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5 paź 2018 · Used for a variety of tasks, such as querying data, controlling access to the database and its objects, guaranteeing database consistency, updating rows in a table, and creating, replacing, altering and dropping objects, SQL lets users work with data at the logical level.
The SQL:2003 standard makes minor modifications to all parts of SQL:1999 (also known as SQL3), and officially introduces a few new features such as: [1] XML -related features (SQL/XML) Window functions. the sequence generator, which allows standardized sequences.
The SQL standard precisely specifies the syntax that a conforming database system must implement. However, the standard's specification of the semantics of language constructs is less well-defined, leading to ambiguity.
26 sie 2024 · SQL3, also known as SQL:1999, is a query language standard for relational databases. It introduces advanced features such as user-defined data types, objects, temporary tables, and recursive queries, enhancing data management and analysis capabilities.
The emerging new generation of the SQL Standard, called SQL3, have been under development by ANSI X3H2 and ISO/lEC. JTC 1/SC2 1 over the last d years.
8 gru 2020 · SQL:1999. SQL:1999 (also called SQL 3) was the fourth revision of the SQL standard. Starting with this version, the standard name used a colon instead of a hyphen to be consistent with the names of other ISO standards. This standard was published in multiple installments between 1999 and 2002.
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.
