By The Open Group
This rfile specifies the applying programming interface (API) for Open Group-compliant relational database administration structures. it truly is heavily according to the overseas usual for the Database Language (SQL), ISO 9075:1992, and encompasses the positive factors often called 'Transitional SQL' in NIST FIPS 127-2. additionally, it defines a few extensions to the overseas normal in response to present implementations.
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Additional resources for Data Management: Structured Query Language (SQL), Version 2
In these tokens, a lower-case letter is equivalent to the corresponding upper-case letter. 4 on page 48, and host identifiers in Chapter 4; user-defined names and keywords are described below. User-defined Names A user-defined name is a non-delimiter token that is selected by the writer of the embedded SQL program as a name. The types of objects that can be named are listed in Types of User-defined Name on page 34. 10 Any subsequent character of a userdefined name must be a letter, a digit or the underscore character.
The technical terms for these language elements are non-delimiter tokens, delimiter tokens, and separators, respectively. These technical terms are defined below. SQL Character Set By default, an embedded SQL program is composed of characters from a character set called the SQL character set. ) All X/Open-compliant implementations support the SQL character set. It contains at least the 26 English upper-case letters, the 26 English lower-case letters, the 10 decimal digits, a blank character, a newline indication, and the following symbols required by the SQL language: , ( ) < > .
Metadata comprises the definitions of all active base tables, viewed tables, indexes, privileges and user names. (An item of metadata is active if it has been defined and has not subsequently been dropped. ) • Data comprises every value in every active table. 3 on page 17) Translations (see TRANSLATE on page 62) A schema may contain base tables, and contains any indexes that are defined on the base tables. A schema has a separate namespace for each class of object; that is, the name of every such object in the schema must be unique.