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  Removing duplicates in sql

In modern web development, it’s standard practice to make use of a database abstraction layer, typically an Object-Relational Mapper based on either the Active Record pattern or the Data Mapper pattern. There are several pros and cons to this which are fairly well established, so I’ll spare us all from enumerating them all right now.One established pro worth mentioning is that these systems typically provide a high level interface for fetching data, often removing the need to ‘hand write’ SQL for anything but the most complex of query.As good as this sounds it h...

3,385 0       SQL WEB DESIGN DUPLICATE REMOVE