例句與造句

1. :Firstly, your result set is always 2-dimensional using any ANSI-compliant Relational DB . I assume you want to create a tree structure where for certain combinations of [ c1, c2 ], you want to " drill down " into subsets of [ d1, d2 ], or even further if joining to another table.
2. It's difficult to find relational db in a sentence. 用relational db造句挺難的