2012年计算机二级Access考前重点分析（5）-Mysql Tutorial-php.cn

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2012年计算机二级Access考前重点分析（5）

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Jun 07, 2016 pm 03:02 PM

accessLevel 2analyzeBefore the examcomputer

替换数据在操作数库表时，如果要修改多处相同的数据，可以使用Access的替换功能，自动将?找到的数据更新为新数据。 1．替换指定内容在Access中，通过使用?找和替换对话框可以在指定的范围内将指定查找内容的所有记录或某些记录替换为新的内容。例2.30 ?找

替换数据
　　在操作数库表时，如果要修改多处相同的数据，可以使用Access的替换功能，自动将?找到的数据更新为新数据。
　　1．替换指定内容
　　在Access中，通过使用“?找和替换”对话框可以在指定的范围内将指定查找内容的所有记录或某些记录替换为新的内容。
　　例2.30 ?找“教师”表中“政治面目”为“团员”的所有记录，并将其值改为“党员”。操作步骤如下：
　　（1）用“数据表”视图打开“教师”表，单击“政治面目”字段选定器。
　　（2）单击“编辑”菜单中的“替换”命令，打开“?找和替换”对话框。
　　（3）在“?找内容”框中输入“团员”，然后在“替换为”框中输入“党员”，在“?找范围”框中确保选中当前字段，在“匹配”框中，确保选中“整个字段”。
　　（4）如果一次替换一个，单击“?找下一个”按钮，找到后，单击“替换”按钮。如果不替换当前找到的内容，则继续单击“?找下一个”按钮。如果要一次替换出现的全部指定内容，则单击“全部替换”按钮。这里单击“全部替换”按钮，这时屏幕将显示一个提示框，提示进行替换操作后将无法恢复，询问是否要完成替换操作。
　　（5）单击“是”按钮，进行替换操作。
　　2．更改默认设置
　　在进行查找和替换操作时，有时希望以全字匹配方式搜索当前字段；有时则希望搜索所有字段，并且只需符合字段的任一部分即可；而有时则要搜索与当前字段起始字符匹配的数据，这时可以通过更改系统默认设置来实现。更改系统默认设置的具体操作步骤如下：
　　（1）在“数据库”窗口中，单击“工具”菜单中的“选项”命令，打开“选项”对话框。
　　（2）单击“编辑／?找”选项卡。
　　在“默认?找／替换方式”选项组中，单击所需的单选按钮。其中，选择“快速搜索”将以全字匹配方式搜索当前字段。选择“常规搜索”将搜索所有字段，并且只需符合字段的任一部分即可。选择“与字段起始处匹配的搜索”则搜索当前字段并且与字段起始字符匹配。
　　（4）单击“确定”按钮。

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