Database Language

Multidisciplined professionals Extensive databases Language fluency... 

Given that text/plain and application/octet-stream messages can carry information in arbitrary languages and that database languages exist, HTTP networks have the ability to support distributed information systems. This is very useful. 

Data query languages (DQLs) or simply query languages (QLs) are used to write queries and reports. Of course, it is possible to combine a DDL, DML, and DQL into a single database language. 

The SQL RDBMS language has become the American National Standards Institute (ANSI) standard database language. Applications written in ANSI SQL should now be transportable to other RDBMS s that support that language. This is both because of... 

Database Language - SQL Technical Committee on Database, X3H2 American National Standards Institute, New York, 1986. 

A DBMS must support one or more languages with which application developers can set up, populate, scrutinize, and maintain data. In principle, different purposes are best served by different database languages, but in practice, DBMSs tend to use one language to cater for more than one purpose. 

The kinds of database languages that must in principle be supported in DBMSs are ... 

The proposed standard for object-relational database languages is SQL-99. Figure 14 shows how Fig. 4 could be specified in SQL-99. Note the use of ROW TYPE to specify a complex domain, the use of REF to denote tuple identifiers and the use of type constructors such as SET and LIST. Note also that, unlike ODL (cf. Fig. 12), in SQL-99 inverse relationships are not declared. Note, finally, how gene is modeled as including operations, as indicated by the keyword FUNCTION introducing the behavioral part of the specification of gene. 

Searching online databases is effected by means of particular database languages, so-called retrieval languages. They are commands for access to database, search, display of documents and logoff Each database supplier host -has its own language. 

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