java - 如何按列值分组到行和列标题中，然后动态对列求和

Question

这个问题已经有答案了:

How to group by column values into Row and column header and then sum the value (3 个回答)

已关闭 6 年前。

下面是我的输入和输出.txt文件。

我想按StatusDate对数据进行分组和Method 。然后根据 StatusDate 对值求和和Method .

输入.txt

No,Date,MethodStatus,Key,StatusDate,Hit,CallType,Method,LastMethodType
112,12/15/16,Suceess,Geo,12/15/16,1,Static,GET,12/15/16
113,12/18/16,Suceess,Geo,12/18/16,1,Static,GET,12/18/16
114,12/19/16,AUTHORIZED,Geo,12/19/16,1,Static,GET,12/19/16
115,12/19/16,AUTHORIZED,Geo,12/19/16,1,Static,GET,12/19/16
116,12/19/16,Suceess,Geo,12/19/16,1,Static,PUT,12/19/16
117,12/19/16,Suceess,Geo,12/19/16,1,Static,PUT,12/19/16
118,12/19/16,Waiting,Geo,12/19/16,1,Static,GET,12/19/16
119,12/19/16,AUTHORIZED,Geo,12/19/16,1,Static,GET,12/19/16
120,12/17/16,Suceess,Geo,12/17/16,1,Static,GET,12/17/16
121,12/17/16,Suceess,Geo,12/17/16,1,Static,GET,12/17/16
130,12/16/16,Suceess,Geo,12/16/16,1,Static,GET,12/16/16

Out.txt

StatusDate,12/15/16,12/16/16,12/17/16,12/17/16,12/18/16,12/19/16,12/19/16,12/19/16,12/19/16,12/19/16,12/19/16,Grand Total
GET,1,1,1,1,1,1,1,1,1,,,9
PUT,,,,,,,,,,1,1,2
Grand Total,1,1,1,1,1,1,1,1,1,1,1,11

我正在使用awk并将数据分割为 awk -F, '{if($8=="GET") print }' ，然后计算总和值。由于文件较大，因此存在延迟。

是否可以一步完成所有事情？那么文件操作会减少吗？

Answer 1

您可以使用如下所示的 GNU awk 脚本:

脚本.awk

BEGIN { PROCINFO["sorted_in"] = "@ind_str_asc" }

function remember( theDate, mem) {
    mem[   theDate] +=1
    # in Totals the column sum is stored for each possible date (i.e the columns)
    Totals[theDate] += 1
}

# with header 0 or 1 the first line in output is differentiated
# OFS is used, so it is possible to use a commandline option like 
# -v OFS='\t' or  -v OFS=','
function printMem( mem, name, header ) {
    printf("%s%s",name,OFS)
    sum=0
    for( k in Totals ) { 
        if( header) 
            printf("%s%s", k, OFS )
        else { 
            printf("%s%s", mem[k], OFS )
            sum += mem[k]
        }
    }
    if(!header) 
        printf("%s", sum )
    else 
        printf("Grand Total")
    print ""
}

# different methods are stored in different arrays
$8 == "GET" { remember( $2, get ) }
$8 == "PUT" { remember( $2, put ) }

END { # print the stored values
      # the first line header
      printMem( Totals , "StatusDate", 1)
      printMem( get    , "GET", 0)
      printMem( put    , "PUT", 0)
      # the summary line
      printMem( Totals , "Grand Total", 0)
    }

像这样运行脚本:awk -F, -v OFS=',' script.awk Input.txt