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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]
The DUAL table is a special one-row, one-column table present by default in Oracle and other database installations. In Oracle, the table has a single VARCHAR2(1) column called DUMMY that has a value of 'X'. It is suitable for use in selecting a pseudo column such as SYSDATE or USER.
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.
More generally, there are d! possible orders for a given array, one for each permutation of dimensions (with row-major and column-order just 2 special cases), although the lists of stride values are not necessarily permutations of each other, e.g., in the 2-by-3 example above, the strides are (3,1) for row-major and (1,2) for column-major.
Starting with this release the version number of Oracle Forms moving forward would keep in sync with the Oracle database version. As a result, version 8 as skipped, and the version number jumped to 9. After this release, there were very few product changes made besides keeping the version number in sync with the Oracle database.
Oracle Data Guard; Oracle Streams; In Oracle Data Guard primary databases the queue monitor process (often running as qmn0) interacts with AQ. As of Oracle release 9.2, AQ comes bundled with Standard Edition and Enterprise Edition at no extra cost. As of Oracle release 10.1, AQ is integrated into Oracle Streams, and is called "Oracle Streams AQ".
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Various methods of representing the same one to many relationship. In each case, the diagram shows the relationship between a person and a place of birth: each person must have been born at one, and only one, location, but each location may have had zero or more people born at it. Two related entities shown using Crow's Foot notation.