Extensions to SQL for historical databases

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

SQL Extensions for Security Assertions

We describe the extensions to the relational query language SQL that are necessary to support multilevel security in database management systems. In a multilevel secure database with data at a variety of sensitivity levels. The data classifications are provided by security assertions. Consequently, the data definition language and the data manipulat ion language should provide support for incor...

متن کامل

Introducing Custom Language Extensions to SQL: 1999

Even though SQL has become widely accepted as a language for implementing relational database schemas and querying data, there are cases where its users experience the need for new language abstractions which would allow them to express data modeling and querying solutions in a clearer and simpler manner. This paper describes the idea of language extensions to SQL:1999 that come in form of inde...

متن کامل

SQL for NoSQL Databases: Déjà Vu

Existing relational database technology experience tells us that declarative database query languages are beneficial for different reasons, including application independence from access path considerations and decades of sophisticated query optimization technologies [2]. In context of most NoSQL databases, however, users are forced to implement complex query algorithms manually themselves usin...

متن کامل

Algebra-to-SQL Query Translation for Spatio-Temporal Databases

Although many spatio-temporal conceptual models has been proposed in the last years, users must express their queries on the underlying physical data structures. In the context of the European project MurMur we developed a Query Editor tool that allows the creation of queries visually from the conceptual schema as well as the visualization of the query result. In this paper we describe the Quer...

متن کامل

Social SQL: Tools for Exploring Social Databases

Social media are constructed from the collective contributions of potentially millions of individuals and present an increasingly common and large scale form of database. As these databases grow in social and technical importance exploration of their structure is needed. The social nature of much of this data is an added opportunity and challenge, providing contributions to social science quest...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: IEEE Transactions on Knowledge and Data Engineering

سال: 1990

ISSN: 1041-4347

DOI: 10.1109/69.54721