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    Database Technology: Nulls Considered Harmful by Chris Date Paperback Book

    • Item No : 395944036564
    • Condition : Brand New
    • Brand : No brand Info
    • Seller : grandeagleretail
    • Current Bid : US $56.93

    • * Item Description

    • In fact, Codd himself subsequently extended his original model to support 3VL and nulls as well. (Actually, basing SQL on 3VL and adding 3VL to the relational model seem to have occurred in lockstep, as it were. ).
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