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The following command will print the 3rd column in file input.txt: awk '{print $3}' input.txt Using redirect to output the re...

I talked about how to select first/top n rows from oracle, mysql, and ms sql server. How do we get the range, say from m to n , where m O...

Assume we have table customer with columns id and age . Find first n customers with youngest ages Oracle select * from (select * from cus...

I recently wanted to use oracle MERGE INTO to update a table. With MERGE INTO, it usually works with 2 tables, a source and a target table....

I have been using Git for more than a year. Comparing with SVN, the big difference is how to commit the changes to remote repository. Git...

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