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| forma normale | |||
| forma normale (" In a relational database, an approach to structuring (organizing) information in order to avoid redundancy and inconsistency and to promote efficient maintenance, storage, and updating. Several "rules" or levels of normalization are accepted, each a refinement of the preceding one. Boyce-Codd Normal Form (BCNF), fourth normal form (4NF), and projection-join (or fifth) normal form (PJ/NF or 5NF) are not as commonly used as the first, second, and third normal forms.") | |||
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normal form : 21 短语, 4 学科 |
| 信息技术 | 17 |
| 农业 | 2 |
| 微软 | 1 |
| 行业 | 1 |