Mysql Python：并非所有参数都在MySQL语句中使用

Question

所以我试图将数据作为变量输入到我的表中，但我似乎不断收到错误 mysql.connector.errors.ProgrammingError: Not all parameters were used in the SQL statement, I have used the %s instead of行名称，但我似乎不断收到相同的错误。我怀疑这是我的语法，但我似乎无法弄清楚这是我第一次同时使用 python 和 MySQL

import mysql.connector


Sensor_ID = "test"

Location = "room"

Sensor_IP = "192.168.1.1"

Sensor_1 = "10"

Sensor_1_Unit = "*C"

Sensor_2 =""

Sensor_2_Unit = ""

Sensor_3 = ""

Sensor_3_Unit = ""

conn = mysql.connector.connect(user='******', password='********',    host='******', database='*****') #blanked my user n pass
mycursor = conn.cursor()
mycursor.execute('SHOW TABLES')
print(mycursor.fetchall())
print ""

mycursor.execute("SHOW VARIABLES LIKE '%version%'")
print "Version:",(mycursor.fetchall())
#works up to here

mycursor.execute("INSERT INTO iot_sensors VALUES (ID, Sensor_ID, Location, Sensor_IP, Sensor_1, Sensor_1_Unit, Sensor_2,Sensor_2_Unit, Sensor_3,   Sensor_3_Unit)",(Sensor_ID,Location,Sensor_IP,Sensor_1,Sensor_1_Unit,Sensor_2,Sensor_2_Unit,Sens or_3,Sensor_3_Unit))
conn.commit()

  #    Sensor_ID,Location,Sensor_IP,Sensor_1,Sensor_1_Unit,Sensor_2,Sensor_2_Unit,Sensor_3,Sensor_3_Unit

创建表 IoT_Sensors(

ID INT NOT NULL AUTO_INCREMENT,

Sensor_ID VARCHAR (15) NOT NULL，

位置 VARCHAR (20) NOT NULL，

Sensor_IP VARCHAR (15) 非空，

Sensor_1 VARCHAR (15) 非空，

Sensor_1_Unit VARCHAR (15) NOT NULL,

Sensor_2 VARCHAR (15)，

Sensor_2_Unit VARCHAR (15)，

传感器_3 VARCHAR (15)，

Sensor_3_Unit VARCHAR (15)，

Time_Stamp TIMESTAMP NOT NULL，

主键 (ID));

Answer 1

您需要将 %s 放入您的 SQL 语句中。

mycursor.execute("INSERT INTO iot_sensors VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s)",(Sensor_ID,Location,Sensor_IP,Sensor_1,Sensor_1_Unit,Sensor_2,Sensor_2_Unit,Sens or_3,Sensor_3_Unit))

请参阅docs 中的示例。

Answer 2

看起来您在插入语句中缺少formatting 您的实际变量。尝试使用一种已知的方法来格式化它们，%s 或 .format 方法。插入时，您也没有使用表中的时间戳、最后一列和值。如果您只是引用该表，您将有一个列不匹配。您必须明确说明要填充的列。您可以为此使用 CURRENT_TIMESTAMP，因为它对列描述说 NOT NULL。

query = ("""Insert into iot_sensors (Sensor_ID, Location, Sensor_IP, Sensor_1, Sensor_1_Unit, Sensor_2, Sensor_2_Unit, Sensor_3, Sensor_3_Unit) values
                    ('{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}');""".format(Sensor_ID,Location,Sensor_IP,Sensor_1,Sensor_1_Unit,Sensor_2,Sensor_2_Unit,Sensor_3,Sensor_3_Unit))
mycursor.execute(query)

或

query = ("""Insert into iot_sensors (Sensor_ID, Location, Sensor_IP, Sensor_1, Sensor_1_Unit, Sensor_2, Sensor_2_Unit, Sensor_3, Sensor_3_Unit) values
    (%s,%s,%s,%s,%s,%s,%s,%s,%s);""" % (Sensor_ID,Location,Sensor_IP,Sensor_1,Sensor_1_Unit,Sensor_2,Sensor_2_Unit,Sensor_3,Sensor_3_Unit))
mycursor.execute(query)