1、update delete insert 这种语句都需要commit或者直接在连接数据库的时候加上autocommit=True
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import pymysql
conn = pymysql.connect(
host = "",
user = "jxz" ,
password = "",
db = "jxz" ,
port = 3306 ,
charset = "utf8" ,
autocommit = True
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)#连接数据库
2、数据库内容比较多的时候
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for line in cursor: #表数据比较多的时候就用它
print (line)
#还有其他的间接的方式
# result = cursor.fetchmany(5) #获取n条
#cursor.execute("select * from students limit 5;")
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3、想要获取到字典型的数据,在写游标的时候加上:cursor = conn.cursor(pymysql.cursors.DictCursor) #建立游标
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cursor = conn.cursor(pymysql.cursors.DictCursor) #建立游标
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4、整体的代码:
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import pymysql
conn = pymysql.connect(host = '',
user = 'jxz' ,
password = '',
db = 'jxz' ,
port = 3306 ,
autocommit = True ,
charset = 'utf8' ) #链接数据库
cursor = conn.cursor() #游标
#查看当前所有的表
#cursor.execute('create table lmmlmm(num int,str varchar (20));')
cursor.execute( 'insert into lmmlmm (num,str)values("1","limiaomiao");' )
conn.commit()
result = cursor.fetchall()
cursor.close()
conn.close()
print (result)
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5、可以将连接数据库的参数写成集合的形式,并且用**转换成key,value的格式,方便调用
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import pymysql
mysql_info = pymysql.connect(
host = "",
user = "jxz" ,
password = "",
db = "jxz" ,
port = 3306 ,
charset = "utf8" ,
autocommit = True
) #连接数据库
##**后面只能是字典,且能够转换成key,value
def execute_sql(sql,more = False ,db_info = None ):
# select *from user where id=1;
if db_info:
conn = pymysql.connect( * * db_info)
else :
conn = pymysql.connect( * * mysql_info)
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原文链接:https://blog.csdn.net/weixin_39349045/article/details/113918958