Oracle PL/SQL 中if语句的应用 一 语法 1、形式1 2、形式2 3、形式3 二 实例 /* 判断从用户从键盘输入的数字 1、如何使用if语句 2、接受一个键盘输入(字符串) */ set serveroutput on --接受一个键盘输入 accept num prompt '请输入一个数字' --num:地址值,含义是:在该地址保存了输入的值 declare ...
If, ElseIf, and Else The If, ElseIf, and Else tags enable you to define the conditions under which to execute a set of directives. Like the Client tag, these tags can only appear inside an Object tag. In addition, these tags can evaluate an expression, then conditionally execute one or...
This Oracle tutorial explains how to use the IF-THEN-ELSE statement in Oracle with syntax and examples. In Oracle, the IF-THEN-ELSE statement is used to execute code when a condition is TRUE, or execute different code if the condition evaluates to FALSE.
1道Oracle题目。选什么?为什么?{Oracle题目} 判断 IF 语句: IF v_num > 5 THEN v_example := 1; ELSIF v_num > 10 THEN v_example := 2; ELSIF v_num < 20 THEN v_example := 3; ELSIF v_num < 39 THEN v_example := 4; ELSE v_example := 5; END I
{Oracle题目} 判断 IF 语句: IF v_num > 5 THEN v_example := 1; ELSIF v_num > 10 THEN v_example := 2; ELSIF v_num < 20 THEN v_example := 3; ELSIF v_num < 39 THEN v_example := 4; ELSE v_example := 5; END IF; 如果V_NUM 是 37, 什么值将被赋值给 V_EXAMPLE? (...
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In other words, an ELSE clause is not required in the ELSIF construct. Consider the following example:For ExampleDECLARE v_num NUMBER := &sv_num; BEGIN IF v_num < 0 THEN DBMS_OUTPUT.PUT_LINE (v_num||' is a negative number'); ELSIF v_num > 0 THEN DBMS_OUTPUT.PUT_LINE (v_num...
But there does not appear to be a reason to use PL/SQL when you could simply use SQL:...
The if-then and if-then-else Statements Theif-thenStatement Theif-thenstatement is the most basic of all the control flow statements. It tells your program to execute a certain section of codeonly ifa particular test evaluates totrue. For example, theBicycleclass could allow the brakes to de...
oracle中 plsql中 IF ... THEN ... ELSE ... 及其嵌套使用的例子,程序员大本营,技术文章内容聚合第一站。