By The Open Group
This rfile specifies the applying programming interface (API) for Open Group-compliant relational database administration platforms. it really is heavily in response to the overseas ordinary for the Database Language (SQL), ISO 9075:1992, and encompasses the gains often called 'Transitional SQL' in NIST FIPS 127-2. moreover, it defines a few extensions to the foreign ordinary in response to present implementations.
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Extra resources for Data Management: Structured Query Language (SQL), Version 2
A cursor relates to a specific table and its name need only be unique within that table. 3 Database System Character Sets Every character string has a character set. A character set is a named object. The most significant aspect of the character set to the user of SQL is that it defines a repertoire of characters that can be used to form a string. Different character sets allow use of SQL to represent data in different human languages. Along with the repertoire, a character set also defines a form-of-use (see the Glossary) and an encoding (which octet values represent each character).
A data type restricts the contents or representation of a value. There are four generic data types: character string, date/time, interval and numeric. Non-null values within a generic data type can be assigned to one another and compared to one another. Generally, values cannot be assigned to or compared with values of another generic data type. 6 on page 65). Within each generic data type, there are a variety of named data types. A named data type has specific characteristics and SQL syntax. The application identifies a named data type using an SQL keyword and, for some named data types, may specify additional attributes such as length and precision.
A row is the smallest unit of data that can be inserted into a table and deleted from a table. A table has a specification, which includes a specification of each of its columns. Every row of a table has the same cardinality and contains a value of every column of that table. The ith value in every row of a table is a value of the ith column of that table. The degree of a table is its number of columns, which is the cardinality of each row. The cardinality of the table is its number of rows, which is the cardinality of each column.