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| 数据库中若干问题的探讨 | |
| 引用本文： | 王海燕. 数据库中若干问题的探讨[J]. 地球科学与环境学报, 1998, 20(1): 92 |
| 作者姓名： | 王海燕 |
| 作者单位： | 陕西师范大学电化教育系,西安,710062 |
| 摘 要： | 在使用ＦｏｘＢＡＳＥ＋或ＦｏｘＰｒｏ数据库中，发现了三个问题：即用ＩＮＤＥＸ命令只能建立按关键字表达式值的升序排列的索引文件，不能按降序建立索引文件；用ＴＯＴＡＬ命令只能按单关键字段进行分类汇总，不能按多关键字段进行分类汇总；数据库中的数组最高只能是二维的，不能实现三维数组的功能。针对这三个问题，提出了相应的解决办法。 |
| 关 键 词： | FoxBASE~＋；FoxPro；降序；索引文件；关键字段；分类求和 |
| 修稿时间： | 1997-06-25 |
RESEARCH ON SEVERAL PROBLEMS IN DATABASE |
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| Wang Haiyan. RESEARCH ON SEVERAL PROBLEMS IN DATABASE[J]. Journal of Earth Sciences and Environment, 1998, 20(1): 92 | |
| Authors: | Wang Haiyan |
| Affiliation: | Wang Haiyan;( |
| Abstract: | three problems have been found during using FoxBASE of FoxPro:1.By using INDEX command index file on keywords ?value can only be arranged in increase order,not in decrease order;2.By using TOTAL command classifying and collecting can only be done on single keywords,not on multiple keywords;3.The number groups in database are confined to two array not three array Appropriate solutions to the problems have been put forward in this paper. |
| Keywords: | FoxBASE FoxPro Decrase order Index file Keyfiled Classifying and colleting |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |