index of the performance的意思|示意

Mike Thompson of Thomson Financial says that, since 1991, the correlation between the performance of high-yield bonds and the S&P 500 index has been pretty low—less than 20%.

汤姆逊金融公司的迈克•汤姆逊这样说道，自1991年，高收益债券和标普500指数之间的相关性就非常低，不到20%。

A better way to improve the performance of this query is to create a functional index on name.

改善查询性能的一种更好的方法是对name创建函数索引。

By testing the performance parameters of experimental prototype, its performance index can meet the technical and performance requirement.

通过对试验样机的性能参数测试获得，该样机的性能指标达到了技术性能要求。

A wince-inducing glance at the share performance of 25 firms that have gone cap-in-hand shows a 50% loss since the new index's inception on January 5th, double the decline of the wider S&P 500 index.

看看一度受人尊敬的25家公司让人失望的股票表现，自1月5日建立这一指数以来，这25家公司的股票市值已缩水50%，是更具代表性的标准普尔指数500指数跌幅的两倍。

Also in the query rewrite vein, modifying a SELECT to get rid of a range-type predicate can increase performance by improving index key column matching.

另外，在查询重写状态下，修改SELECT来摆脱一个范围型谓词，可以通过提高索引键列匹配增强性能。

As the number of indexes on a table grows, eventually the aggregate CPU cost of maintaining the indexes can outweigh whatever performance gains a new index might deliver.

随着一个表上的索引数量的增加，维护索引的CPU总成本最终可能会超过新索引提供的性能收益。