换'％s'来解决它。

    VALUES(%s,%s)

python MySQLdb在尝试INSERT INTO表时获得了无效的语法

4 个答案: