摘要：
根据杨辉三角的组合数计算方法C(n,m)=n!/[m!(n-m)!]，进行绘制 阅读全文
根据杨辉三角的组合数计算方法C(n,m)=n!/[m!(n-m)!]，进行绘制 阅读全文
摘要：
Indexing Rules of Thumb :Index every primary key and most foreign keys in the database.Attributes frequently referenced in SQL WHERE clauses are potentiallygood candidates for an index.Use a B+tree index for bothequality and range queries.Choose carefully one clusteredindex for each table.Avoid or r 阅读全文
