nested set model造句

例句与造句

1. A relational-database implementation of a hierarchical model was first discussed in published form in 1992 ( see also nested set model ).
2. The "'nested set model "'is to number the nodes according to a tree traversal, which visits each node twice, assigning numbers in the order of visiting, and at both visits.
3. He is credited with coining the term lasagna code and popularizing Michael J . Kamfonas'nested set model for trees in SQL, a taxonomy of data encoding schemes, and several other design patterns in SQL DDL and DML.
4. It's difficult to find nested set model in a sentence. 用nested set model造句挺难的