1、sql执行操作:
import pymysql # 创建连接 conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='tkq1', charset='utf8') # 创建游标 cursor = conn.cursor() # 执行SQL,并返回收影响行数 effect_row = cursor.execute("select * from tb7") # 执行SQL,并返回受影响行数 #effect_row = cursor.execute("update tb7 set pass = '123' where nid = %s", (11,)) # 执行SQL,并返回受影响行数,执行多次 #effect_row = cursor.executemany("insert into tb7(user,pass,licnese)values(%s,%s,%s)", [("u1","u1pass","11111"),("u2","u2pass","22222")]) # 提交,不然无法保存新建或者修改的数据 conn.commit() # 关闭游标 cursor.close() # 关闭连接 conn.close()
2、获取查询数据
import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='tkq1') cursor = conn.cursor() cursor.execute("select * from tb7") # 获取剩余结果的第一行数据 row_1 = cursor.fetchone() print row_1 # 获取剩余结果前n行数据 # row_2 = cursor.fetchmany(3) # 获取剩余结果所有数据 # row_3 = cursor.fetchall() conn.commit() cursor.close() conn.close()
3、获取新创建数据自增ID
import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='tkq1') cursor = conn.cursor() effect_row = cursor.executemany("insert into tb7(user,pass,licnese)values(%s,%s,%s)", [("u3","u3pass","11113"),("u4","u4pass","22224")]) conn.commit() cursor.close() conn.close() #获取自增id new_id = cursor.lastrowid print new_id
4、移动游标
注:在fetch数据时按照顺序进行,可以使用cursor.scroll(num,mode)来移动游标位置,如: cursor.scroll(1,mode='relative') # 相对当前位置移动 cursor.scroll(2,mode='absolute') # 相对绝对位置移动
5、fetch数据类型
import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='tkq1') #游标设置为字典类型 cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) cursor.execute("select * from tb7") row_1 = cursor.fetchone() print row_1 #{u'licnese': 213, u'user': '123', u'nid': 10, u'pass': '213'} conn.commit() cursor.close() conn.close()
6、调用存储过程
a、调用无参存储过程
import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='tkq1') #游标设置为字典类型 cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) #无参数存储过程 cursor.callproc('p2') #等价于cursor.execute("call p2()") row_1 = cursor.fetchone() print row_1 conn.commit() cursor.close() conn.close()
b、调用有参存储过程
import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='', db='tkq1') cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) cursor.callproc('p1', args=(1, 22, 3, 4)) #获取执行完存储的参数,参数@开头 cursor.execute("select @p1,@_p1_1,@_p1_2,@_p1_3") #{u'@_p1_1': 22, u'@p1': None, u'@_p1_2': 103, u'@_p1_3': 24} row_1 = cursor.fetchone() print row_1 conn.commit() cursor.close()
conn.close()
使用with简化连接过程
import pymysql import contextlib #定义上下文管理器,连接后自动关闭连接 @contextlib.contextmanager def mysql(host='127.0.0.1', port=3306, user='root', passwd='', db='tkq1',charset='utf8'): conn = pymysql.connect(host=host, port=port, user=user, passwd=passwd, db=db, charset=charset) cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) try: yield cursor finally: conn.commit() cursor.close() conn.close() # 执行sql with mysql() as cursor: print(cursor) row_count = cursor.execute("select * from tb7") row_1 = cursor.fetchone() print row_count, row_1