创建表 创建表 import mysql . connector   mydb = mysql . connector . connect ( host = "localhost" , user = "myusername" , passwd = "mypassword" , database = "mydataba...

检查表是否存在 检查表是否存在 import mysql . connector   mydb = mysql . connector . connect ( host = "localhost" , user = "myusername" , passwd = "mypassword" , database = "...

从已有表中删除记录 从已有表中删除记录 import mysql . connector   mydb = mysql . connector . connect ( host = "localhost" , user = "myusername" , passwd = "mypassword" , database...

防止 SQL 注入 防止 SQL 注入 import mysql . connector   mydb = mysql . connector . connect ( host = "localhost" , user = "myusername" , passwd = "mypassword" , database...

删除已有的表 删除已有的表 import mysql . connector   mydb = mysql . connector . connect ( host = "localhost" , user = "myusername" , passwd = "mypassword" , database = "my...

右联接（RIGHT JOIN） 右联接（RIGHT JOIN） import mysql . connector   mydb = mysql . connector . connect ( host = "localhost" , user = "myusername" , passwd = "mypassword" ,...