音译汉 During a typical day,you’re likely to encounter many types of databases,such as a library card catalog,a banking database that contains your checking account balances,CD-ROM encyclopedias,your computer’s directory of files,and your e-ma
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![音译汉 During a typical day,you’re likely to encounter many types of databases,such as a library card catalog,a banking database that contains your checking account balances,CD-ROM encyclopedias,your computer’s directory of files,and your e-ma](/uploads/image/z/14986257-33-7.jpg?t=%E9%9F%B3%E8%AF%91%E6%B1%89+During+a+typical+day%2Cyou%E2%80%99re+likely+to+encounter+many+types+of+databases%2Csuch+as+a+library+card+catalog%2Ca+banking+database+that+contains+your+checking+account+balances%2CCD-ROM+encyclopedias%2Cyour+computer%E2%80%99s+directory+of+files%2Cand+your+e-ma)
音译汉 During a typical day,you’re likely to encounter many types of databases,such as a library card catalog,a banking database that contains your checking account balances,CD-ROM encyclopedias,your computer’s directory of files,and your e-ma
音译汉
During a typical day,you’re likely to encounter many types of databases,such as a library card catalog,a banking database that contains your checking account balances,CD-ROM encyclopedias,your computer’s directory of files,and your e-mail address book.You might also interact with collections of information accessed via the internet,such as Web sites devoted to hip-hop music,the stock market,the job market,or travel.
Databases come in two “flavors”:structured databases and freeform databases.A structured database(also called a “structured data file”)is a file of information organized in a uniform format of records and fields.Figure 3-30 shows an example of a record from a structured database for a library card catalog.
音译汉 During a typical day,you’re likely to encounter many types of databases,such as a library card catalog,a banking database that contains your checking account balances,CD-ROM encyclopedias,your computer’s directory of files,and your e-ma
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