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                # 數據庫(database)數據庫是一些關聯表的集合 ## 數據表(table): 表是數據的矩陣,在一個數據庫種的表看起來像一個簡單的電子表格。 ## 列/字段(column): 一列(數據元素)包含了相同的數據。 ## ## 字段類型: 規定字段類型可以儲存什么樣的類型(數值,浮點,字符串等,時間) ## 行(row):一行(=元組,或者記錄)是一組相關的數據,例如一條用戶訂閱的數據。
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