But not always, because the order of the columns in the index can make a big difference depending on the query. For example, consider this query.
但也不一定，因为索引中列的顺序也许会根据查询而有很大差异。
With the impact and vibration of the crane, it may cause the rail installation loose, the connector fall off, deformation, crack, precision index super difference.
随着起重机运行时产生的冲击和振动，可能引起轨道安装的松动、连接件脱落、变形、裂纹、精度指标超差。
If the refractive index is larger, the translocation difference of the measurement volume is larger.
管壁材料的折射率越大，测量体的位置与管壁厚趋时位移差也越大。
The difference of revenue is an important index reflecting whether a society is equal.
收入的差异是反映一个社会是否平等的重要指标。
The rate of community dissimilarity index increased with the increasing the altitude difference.
随着海拔差的增加，群落相似性指数增加率也是不同的。
The colour index difference Q decreases with the increase of d.
随着子源间线距d的增大，色指数差q下降。
The relative change rate of land use type is an index reflecting regional difference of change of land use .
土地利用类型的相对变化率是一种反映土地利用变化地区差异性的指标。
Because the changing of source water, obvious variety of total degree hardness index about the new source water caused the difference on residents' taste.
结果显示因供水水源的更换，新供水系统总硬度指标显著变化，导致口感差异；
Gender and grade are the main index on measuring the significant difference of master's occupation demand.
性别和年级成为硕士研究生职业需求存在显著性差异的主要衡量指标。
There is difference in total positive symptoms and global severity index about each major, the mental health of majors in folk traditional sport is higher.
各专业之间在总均分和阳性项目数方面也表现出差异，民族传统体育学专业总体心理健康水平较高。
Results the total dose of anesthetic applied to both groups was close, and there was no difference in every observed index of induction, anesthesia maintenance and after removing intratracheal tube.
结果单泵混用组与双泵并用组用药总量相近，诱导期、麻醉维持期和停药拔管后各观察指标无明显差异。
Compared with the CRMS, the height, leaf area index and biomass of rice in IRDFS decreased and there was a significant difference during the tillering and heading stage.
与常规水稻栽培方式相比，鸭稻共作方式下水稻株高、叶面积指数、生物量有减小的趋势，而且在有效分蘖期和幼穗分化期存在着显著或极显著差异。
The climate comfort -index of the rural human settlements environment in China have standing regional difference.
中国乡村人居环境的气候舒适指数有明显的区域差异。
If you want to measure the impact of a certain change to the database (a new index, for example), you'll need to take a baseline measurement, make the change and then measure the difference.
如果您想要测量数据库(新索引，例如)进行某些更改的影响，您需要获取基准测量，进行更改然后再衡量的差异。
The statistical difference of POD was showed firstly, the second index was tree stem capacitance, the third one was tree stem impedance and the last one was PPO.
时间顺序上，POD酶活性在统计学上最先表现出显著的差异性，其次是树体干部电容，之后是树体干部阻抗，最后是PPO酶活性。
The dividing principle of pest control index, the difference and suitable ranges of 4 important index types, and 3 basic methods in determining control index are discussed.
本文论述了森林害虫防治指标的划分原则，4种主要指标类型的区别及适用范围，及确定防治指标的三种基本方法。
The paper made empirical analysis on the influence of macroeconomic index on the regional difference based on panel data′s unit root test, cointegration test, etc.
利用面板数据单位根检验、协整检验等计量经济学方法，实证分析了宏观经济指标对财产保险业务规模和赔付水平区域差异性的影响。
According to the grade similarity and significance of difference of the productivity, we make cot the planting district of Picea Kdreainsis, and give out the hydro-thermal index.
对其可靠性和精度进行了分析和检验，根据生产力等级相似性和差异显著性原理，进行了栽培区划，给出各栽培区、亚区的水热特征临界值指标。
The conclusion shows, the index can evaluate the appropriateness of Fujian province tour climate and tour comfort possesses regional difference and reciprocity.
结果显示该指标能较好评价福建省的旅游气候适宜性，旅游舒适度具有区域的差异性和互补性。
The changing tendency of the physical index of soil mass shows obvious difference with the change of depth due to the action of cyclic loading.
循环荷载作用使土体的物性指标变化趋势因深度的不同而具明显的差异性。
The results show that the increasing rate of both general money and narrow money and their difference have remarkable effect on the fluctuation of price index.
结果表明：广义货币和狭义货币的增长率以及两者之差对物价指数的波动均有较显著的影响。
Soil nutrient index of 6 different utilization patterns in research area was measured. Significance of difference and soil nutrient level in different utilization patterns were comparatively analyzed.
通过对研究区6种不同利用模式下土壤养分指标的测定，对比分析出各利用模式间土壤养分含量水平和差异显著性。
Transmission characteristics of light beam in different media are distinctive. Difference of refractive index of air and seawater is a determination factor that affects laser transmission.
光在不同介质中的传播特性不同，大气和海水折射率的差别是影响激光传输的决定性因素。
Factor of soil circumstance was an index of rocky desertification type and indicated the spatial difference of lithology.
土壤环境因子表征了石漠化在空间上岩性的差异特征，是石漠化类型的表现指标。
Through the transformation of color space and the use of the up-to-date formula of color difference, the evaluating index such as SCAPSNR of the colorful images is defined.
通过色彩空间转换，并使用最新的色差公式定义了彩色图像感知色差峰值信噪比等图像质量评价指标。
In the novel world of Zijian Chi builds, "nature" and "imagination" are the two most important index keywords, difference is more directional than inner survival and the external space of person.
在迟子建的小说世界中，“自然”与“想象”是两个至为重要的索引关键词，分别指向于人的外部空间与内在生存。
The time of chewing food correlated significantly with glycemic index, insulinemic index and the satiety index, which partly explained the metabolic difference among the rice samples.
进餐速度与血糖指数、胰岛素指数和饱腹感均具有极显著相关性，可以部分解释不同米饭之间的代谢差异。
Compared with the single index of setae dispersion rate, the integrated index could show roundly and exactly the adaptability difference between silkworm varieties for artificial diet rearing.
与疏毛率等单项指标相比，利用综合适应性指数能够更全面、准确地反映出品种间对人工饲料育的适应性差异。
By adjusting the difference of refractive index of the double layer film, single mode operation can be realized with a certain waveguide thickness.
通过改变外延生长工艺来调节两层薄膜的折射率，可在一定波导的厚度范围内实现单模传输。
By adjusting the difference of refractive index of the double layer film, single mode operation can be realized with a certain waveguide thickness.
通过改变外延生长工艺来调节两层薄膜的折射率，可在一定波导的厚度范围内实现单模传输。
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