However, in the absence of data distributions, the database server calculates selectivity for filters of different types based on table indexes.

但是，如果没有数据分布，则数据库服务器根据表索引计算不同类型的过滤器的选择率。

youdao

The concept, types and distributions of subtle reservoirs developed in Taibei sag are analyzed and dis-cussed.

分析并探讨了台北凹陷隐蔽油气藏发育的概念类型与分布。

youdao

Topographic features as well as types and distributions of sediments in Qingdao coast zone and adjacent sea areas are introduced by the authors.

研究了青岛海岸带及邻近海域的地形特征、沉积物类型及分布特征。

youdao

Power-law patterns are similar to the statistical distributions of seismic activity, which inspires hope of predicting both types of calamity.

ECONOMIST: A new aid to investment: the Richter scale

Different tribal and sectarian histories, different types of monarchies or dictatorships, the heterogeneous effect of the collapse of the Ottoman Empire, European colonialism, different geographic distributions of fossil fuel within the region, all contribute to a unique manifestation of populism and uprisings.

FORBES: The Arab Spring -- Energy And The Road To Democracy?