Does choosing proper dataype will improve the performance? [closed]

Does choosing proper dataype will improve the performance? [closed]

References

Reference NO 1

http://docs.oracle.com/cd/E21764_01/web.1111/e13737/ds_tuning.htm

Reference NO 2

http://stackoverflow.com/questions/2623082/for-databases-does-choosing-the-correct-data-type-affect-performance

Reference NO 3

http://www.precisejava.com/javaperf/j2ee/JDBC.htm

Reference NO 4

http://office.microsoft.com/en-us/access-help/create-and-use-an-index-to-improve-performance-HA010210347.aspx

Reference NO 5

http://www.apple.com/batteries/iphone.html

Reference NO 6

http://en.wikibooks.org/wiki/Optimizing_C%2B%2B/Writing_efficient_code/Performance_improving_features

Reference NO 7

http://www.raywenderlich.com/31166/25-ios-app-performance-tips-tricks

Reference NO 8

http://support.quickbooks.intuit.com/support/articles/SLN54633