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| # | Name | Comments | Duration | Released |
|---|---|---|---|---|
| 22 | Eager Loading (revised) | 223 comments | 7 minutes | Mar 20, 2013 |
| 343 | Full-Text Search in PostgreSQL pro | 131 comments | 16 minutes | Apr 17, 2012 |
| 202 | Active Record Queries in Rails 3 | 71 comments | 10 minutes | Feb 22, 2010 |
| 14 | Performing Calculations on Models | 35 comments | 2 minutes | Apr 04, 2007 |
| 108 | named_scope | 69 comments | 11 minutes | May 19, 2008 |
| 23 | Counter Cache Column | 69 comments | 7 minutes | Apr 25, 2007 |
| 22 | Eager Loading | 54 comments | 4 minutes | Apr 23, 2007 |