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You can use a PRIMARY KEY or a UNIQUE Index on a table with the appropriate fields to stop duplicate records.Let us take an example – The following table contains no such index or primary key, so it would allow duplicate records for first_name and last_name.

The procedure is designed to move data stored in an existing table to a new table object that has the same name but that may have been defined in a different table space.Consequently, such operations were not performed very often, if at all, because of the downtime and resources required.But with DB2 9.7, tables, indexes, long data, and large object (LOB) data can easily be moved from one table space to another using the procedure and I'll show you how this procedure can be used to move a table from one table space to another.Ten years ago, if you asked me to model an online dating site with people, answers to questions, freeform essays, etc, I would have built an attractive, normalized structure like this: In fact, back in 2001 I built and launched an early version of Similarity that had a structure almost exactly like this. It requires 3-4 queries just to fetch a single profile.Rendering 50 match results might have required hundreds of queries.It is required to identify duplicate records and remove them from the table.

This chapter will describe how to prevent the occurrence of duplicate records in a table and how to remove the already existing duplicate records.Live Jasmin is one of the largest live sex cam sites available, with amateur performers from all across the globe offering a variety of action and ways to chat.Find the hottest sexy girls live on cam at any moment of the day or night with thousands Live Sex Cam models online at any given moment offered to you by this spectacular sex cam site that will blow your mind.This is part 2 in a series about the architecture of Like a lot of people building websites today, I emerged from the 2000s with a lot of experience building applications using the “traditional web stack”: Some sort of web server that accepts HTTP requests, issues SQL queries to an RDBMS, and returns the results as formatted HTML.Starting in university and proceeding throughout my career, I learned the “correct” way to model data structures and query them with relational algebra. In retrospect, if I ever had real traffic, this schema would not have performed.In fact, if you examine how Facebook has evolved their My SQL system, you will notice they’ve abandoned the relational pretense entirely: Lo and behold, this is almost exactly what No SQL databases like Mongo DB and the Google App Engine datastore are like.

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