awk比较两个文件并合并输出

Question

原始问题

我有2个文件1.csv和2.csv

1.csv： -

AK,BA,Alpha,1095  
ALL,SA,Alpha,9592  

2.csv： -

AK,BA,SPAM,10  

我想合并文件，以便打印输出文件，如下所示

输出： -

AK,BA,Alpha,1095,SPAM,10  
AL,SA,Alpha,9592,NA,NA  

---

更新了问题

我有2个文件alpha1.csv和SPAM1.csv

$ cat alpha1.csv  
AKTEL_BANGLADESH,BANGLADESH,Alphanumeric_A_MSISDN_blocking,1095  
ALJAWAL_SAUDI_TELECOM_COMPANY,SAUDI_ARABIA,Alphanumeric_A_MSISDN_blocking,9592  
B-MOBILE_BRUNEI,BRUNEI,Alphanumeric_A_MSISDN_blocking,3  


$ cat SPAM1.csv  
AIN_AIS_GLOBAL_COMMUNICATIONS,THAILAND,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),1  
AKTEL_BANGLADESH,BANGLADESH,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),16  
ALJAWAL_SAUDI_TELECOM_COMPANY,SAUDI_ARABIA,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),10593  
AT&T_WIRELESS,UNITED_STATES,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),218  
BANGLALINK_SHEBA_BANGLADESH,BANGLADESH,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),111  

预期产出：

AIN_AIS_GLOBAL_COMMUNICATIONS,THAILAND,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),1,**NA,NA**  
AKTEL_BANGLADESH,BANGLADESH,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),16,Alphanumeric_A_MSISDN_blocking,1095  
ALJAWAL_SAUDI_TELECOM_COMPANY,SAUDI_ARABIA,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),10593,Alphanumeric_A_MSISDN_blocking,9592  
AT&T_WIRELESS,UNITED_STATES,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),218,**NA,NA**  
BANGLALINK_SHEBA_BANGLADESH,BANGLADESH,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),111,**NA,NA**  
B-MOBILE_BRUNEI,BRUNEI,**NA,NA**,Alphanumeric_A_MSISDN_blocking,3  

我的命令只打印文件2的匹配案例，而不打印不匹配的案例：

$ awk 'BEGIN{FS=OFS=","} FNR==NR {a[$1,$2]=$3 FS $4; next} {print $0, (i=a[$1,$2]?a[$1,$2]:"NA,NA")}' alpha1.csv SPAM1.csv  
AIN_AIS_GLOBAL_COMMUNICATIONS,THAILAND,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),1,NA,NA  
AKTEL_BANGLADESH,BANGLADESH,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),16,Alphanumeric_A_MSISDN_blocking,1095  
ALJAWAL_SAUDI_TELECOM_COMPANY,SAUDI_ARABIA,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),10593,Alphanumeric_A_MSISDN_blocking,9592  
AT&T_WIRELESS,UNITED_STATES,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),218,NA,NA  
BANGLALINK_SHEBA_BANGLADESH,BANGLADESH,SPAM_CHAIN_SMS_REJECT(Spam_Detection_and_Blocking),111,NA,NA  

Answer 1

您可以使用此功能，例如：

$ awk 'BEGIN{FS=OFS=","} FNR==NR {a[$1,$2]=$3 FS $4; next} {print $0, (($1,$2) in a?a[$1,$2]:"NA,NA")}' f2 f1
AK,BA,Alpha,1095,SPAM,10
ALL,SA,Alpha,9592,NA,NA

解释

• BEGIN{FS=OFS=","}将输入和输出字段分隔符设置为逗号。
• FNR==NR {a[$1,$2]=$3 FS $4; next}将第3个和第4个值存储在数组a[]中，其索引为元组($1,$2)。
• {print $0, (($1,$2) in a?a[$1,$2]:"NA,NA")}将该行与数组中匹配的项一起打印出来。如果没有这样的元素，则打印NA,NA。