向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除|赢在IT，Playin' with IT,Focus on Killer Application,Marketing Meets Technology.

对于写判断的语句，如for,需要放在花括号里头，{}，否则会报错，这是AWK的语法：
cat sql.txt
http://adff.com 300,300,300
http://adff1.com 300,300,300
http://adff2.com 300,300,300
http://adff3.com 300,300,300
http://adff4.com 300,300,300,300,300
cat sql.txt |awk '{a=split($2,filearray,",")}{for (i=1;i<=a;i++) printf ("%s/v=%s\n",$1,i)}'
cat sql.txt |awk '{a=split($2,filearray,",")}{for (i=1;i<=a;i++) printf ("%s/v=%s\n",$1,i)}'
http://adff.com/v=1
http://adff.com/v=2
http://adff.com/v=3
http://adff1.com/v=1
http://adff1.com/v=2
http://adff1.com/v=3
http://adff2.com/v=1
http://adff2.com/v=2
http://adff2.com/v=3
http://adff3.com/v=1
http://adff3.com/v=2
http://adff3.com/v=3
http://adff4.com/v=1
http://adff4.com/v=2
http://adff4.com/v=3
http://adff4.com/v=4
http://adff4.com/v=5

之前加个end，发现只输出最后一行，不对。去了END就好了，end表示其后的语句在所有语句执行后才执行，做一些计算后的总结打印输出，BEGIN表示在所有语句执行前执行：
cat sql.txt |awk '{a=split($2,filearray,",")}END{for (i=1;i<=a;i++) printf ("%s/%s\n",$1,i)}'
http://adff4.com/1
http://adff4.com/2
http://adff4.com/3
http://adff4.com/4
http://adff4.com/5

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/9840/
版权所有。转载时必须以链接形式注明作者和原始出处及本声明！