Database Language SQL — Part 2 : Foundation ( SQL / Foundation ) « Part 2 » September 1999
ثبت نشده
چکیده
منابع مشابه
SQL : 1999 , formerly known as SQL 3 Andrew
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...but things didn’t go as planned. As you may be aware, SQL3 has been characterize...
متن کاملSQL/XML and the SQLX Informal Group of Companies
For many years now, the SQL standard has been maintained and enhanced by NCITS Technical Committee H2 on Database in the US and by the ISO/IEC JTC 1/SC32/WG3 Database Languages Working Group internationally. After the publication of SQL:1992, the groups began to publish SQL as a base document (SQL/Foundation) and a number of independent parts. These parts began with SQL/CLI (Call-Level Interfac...
متن کاملThe Algebra and the Logic for SQL Nulls
The logic of nulls in databases has been subject of investigation since their introduction in Codd’s Relational Model, which is the foundation of the SQL standard. In the logic based approaches to modelling relational databases proposed so far, nulls are considered as representing unknown values. Such existential semantics fails to capture the behaviour of the SQL standard. We show that, accord...
متن کاملApplication of a Hardware Synthesis Technique for Database Query Optimization
*This work was supported in part by a Research Initiation Award from Mississippi State University, the National Science Foundation under grant INT-0096008 and the DaaD under grant 315/PPP/gü-ab. ABSTRACT The size of a typical modern Database is on the order of hundreds of Gigabytes (GB) and the need for developing systems for processing such huge amounts of data has emerged. A highly efficient ...
متن کاملPractical Querying of Temporal Data via OWL 2 QL and SQL: 2011
We develop a practical approach to querying temporal data stored in temporal SQL:2011 databases through the semantic layer of OWL 2 QL ontologies. An interval-based temporal query language (TQL), which we propose for this task, is defined via naturally characterizable combinations of temporal logic with conjunctive queries. This foundation warrants well-defined semantics and formal properties o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999