PYTHON连接SQLSERVER实现增删改查等基本操作

练习代码

import pymssql 
import config
server = server1
user = user1
password = password1
conn = pymssql.connect(server, user, password, database1)  #获取连接
cursor = conn.cursor() # 获取光标


####创建表
cursor.execute("""
IF OBJECT_ID('persons', 'U') IS NOT NULL
    DROP TABLE persons
CREATE TABLE persons (
    id INT NOT NULL,
    name VARCHAR(100),
    salesrep VARCHAR(100),
    PRIMARY KEY(id)
)
""")


####批量插入数据
cursor.executemany(
    "INSERT INTO persons VALUES (%d, %s, %s)",
    [(1, 'John Smith', 'John Doe'),
     (2, 'Jane Doe', 'Joe Dog'),
     (3, 'Mike T.', 'Sarah H.')])
conn.commit()


####删除数据
cursor.execute(
    "delete from persons where id=2"
    )
conn.commit()


# 查询数据并遍历，结果默认存放到元组之中，要存到字典，需修改cursor = conn.cursor(as_dict=True)
cursor.execute('SELECT * FROM persons WHERE id={0}'.format(3))
row = cursor.fetchone()
while row:
    print(row)
    row = cursor.fetchone()


####更改数据
cursor.execute(
    "update persons set name ='haha' where id=1"
    )
conn.commit()


####创建存储过程
cursor.execute("""
        CREATE PROCEDURE FindPerson
            @name VARCHAR(100)
        AS BEGIN
            SELECT * FROM persons WHERE name = @name
        END
        """)


#####调用存储过程
cursor.callproc('FindPerson', ('haha',))
for row in cursor:
    print(row)


####执行含聚合函数的语句
cursor.execute('SELECT COUNT(*) FROM persons')
for row in cursor:
    print(row[0])


conn.close()#手动关闭连接


#####用with实现自动关闭conn
with pymssql.connect("", "", "", "") as conn:
    with conn.cursor(as_dict=True) as cursor:   # 数据存放到字典中
        cursor.execute('SELECT * FROM persons WHERE salesrep=%s', 'John Doe')
        for row in cursor:
            print(row)