Python连接Mssql基础教程之Python库pymssql

import pymssql

# server  数据库服务器名称或IP
# user   用户名
# password 密码
# database 数据库名称
conn = pymssql.connect(server, user, password, database)

cursor = conn.cursor()

# 新建、插入操作
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)
)
""")
cursor.executemany(
  "INSERT INTO persons VALUES (%d, %s, %s)",
  [(1, 'John Smith', 'John Doe'),
   (2, 'Jane Doe', 'Joe Dog'),
   (3, 'Mike T.', 'Sarah H.')])
# 如果没有指定autocommit属性为True的话就需要调用commit()方法
conn.commit()

# 查询操作
cursor.execute('SELECT * FROM persons WHERE salesrep=%s', 'John Doe')
row = cursor.fetchone()
while row:
  print("ID=%d, Name=%s" % (row[0], row[1]))
  row = cursor.fetchone()

# 也可以使用for循环来迭代查询结果
# for row in cursor:
#   print("ID=%d, Name=%s" % (row[0], row[1]))

# 关闭连接
conn.close()

c1 = conn.cursor()
c1.execute('SELECT * FROM persons')

c2 = conn.cursor()
c2.execute('SELECT * FROM persons WHERE salesrep=%s', 'John Doe')

print( "all persons" )
print( c1.fetchall() ) # 显示出的是c2游标查询出来的结果

print( "John Doe" )
print( c2.fetchall() ) # 不会有任何结果

c1.execute('SELECT ...')
c1_list = c1.fetchall()

c2.execute('SELECT ...')
c2_list = c2.fetchall()

conn = pymssql.connect(server, user, password, database)
cursor = conn.cursor(as_dict=True)

cursor.execute('SELECT * FROM persons WHERE salesrep=%s', 'John Doe')
for row in cursor:
 print("ID=%d, Name=%s" % (row['id'], row['name']))

conn.close()

with pymssql.connect(server, user, password, database) as conn:
 with conn.cursor(as_dict=True) as cursor:
  cursor.execute('SELECT * FROM persons WHERE salesrep=%s', 'John Doe')
  for row in cursor:
   print("ID=%d, Name=%s" % (row['id'], row['name']))

with pymssql.connect(server, user, password, database) as conn:
 with conn.cursor(as_dict=True) as cursor:
  # 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', ('Jane Doe',))
  for row in cursor:
   print("ID=%d, Name=%s" % (row['id'], row['name']))