Learn More
ANSI SQL-92 [MS, ANSI] defines Isolation <i>Levels</i> in terms of <i>phenomena:</i> Dirty Reads, Non-Repeatable Reads, and Phantoms. This paper shows that these phenomena and the ANSI SQL definitions fail to properly characterize several popular isolation levels, including the standard locking implementations of the levels covered. Ambiguity in the(More)
New updated! The latest book from a very famous author finally comes out. Book of understanding the new sql a complete guide, as an amazing reference becomes what you need to get. What's for is this book? Are you still thinking for what the book is? Well, this is what you probably will get. You should have made proper choices for your better life. Book, as(More)
For several years now, you've been hearing and reading about an emerging standard that everybody has been calling SQL3. Intended as a major enhancement of the current second generation SQL standard, commonly called SQL-92 because of the year it was published, SQL3 was originally planned to be issued in about 1996&#8230;but things didn't go as planned. As(More)
Regular readers of this column will have become familiar with database language SQL -- indeed, most readers are already familiar with it. We have also discussed the fact that the SQL standard is being published in multiple parts and have even discussed one of those parts in some detail[l].Another standard, based on SQL and its structured user-defined(More)
SQL:2003 has finally achieved final publication as an International Standard, replacing SQL:1999. SQL:2003 is popularly believed to be largely a “bugfix release” of the SQL standard — except, of course, for the SQL/XML work on which we have previously reported. However, as you will learn from this and future columns, there are many compelling new features(More)
Not very long ago, we discussed the creation of a new part of SQL, XML-Related Specifications (SQL/XML), in this column [1]. At the time, we referred to the work that had been done as "infrastructure". We are pleased to be able to say that significant progress has been made, and SQL/XML [2] is now going out for the first formal stage of processing, Final(More)
Since we last wrote about SQL/XML in [2], the first edition of that new part of the SQL standard has been officially published as an international standard [1], commonly called SQL/XML:2003. At the time of that earlier column, SQL/XML was just entering its first official ballot, meaning that (possibly significant) changes to the text were expected in(More)
Longtime readers of the SIGMOD record will know that this column was most recently written by Len Gallagher of the USA' s National Institute of Standards and Technology (NIST). The nature of Len's job at NIST changed some months ago and his considerable talents are being applied in other areas than de jure standardization activities. His moving on has left(More)