TYPE nested_table_type IS TABLE OF element_datatype [NOT NULL];Code language:SQL (Structured Query Language)(sql) Then, declare the nested table variable based on a nested table type: nested_table_variable nested_table_type;Code language:SQL (Structured Query Language)(sql) It is possible to...
SELECT /*+NESTED_TABLE_GET_REFS+*/ * FROM COLOR_MODEL_COLORS_TAB; COLUMN_VALUE --- RED GREEN BLUE SQL> Ref: 1.Page 357, Oracle PL/SQL Programming FIFTH EDITION, Steven Feuerstein with Bill Pribyl, O'REILLY 2.http://www.itpub.net/viewthread.php?tid=640129...
PL/SQL Nested Table Using Initialized Values To get started using a Nested Table, create a code block that declares a nested table type and instantiates a nested table of this created type (Lines 2 & 4). This code iterates through a FOR Loop 3 times to show that the Nested Table has ...
netsted tables 可以看成一个变长数组,可以存放任意数量的元素(只要内存足够大),通过下标来实现对元素的访问,nested tables 有点是可以在SQL中直接使用。 nested table 内存存储模型 nested tables 为了提高删除元素的效率,元素删除后并不移动后续的元素,从图中可以看nested tables 的下标是从1开始的,这点跟其它语言...
The CREATE TYPE (Nested table) statement defines an associative array indexed by INTEGER data type. Invocation This statement can be executed from the DB2® command line processor (CLP), any supported interactive SQL interface, an application, or a routine. ...
PLSQL collection 示例 之 Nested Tables,CREATETABLEPerson(Idint,Namevarchar(255));BEGINFORiIN1..4LOOPinsertintopersonvalues(i,’abc’||i);ENDLOOP;commit;END;DECLARECURSORcursor_personisSELECTnameFRO
OraclePLSQL 之嵌套表（NestedTable ）Test Code:Connected to Oracle Database 11g Enterprise Edition Release color_model_colors_tab 6 / Table created SQL> SQL> BEGIN 2 INSERT INTO color_models 3 VALUES ('RGB', color_tab_t ('RED','GREEN','BLUE'));4 END;5 / PL/SQL procedure ...
集合是Oracle开发中经常遇到的情况,Oracle集合分为三种情况:索引表集合(index by table)、嵌套表集合(nested table)、可变集合(varry table)。 PL/SQL中没有数组的概念,他的集合数据类型和数组是相似的。 其中varray table的元素是有数量限制的,index_by table和nexted table是没有这个限制的。
PL/SQL的复合型变量主要包括两类: 1. Records:记录 2. Collection:集合。Collection又可以分为三种, a. Associative Array(INDEXTBY table):关联数组(或称索引表,和SQL中的INDEX OF TABLE不是一个概念) b. Nested Table:嵌套表 c. Varray:可变长度列表。
)NESTED TABLE projects STORE AS projects_nested_table;创建新的对象类型 Create type 类型名称 AS OBJECT(列名称数据类型，列名称数据类型，……列名称数据类型 );/ 范例：创建⼀个表⽰项⽬类型的对象 Create or replace type kingsql_type as object(Projectid number,Projectname varchar(50),Projectfunds...