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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]
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]
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.
Date Terminal Version Marquee Features Oracle Database 23ai: 23.4.0 On May 2, 2024, Oracle Database 23ai [10] was released on Oracle Cloud Infrastructure (OCI) as cloud services, including OCI Exadata Database Service, OCI Exadata Database Cloud@Customer, and OCI Base Database Service. It is also available in Always Free Autonomous Database.
The current system date / time of the database server can be called by using functions like CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIME, or LOCALTIMESTAMP. (Popular vendor specific functions are TO_DATE, TO_TIME, TO_TIMESTAMP, YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, DAYOFYEAR, DAYOFMONTH and DAYOFWEEK.) Interval (datetime)
Oracle SQL Developer versions [11] Version Release Date Description Releases prior to 1.0 Prior to version 1.0, Oracle Corporation labeled the product "Raptor" 1.0 March 2006 The first release 1.1 December 2006 1.2.1 August 2007 1.5 April 2008 1.5.1 June 2008 1.5.3 December 2008 1.5.4 March 2009 1.5.5 July 2009 2.1 RC1 December 2009 2.1 Patch 1
CURDATE() or CURRENT DATE CURTIME() or CURRENT TIME GETDATE() or GETUTCDATE() NOW() or CURRENT TIMESTAMP SYSDATE() 3 ms 1 January 1753 to 31 December 9999 (*) 60 s 1 January 1900 to 6 June 2079 Standard ML: Time.now() 1 μs (*) 1 January 1970 (*) TCL [clock seconds] 1 s 1 January 1970 [clock milliseconds] 1 ms [clock microseconds] 1 μs [clock ...
The following is an Oracle syntax example of a row level trigger that is called AFTER an update FOR EACH ROW affected. This trigger is called on an update to a phone book database. When the trigger is called it adds an entry into a separate table named phone_book_audit.