Database Management
Database (sometimes spelled database) is also called an electronic database, referring to any collections of data, or information, that is specially organized for rapid search and retrieva l by a computer. Databases are structured to facilitate the storage, retrieva l modification and deletion of data in conjunction with various data-processing operations. Database can be stored on magnetic disk or tape, optical disk, or some other secondary storage device.
A database consists of a file or a set of files. The information in the these files may be broken down into records, each of which consists of one or more fields are the basic units of data storage, and each field typically contains information pertaining to one aspect or attribute of the entity described by the database. Using keywords and various sorting commands, users can rapidly search, rearrange, group, and select the fields in many records to retrieve or create reports on particular aggregates of data.
數(shù)據(jù)庫(kù)管理
數(shù)據(jù)庫(kù)（有時(shí)拼成Database）也稱(chēng)為電子數(shù)據(jù)庫(kù)，是指由計(jì)算機(jī)特別組織的用下快速查找和檢索的任意的數(shù)據(jù)或信息集合。數(shù)據(jù)庫(kù)與其它數(shù)據(jù)處理操作協(xié)同工作，其結(jié)構(gòu)要有助于數(shù)據(jù)的存儲(chǔ)、檢索、修改和刪除。數(shù)據(jù)庫(kù)可存儲(chǔ)在磁盤(pán)或磁帶、光盤(pán)或某些輔助存儲(chǔ)設(shè)備上。
一個(gè)數(shù)據(jù)庫(kù)由一個(gè)文件或文件集合組成。這些文件中的信息可分解成一個(gè)個(gè)記錄，每個(gè)記錄有一個(gè)或多個(gè)域。域是數(shù)據(jù)庫(kù)存儲(chǔ)的基本單位，每個(gè)域一般含有由數(shù)據(jù)庫(kù)描述的屬于實(shí)體的一個(gè)方面或一個(gè)特性的信息。用戶使用鍵盤(pán)和各種排序命令，能夠快速查找、重排、分組并在查找的許多記錄中選擇相應(yīng)的域，建立特定集上的報(bào)表。