SQL> SQL> SQL> -- A function block. SQL> SET SERVEROUTPUT ON SQL> DECLARE 2 temp NUMBER; 3 4 FUNCTION iifn(boolean_expression IN BOOLEAN, 5 true_number IN NUMBER, 6 false_number IN NUMBER) 7 RETURN NUMBER IS 8 BEGIN 9 IF boolean_expression THEN 10 RETURN true_number; 11 ELSIF NO...
call命令调用函数把结果传给绑定变量, 函数初始化:call function(参数列表) into :绑定变量1 存储过程初始化:exec pro_name(var_name=>:绑定变量); 三、declare--声明部分 plsql程序块的声明部分,内部变量,只在当前程序块有效。常量、变量、游标的声明都在declare部分。 Oracle定义变量的方式有3种: 声明并使用变...
DBMS_OUTPUT.put_line('请输入雇员编号:') ; v_eno := &empno ; -- 由键盘输入雇员编号 SELECT ename INTO v_ename FROM emp WHERE empno= v_eno ; DBMS_OUTPUT.put_line('编号为:' || v_eno || '雇员的名字为:'|| v_ename) ; END ; / 运行:输入empno的值:7369 输出结果:编号为:7369雇员...
Enter a description in the box labeled Description to indicate the purpose or function of the Table Map. This field is optional. Column Map ID For any pair of tables in the Table Map, you can specify a Column Map to map columns with unlike names or exclude columns from the comparison. ...
You use theAccess Definition Editorto create and edit access definitions. In theDescriptionbox, you can enter the purpose or function of the access definition. For this scenario, typeArchive orders older than two years. Select the tables
I've seen that a type "SYSUDTLIB.array_strings" exists, but I have problems with it (I can't declare an instance inside the procedure/function; if I do it outside, I have problems of UDTUSAGE access; etc...). Any help with it?
Describe the role of encryption in ensuring confidentiality.How does a DBMS provide data security?What are the three pillars of information security?What is an information security threat?Describe some of the cyber security implications related to the application layer. 1. What is the m...
使用函数定义包标题和正文Created: November-22, 2018 在这个例子中,我们定义了一个包头和一个包含一个函数的包体。 之后我们从包中返回一个返回返回值的函数。 包头: CREATE OR REPLACE PACKAGE SkyPkg AS FUNCTION GetSkyColour(vPlanet IN VARCHAR2) RETURN VARCHAR2; END; / 包装体: CREATE OR REPLACE ...