Contains help about designing tables by adding and removing columns and changing column properties.

包含有关通过添加和移除列以及更改列属性来设计表的帮助信息。

youdao

Contains help about designing tables by adding and removing columns and changing column properties.

包含有关通过添加和移除列以及更改列属性来设计表的帮助信息。

youdao