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Reserved words in SQL and related products In SQL:2023 [3] In IBM Db2 13 [4] In Mimer SQL 11.0 [5] In MySQL 8.0 [6] In Oracle Database 23c [7] In PostgreSQL 16 [1] In Microsoft SQL Server 2022 [2]
A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.
Starting from Oracle database 11g, iSqlplus (web based) and sqlplus GUI no longer ship with Oracle database software. [7] The command-line SQL Plus interface continues in use, mostly [ citation needed ] for non-interactive scripting or for administrative purposes.
There may be reserved words which are not keywords. For example, in Java, true and false are reserved words used as Boolean (logical) literals. As another example, in Pascal, div and mod are reserved words used as operators (integer division and remainder). There may also be reserved words which have no defined meaning.
Chinese punctuation – Punctuation used with Chinese characters; Currency symbol – Symbol used to represent a monetary currency's name; Diacritic – Modifier mark added to a letter (accent marks etc.) Hebrew punctuation – Punctuation conventions of the Hebrew language over time; Glossary of mathematical symbols; Japanese punctuation
In comparing Oracle Internet Directory with its competitors, Oracle Corporation stresses that it uses as its foundation an Oracle database; whereas many competing products (such as Oracle Directory Server Enterprise Edition and Novell eDirectory) do not rely on an enterprise-strength relational database, but instead on embedded database engines similar to Berkeley DB.
Oracle Database provides information about all of the tables, views, columns, and procedures in a database. This information about information is known as metadata. [1] It is stored in two locations: data dictionary tables (accessed via built-in views) and a metadata registry.
The purpose of a PL/SQL function is generally used to compute and return a single value. This returned value may be a single scalar value (such as a number, date or character string) or a single collection (such as a nested table or array). User-defined functions supplement the built-in functions provided by Oracle Corporation. [6]