Sql Queries

Some articles on sql, queries, sql queries:

Gadfly (database) - Usage - Features
... At this point Gadfly supports quite a lot of the SQL semantics requested in the ODBC 2.0 specification ... SQL statements supported include the SELECT SELECT expressions or * FROM tables This statement is quite powerful ... Embedded queries supported include subquery expressions, expr IN (subselect), quantified comparisons, and the EXISTS (subselect) predicate ...
Codd's Theorem
... Codd's theorem states that relational algebra and the domain-independent relational calculus queries, two well-known foundational query languages for the ... The domain independent relational calculus queries are precisely those relational calculus queries that are invariant under choosing domains of values beyond those appearing in the database itself ... That is, queries that may return different results for different domains are excluded ...
Perl - Database Interfaces
... facilities are useful for generating SQL queries arrays, hashes, and automatic memory management make it easy to collect and process the returned data ... (API), the arguments to the API can be the text of SQL queries thus it is possible to program in multiple languages at the same time (e.g ... to programmatically customize each of the SQL queries, and the specification of Perl arrays or hashes as the structures to programmatically hold the resulting data sets ...
Drupal - Core - Database Abstraction
... Drupal had functions which performed tasks related to databases, such as SQL query cleansing, multi-site table name prefixing, and generating proper SQL queries ... layer that allowed programmers to create SQL queries without writing SQL ... Drupal 7 extends the data abstraction layer so that a programmer no longer needs to write SQL queries as text strings ...

Famous quotes containing the word queries:

    All I can say, in answer to this kind queries [of friends] is that I have not the distemper called the Plague; but that I have all the plagues of old age, and of a shattered carcase.
    Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)