You can create a visual diagram of your database using the database designer 可以使用數(shù)據(jù)庫設(shè)計(jì)器創(chuàng)建數(shù)據(jù)庫的可視化關(guān)系圖。
The following shortcut key combinations can be used in the database designer or query designer 下列快捷組合鍵可用于數(shù)據(jù)庫設(shè)計(jì)器或查詢設(shè)計(jì)器。
Lists the shortcut key combinations available when using the query designer or database designer 列出了當(dāng)使用“查詢”設(shè)計(jì)器或“數(shù)據(jù)庫”設(shè)計(jì)器時可用的快捷組合鍵。
How to use the visual database tools database designer , table and view designer , and query designer 如何使用可視化數(shù)據(jù)庫工具,如數(shù)據(jù)庫設(shè)計(jì)器、表和視圖設(shè)計(jì)器以及查詢設(shè)計(jì)器。
Many types of developers , such as database designers or web site developers , work with the database engine 許多類型的開發(fā)人員(如數(shù)據(jù)庫設(shè)計(jì)人員或網(wǎng)站開發(fā)人員)都使用數(shù)據(jù)庫引擎。
The database designer is a visual tool that allows you to design and visualize a database to which you are connected 數(shù)據(jù)庫設(shè)計(jì)器是一種可視化工具,它允許您對所連接的數(shù)據(jù)庫進(jìn)行設(shè)計(jì)和可視化處理。
When designing a database , you can use database designer to create , edit , or delete tables , columns , keys , indexes , relationships , and constraints 設(shè)計(jì)數(shù)據(jù)庫時,可以使用數(shù)據(jù)庫設(shè)計(jì)器創(chuàng)建、編輯或刪除表、列、鍵、索引、關(guān)系和約束。
To be effective , it must be simple enough to communicate the required data structure to the end user , yet detailed enough that the database designer can create the physical structure 為了是資料模型更加有效,它必須足夠簡單以使最終用戶能夠溝通必需的資料結(jié)構(gòu),同時它也要足夠詳細(xì)以使資料庫設(shè)計(jì)人員能夠建立物理結(jié)構(gòu)。
Consider this extreme example : if the record size is somewhat bigger than half of a data page , almost half the space on each data page is wasted . some database designers opt for wide table design and port their mainframe database schema down to the device 試考慮下面的極端示例:如果記錄大小稍大于數(shù)據(jù)頁的一半,每個數(shù)據(jù)頁就會浪費(fèi)幾乎一半的空間。一些數(shù)據(jù)庫設(shè)計(jì)人員會選用寬表設(shè)計(jì)方案并將主機(jī)數(shù)據(jù)庫架構(gòu)移植到設(shè)備上。