batch file - copy specific value from text1 to text2 by dos -

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i need copy specific value text1 text2 dos batch.

text1 that;

20130701,xxxx,xxxx,xxx  20130702,yyyy,yyy,yyyyyyy

i want copy "20130701" line text1 text2, using dos command. help.

this create text2.txt lines text1.txt start 20130701

findstr "^20130701" <"text1.txt"  >"text2.txt"

original answer below:

set text1=20130701,xxxx,xxxx,xxx  set text2=20130702,yyyy,yyy,yyyyyyy  set text3=%text1:~0,8%%text2:~8%  echo %text3%

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