I can fetch too many columns, or leave off important structural database features, like indexes or null constraints.

我所能获取的列太多，又很容易遗漏重要的结构化数据库特性，比如索引或空约束。

youdao

I can fetch too many columns, or leave off important structural database features, like indexes or null constraints.

我所能获取的列太多，又很容易遗漏重要的结构化数据库特性，比如索引或空约束。

youdao