python mysql基本操作

Posted 2020-07-27 3one

#链接mysql
#插入数据
import  MySQLdb

conn = MySQLdb.connect(host = \'127.0.0.1\',user = \'root\',passwd = \'\',db = \'mytest\')
cur = conn.cursor()
reConn =  cur.execute("insert into  userinfo(id,name) value(3,\'tony\')")
conn.commit()
cur.close()
conn.close()

print reConn

#查询数据
import  MySQLdb

conn = MySQLdb.connect(host = \'127.0.0.1\',user = \'root\',passwd = \'\',db = \'mytest\')
cur = conn.cursor(cursorclass=MySQLdb.cursors.DictCursor)   #以字典形式获取数据
cur = conn.cursor()                                         #以元组形式获取数据
#reConn =  cur.execute("select * from userinfo")
sql = "select name from userinfo where id = %s"
#sql = "select id from userinfo where id = %s"
params = 1
#params = \'dendi\'
#reConn = cur.execute(sql,params)
reConn = cur.execute("select * from userinfo")
#fetchall把查找到的数据一下拿出来
#fetchone逐个取数据
# data = cur.fetchall()
data = cur.fetchone()
print data
data = cur.fetchone()
print data
cur.close()
conn.close()
# print data
print reConn

#更新数据
import  MySQLdb

conn = MySQLdb.connect(host = \'127.0.0.1\',user = \'root\',passwd = \'\',db = \'mytest\')
cur = conn.cursor()
sql = "update userinfo set name = \'aaa\' where id = \'%s\'"
params = 1
reConn =  cur.execute(sql,params)
conn.commit()
#conn.rollback()
cur.close()
conn.close()

print reConn

#删除数据
import  MySQLdb

conn = MySQLdb.connect(host = \'127.0.0.1\',user = \'root\',passwd = \'\',db = \'mytest\')
cur = conn.cursor()
sql = "delete from userinfo  where id = \'%s\'"
params = 1
reConn =  cur.execute(sql,params)
conn.commit()
#conn.rollback()
cur.close()
conn.close()

print reConn



参考博客：http://www.cnblogs.com/wupeiqi/articles/4198124.html