mysql 内置功能 存储过程 创建无参存储过程

delimiter // # 设置mysql结束符合为//
create procedure p1() # 创建程序固定procedure 和p1是存储过程名字
BEGIN
    select * from db2.teacher;  # sql语句
end //
delimiter ;

mysql> show create procedure p1\G;
*************************** 1. row ***************************
           Procedure: p1
            sql_mode: STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION
    Create Procedure: CREATE DEFINER=`root`@`localhost` PROCEDURE `p1`()
BEGIN
    select * from db2.teacher;  
end
character_set_client: utf8
collation_connection: utf8_general_ci
  Database Collation: utf8_general_ci
1 row in set (0.00 sec)

ERROR: 
No query specified

mysql> call p1();
+-----+-----------------+
| tid | tname           |
+-----+-----------------+
|   1 | 张磊老师        |
|   2 | 李平老师        |
|   3 | 刘海燕老师      |
|   4 | 朱云海老师      |
+-----+-----------------+
5 rows in set (0.18 sec)

Query OK, 0 rows affected (0.18 sec)

cursor.callproc('p1') 
print(cursor.fetchall())

import pymysql



mysql_host = '192.168.0.108'
port = 3306
mysql_user = 'root'
mysql_pwd = '123'
encoding = 'utf8'

# 建立 连接mysql服务端

conn = pymysql.connect(
    host=mysql_host,  # mysql服务端ip
    port=port,  # mysql端口
    user=mysql_user,  # mysql 账号
    password=mysql_pwd,  # mysql服务端密码
    db='db2',  # 操作的库
    charset=encoding  # 读取字符串编码

)

# 拿到游标对象
cur = conn.cursor(pymysql.cursors.DictCursor)

'''
游标是给mysql提交命令的接口
mysql> 
把sql语句传递到这里
'''


# 执行sql语句
cur.callproc('p1')
# 打印查询结果
print(cur.fetchall())



# 执行完sql语句要关闭游标和mysql连接
cur.close()
conn.close()

'''
[{'tid': 1, 'tname': '张磊老师'}, 
{'tid': 2, 'tname': '李平老师'}, 
{'tid': 3, 'tname': '刘海燕老师'}, 
{'tid': 4, 'tname': '朱云海老师'}]
'''