Question

我想计算不同产品类别中每个客户的销售总额差异。下面是一个例子。我收到了错误。请帮我说明如何才能一步到位。

ab - 客户 bc - 产品类别 bd - 金额

data a;
input ab$ bc$ bd;
datalines;
a x 5
a x 6
a y 9
a y 6
a y 5
a z 9
a z 8
b z 6
b z 9
b y 8
b y 6
b x 6
b x 6
b x 7
b z 8
b z 9

run;

proc sql;
    create table b as select ab , var (sum_bd) from(
    from (select ab, bc, sum(bd) as sum_bd from a group by ab, bc))
    group by ab;
run;

Answer 1

您有两个from条款。试试这个语法正确的版本：

proc sql;
    create table b as
        select ab, var(sum_bd)
        from (select ab, bc, sum(bd) as sum_bd
              from a
              group by ab, bc
             ) a
        group by ab;
run;

Answer 2

MySQL中没有VAR函数，它是VAR_POP或VAR_SAMP。

嵌套的sql查询来计算总和的方差

2 个答案: