表1展示了在保持信息安全时所面临的挑战，并提供了DB2和IDS中可用的解决方案。
Table 1 shows the challenges in keeping information secure and provides solutions available in DB2 and IDS.
从软件版本到谁有一个机器的“登记手续”，希望每个人都在电子数据表上保持最新的信息。
From software versions to who had a machine "checked out", everyone was supposed to keep the information in the spreadsheets up to date.
即使表的行数保持一致，使用由RUNSTATS更新的统计信息来更改数据内容可以产生不同的、也许更好的访问路径。
Even if the number of rows in a table remains consistent, changes in data contents can result in different, and hopefully better, access paths using statistics updated by RUNSTATS.
必须保持统计信息是最新的，并尽可能收集更多关于表和统计的信息。
It is important to keep the statistics up to date, and to collect as much information about the tables and statistics as possible.
当启用xml列时，使用这个DAD文件中的信息创建insert、update和delete触发器，从而帮助副表与XML文档保持同步。
The information in the DAD file is used, when the XML column is enabled, to create the insert, update and delete triggers that help in keeping the side tables in sync with the XML document.
当启用xml列时，使用这个DAD文件中的信息创建insert、update和delete触发器，从而帮助副表与XML文档保持同步。
The information in the DAD file is used, when the XML column is enabled, to create the insert, update and delete triggers that help in keeping the side tables in sync with the XML document.
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