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05-31-2008
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data base update
hello everyone I need to update data base in file 1-ID 2-Name 3-ID group 4-ID teacher 5-mark list unique ID is (ID+ID group+ID teacher) we can append 5 th columns (marks list) main base file: Code: Code:
1:John:3:1:4 3 2 2:Mark:1:2:1 3 3:Susan:3:4: input file: Code:
2:Mark:1:2:1 3 5 6 3:Susan:3:4:2 4 3 main base file after update: Code:
1:John:3:1:4 3 2 2:Mark:1:2:1 3 5 6 3:Susan:3:4:2 4 3 I have a problem with add files to array and with compare student ID Code:
awk 'BEGIN {x=0}{z=0}{y=0}
{getline base[x++] < "base" }
{getline input[z++] < "input" }
END
{for (i in base)
for(n in input)
if (base[i]==input[n]) //I now, it's not OK column 1,3,4 must be ==
output[y++]=input[n]
else
output[y++]=base[i]
}
{for (z in output)
print output[z] > "base"}'
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05-31-2008
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