sqlserver 同步数据库表结构（python实现，适用于同步全部表结构）
第一种：
直接上代码，可以直接运行
import decimal
import logging
import pymssql
"""适用于一个库有，一个库没有的,同步表结构"""
class Copy_Mes_Bank():
def __init__(self, **kwargs):
self.sou_conn = kwargs['sou_conn']
self.tar_conn = kwargs['tar_conn']
"""根据SQL查询数据库数据，返回查询结果tuple类型的数据"""
def fetch_data(self, cur, sql):
try:
cur.execute(sql)
results = cur.fetchall()
return results
except Exception:
print('数据库查询失败')
"""获取库下所有表名"""
def get_table_name(self):
sou_cur = self.sou_conn.cursor()
sql = 'select name,schema_id from %s.sys.tables' % database
tar_tables = self.fetch_data(sou_cur, sql)
return tar_tables
"""获取表结构"""
def get_db_flat(self,table_names):
sou_cur = self.sou_conn.cursor()
sql = 'sp_columns {}'.format(table_names)
tar_flat = self.fetch_data(sou_cur, sql)
flat_list = []
for x in tar_flat:
item = {
}
item['key'] = x[3]
item['type_name'] = x[5]
# 判断类型
if item['type_name'] in ['int', 'int identity', 'datetime','bigint','timestamp','text','image','uniqueidentifier','bigint identity','nvarchar',]:
item['length'] = 'NOT NULL'
else:
item['length'] = x[7]
flat_list.append(item)
return flat_list
# """获取表主键"""
def get_primary(self,table_names):
sou_cur = self.sou_conn.cursor()
sql = "SELECT TABLE_NAME,COLUMN_NAME FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE TABLE_NAME= '{}'".format(table_names)
tar_primary = self.fetch_data(sou_cur, sql)
return tar_primary
def modile_flat(self,table_names):
"""
(id INT NOT NULL, name VARCHAR(100), salesrep VARCHAR(100), PRIMARY KEY(id))
"""
flat_list = self.get_db_flat(table_names)
primsry_name = self.get_primary(table_names)
new_flat = []
# 构建单独语句
for x in flat_list:
if x['type_name'] in ['int', 'int identity', 'datetime','bigint','timestamp','text','image','uniqueidentifier','bigint identity','nvarchar']:
sql_s = str(x['key']) + ' ' + str(x['type_name']) + ' ' + str(x['length'])
else:
sql_s = str(x['key']) + ' ' + str(x['type_name']) + '(' + str(x['length']) + ')'
new_flat.append(sql_s)
# 构建主键语句
if primsry_name:
primsry_s = 'PRIMARY' + ' ' + str('KEY({})'.format(primsry_name[0][1]))
new_flat.append(primsry_s)
# 转换为str类型，清洗
str_flat = str(new_flat).replace("'", '').replace("[", '').replace("]", '')
return str_flat
"""创建表"""
def creat_table(self, table_names):
flat_new = self.modile_flat(table_names)
tar_cur = self.tar_conn.cursor()
table_name = table_names
sql = "IF OBJECT_ID('{}', 'U') IS NOT NULL DROP TABLE {} CREATE TABLE {} ({})".format(table_name, table_name,
table_name, flat_new)
print(sql)
tar_cur.execute(sql)
tar_conn.commit()
print('创建表成功')
print('********')
"""开始"""
def run(self):
table_name_list = self.get_table_name()
for t_name in table_name_list:
print('本次创建表名：', t_name[0])
self.creat_table(table_names=t_name[0])
if __name__ == '__main__':
"""表信息"""
"""源表"""
source_ip = '192.168.130.xx'
source_user = 'sa'
source_pwd = 'xxxx'
"""目标表"""
target_ip = '192.168.xxx'
target_user = 'sa'
target_pwd = 'xxx'
"""目标库"""
database = 'HYDB'
"""开始"""
sou_conn = pymssql.connect(host=source_ip, port='1433', user=source_user, password=source_pwd, database=database,
charset='utf8')
tar_conn = pymssql.connect(host=target_ip, port='1434', user=target_user, password=target_pwd, database=database,
charset='utf8')
datas = Copy_Mes_Bank(sou_conn=sou_conn, tar_conn=tar_conn)
datas.run()
sou_conn.close()
tar_conn.close()