the dynamic PL/SQL block is an anonymous PL/SQL block that invokes a subprogram that has a formal parameter of the PL/SQL (but not SQL) data type RECORD. The record type is declared in a package specification,
This chapter shows you how to use dynamic SQL, an advanced programming technique that adds flexibility and functionality to your applications. After weighing the advantages and disadvantages of dynamic SQL, you learn four methods--from simple to complex--for writing programs that accept and process ...
This example illustrates how you can create and use dynamic cursor in Oracle PL/SQL. The example is pretty simple, but I hope you can get the idea and apply it to more complicated cases. DECLARE t_cursorISREF CURSOR; my_cursor t_cursor; v_customer RECORD(customer_id NUMBER(18),amount ...
静态SQL: 在PL/SQL块中使用的SQL语句在编译时是明确的,执行的是确定对象。 动态SQL: 在PL/SQL块编译时SQL语句是不确定的,如根据用户输入的参数的不同而执行不同的操作。 1、跟据动态条件获得数据集 /*定义游标*/ TYPE App_CUR IS REF CURSOR; /*定义存储过程*/ PROCEDURE sp_QueryAppName(p_where1 VARC...
Ever since Oracle Version 7.1, we PL/SQL developers have been able to use the built-in DBMS_SQL package to execute dynamic SQL. In Oracle8i, we were given a second option ... Get Oracle PL/SQL Programming, Third Edition now with the O’Reilly learning platform. O’Reilly members experie...
在Oracle中,什么是动态采样(Dynamic Sampling)? ♣ 答案部分 对于没有收集统计信息的表,Oracle为了能够得到相对准确的执行计划,会在执行SQL之前对SQL语句涉及到的表做动态采样(Dynamic Sampling,从Oracle 11.2.0.4开始称之为Dynamic Statistic)。 有两种方法可以开启动态采样: ...
Examples Execute a SQL SELECT query with the table name as a dynamic variable using bind variables. This query returns the number of employees under a manager with a specific ID. DO $$DECLARE Tabname varchar(30) := 'employees'; num integer := 1; cnt integer; BEGIN EXECUTE f...
Improved conversion of cursors created from dynamic SQL string Update ODP.NET to v19.8 SSMA v8.11 The v8.11 release of SSMA for Oracle contains the following changes: Support for subqueries inINSERT ... VALUESstatement Improved conversion ofCOMMITstatement ...
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Support SAAS complete application: cross-database query, audit, tenant sub-database, tenant sub-table and tenant data isolation Support low code + workflow (dynamic class building, dynamic table building, non-entity multi-library compatible with CRUD, JSON TO SQL, custom XML, etc.) ...