1. OBJECTIVE Them has been cxtensivc work in query optimization since the enrly '70s. It is
hard to capture the breadth and depth of this large body of work in a short article. Therefore, I …

These methods are presented in the framework of a general query evaluation procedure
using the relational calculus representation of queries. In addition, nonstandard query …

• Bases de datos relacionales (Capítulos 4 al 7). El Capítulo 4 se centra en el lenguaje
relacional orientado al usuario de mayor influencia: SQL. El Capítulo 5 cubre otros dos …

Few database query optimizer models have been validated against actual performance.
This paper presents the methodology and results of a thorough validation of the optimizer …

The problem of allocating the data of a database to the sites of a communication network is
investigated. This problem deviates from the well-known file allocation problem in several …

A statistical profile summarizes the instances of a database. It describes aspects such as the
number of tuples, the number of values, the distribution of values, the correlation between …

The decreasing cost of computing makes it economically viable to reduce the response time
of decision support queries by using parallel execution to exploit inexpensive resources …

Apache Hive is an open-source relational database system for analytic big-data workloads.
In this paper we describe the key innovations on the journey from batch tool to fully fledged …

The assembly flowshop scheduling problem has been addressed recently in the literature.
There are many problems that can be modeled as assembly flowshop scheduling problems …

In this paper, various techniques for optimizing queries in distributed databases are
presented. Although no attempt is made to cover all proposed algorithms on this topic, quite …