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(Showing Draft Content)

添加或删除表

功能概述

在创建模型时,一般会在向导中勾选一些数据表,而进入设计器后也经常需要增加或删除数据表。

在添加新表时,可以直接绑定已有的数据表也可以通过SQL查询的方式创建新表。

添加表

1. 单击设计画布上方的添加表

image

2. 输入新表的名称。

image

3. 绑定表。我们有两种方法可以绑定表,一是通过直接选择数据库中的表;二是通过 SQL 表达式。

如果选择,则选择数据库中所需的数据表,并验证。

image


如果选择SQL查询,则根据当前所连数据库的语法输入表达式语句,并验证。

image

type=info

提示

如果使用的是 DB2 数据库,那么在使用聚合列时需要为列添加别名,否则将会预览失败。

例如:

image2021-8-24_14-37-29.png

4. 无论使用表还是 SQL 的方式,只有通过验证后,才可以单击添加按钮。

type=info

提示

可设置该表是否隐藏。

image2021-4-12_17-11-59.png

5. 可见新增加的表已经出现在数据表列表中了。

image

type=info

提示

通过SQL查询语句添加的新表,支持再次编辑修改。所以表右侧多一个铅笔按钮image2022-11-3_12-24-53.png,单击之后可进入编辑界面。修改后需要再次验证,然后保存修改。

单击预览按钮,可预览表。

image

删除表

方法一:

在表上单击更多按钮,然后选择删除表

image

在弹出的对话框点击

image


方法二:

在画布当中单击表,然后单击弹出的删除按钮。

image2021-4-13_17-30-10.png


然后在弹出的对话框点击

image