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SQL Update with row_number()
...swered Nov 30 '12 at 21:48
Aleksandr FedorenkoAleksandr Fedorenko
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Print all but the first three columns
...$(i-2)=$i; NF=NF-2; print $0}' | tr ' ' '-'
3-4-5-6-7
This is the fixed and parametrized version of larsr solution:
$ echo '1 2 3 4 5 6 7' |
awk '{for(i=n;i<=NF;i++)$(i-(n-1))=$i;NF=NF-(n-1);print $0}' n=4 | tr ' ' '-'
4-5-6-7
All other answers before Sep-2013 are nice but add extra spac...
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...ontaining line:
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Then do a rake db:migrate and it'll run the new migration, creating the new column.
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9 Answers
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