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                # 函數 ## 調用函數 ``` ``` --- #? ### 什么是架構師 ## hexo [hexo](https://hexo.io/zh-cn/) [送你vip老師塔卡老師0基礎精講視頻](http://pan.baidu.com/s/1cjfqZs) 密碼:ee5c # 問卷調查系統 ## 1. 需求分析 業務邏輯的確定 ## 2. 設計數據庫 關系型數據庫 ## 3. 確定框架 ## 4. 寫代碼 ## 5. 測試 ## 6. 調試···修改··· ## 數據庫 - navicat for mysql - sql語句 - sqlalchemy ## 建表 ``` #!/usr/ from sqlalchemy import create_engine from sqlalchemy import Colum, func from sqlalchemy import Integer, VARCHAR, SmallInteger, TIMESTAMP from sqlalchemy.ext.declarateive import declarateive_base # 創建一個引擎 engine = create_engine('mysql+pymysql://xinlan:xxx@mysql.litianqiang.com:7150/xinlan?cha ……',max_overflow=5) Base = declarateive_base() class Questionnaire(Base): __tablename__ = 'Questionnaire_master' id = Column(Integer, primary_key=True) title = Column(VARCHAR(32)) question_num = Column(SmallInteger) join_num = Column(SmallInteger, default=0) status = Column(SmallInteger) s_time = Column(TIMESTAMP, server_default=func.now()) e_time = Column(TIMESTAMP) # 初始化 def init_db(): Base.metadata.crate_all(engine) # 刪除 def drop_db() Base.metadata.drop_all(engine) drop_db() ``` 老師我想問幾個問題: 第一:數據庫里的數據,是一個具體的文件嗎,可以通過復制粘貼備份么 第二:如果層級比較多,數據庫是不是也分很多層級 - 郵箱驗證怎么做的 有沒有好的數據庫設計規劃的工具
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