SAS的FREQ过程输出结果如下：变量STYLE的标签为"Style of homes"，变量BEDROOMS的标签为"Number of bedrooms"，下程序中的哪一个产生了下面显示的输出结果______。[img=254x249]18032802df46410.jpg[/img]
A: proc freq data = sasuser.houses; tables style and bedrooms;run;
B: proc freq data = sasuser.houses; tables style * bedrooms;run;
C: proc freq data = sasuser.houses;tables style , bedrooms;run;
D: proc freq data = sasuser.houses;tables style;tables bedrooms;run;
A: proc freq data = sasuser.houses; tables style and bedrooms;run;
B: proc freq data = sasuser.houses; tables style * bedrooms;run;
C: proc freq data = sasuser.houses;tables style , bedrooms;run;
D: proc freq data = sasuser.houses;tables style;tables bedrooms;run;
举一反三
- SAS程序中过程步的引导语句是（ ）。 A: data B: input C: proc D: run
- SAS中对时间序列进行分析建模要调用的是哪个过程 A: proc gplot B: proc arima C: proc freq D: proc reg
- 数据集a中包含了股票的代码信息变量 code和行业变量ind，数据集 b中包含了股票的代码信息变量 code和股票价格p，A同学想要将两个数据集合并。正确的方式是： A: data c; merge a b; run; B: proc sort data=a ;by code; proc sort data=b; by code;run; data c; merge a b; by code; run; C: data c; set a b; run; D: data c; merge a b; by code; run;
- The number of bedrooms is
- While designing the database for one of your online transaction processing （OLTP） applications， you want to achieve the following： a） high availability of data b） faster primary key access to the table data c） compact storage for the table Which type of tables would you use to achieve these objectives？（） A: heap tables B: object tables C: partitioned tables D: indexorganized tables （IOTs）