oracle内存表在查询和报表的时候用的比较多,它的速度相对物理表要快几十倍。 simple example:1、table()结合数组:*/create or replace type t_testasobject( id integer, rq date, mc varchar2(60) ); create or replace type t_test_tableastable of t_test; create or replace function f_test_array(ni...
select * fromtable(cast(f_int_date_varchar2() as table_int_date_varchar2)); drop function f_int_date_varchar2; drop type table_int_date_varchar2; drop type type_int_date_varchar2; 2.A Function that returns a table of dates in a Range create or replace type date_obj as object (d...
1. 用游标传递数据利用游标 REF CURSOR 可将数据集(多行记录)传递到PL/SQL函数: SELECT * FROM TABLE (myfunction (CURSOR (SELECT * FROM mytab))); 2. 利用两个实体化视图(或表)作为样板数据CREATE MATERIALIZED VIEW sum_sales_country_mv BUILD IMMEDIATE REFRESH COMPLETE ENABLE QUERY REWRITE AS SELECT...
The interface approach requires the user to supply a type that implements a predefined Oracle interface consisting of start, fetch, and close operations. The type is associated with the table function when the table function is created. During query execution, the fetch method is invoked repeatedly...
Oracle Table Function Oracle Table Function在Oracle9i时引入。完美的兼容了view和存储过程的长处: 应用举例: 1.Table()函数: set feedback off create or replace type type_int_date_varchar2 as object (i integer, d date, v varchar2(99)) /
You cannot run a pipelined table function over a databaselink. The reason is that the return type of a pipelined table functionis a SQL user-defined type, which can be used only in a single database(as explained in OracleDatabase Object-Relational Developer's Guide). Altho...
get a function by name java.lang.ObjectremoveByID(java.lang.String id) Remove a function by id. java.lang.ObjectremoveByName(java.lang.String name) Remove a function by name. Methods inherited from class oracle.rules.sdk.editor.datamodel.ModelComponentTable ...
But with a table function, you can deliver that data immediately to the web page, without any need for nonquery data manipulation language (DML). Emulate a parameterized view. Oracle Database does not support true parameterized views, as in Copy code snippet Copied to Clipboard Error: Could ...
• Table functions are a new feature in Oracle 9i that allow us to define a set of PL/SQL statements that will, when queried, behave just as a regular query to table would. • Table functions are used to return collections that mimic tables. • We can call a Table Function within...
SQL宏特性,允许开发人员将复杂的处理通过宏定义实现,随后可以在 SQL 中任何位置调用宏。这个特性的实现类似于12c中实现的 Function in SQL 特性。 在Oracle Database 20c 中,Oracle 带来了 SQL 的超级增强 - SQL 宏 (SQL Macro)特性。 SQL宏特性,允许开发人员将复杂的处理通过宏定义实现,随后可以在 SQL 中任何...