1 CREATE OR REPLACE PROCEDURE 存储过程名 2 IS 3 BEGIN 4 NULL; 5 END; 行1: CREATE OR REPLACE PROCEDURE 是一个SQL语句通知Oracle数据库去创建一个叫做skeleton存储过程, 如果存在就覆盖它; 行2: IS关键词表明后面将跟随一个PL/SQL体。 行3: BEGIN关键词表明PL/SQL体的开始。 行4: NULL PL/SQL语句...
下面是一个使用IF-ELSE语句的示例: DELIMITER // CREATE FUNCTION calculate_discount_price(in_price DECIMAL(8,2)) RETURNS DECIMAL(8,2) BEGIN DECLARE discount DECIMAL(8,2); IF in_price > 1000 THEN SET discount = in_price * 0.9; ELSEIF in_price > 500 THEN SET discount = in_price * 0.95...
CREATE PROCEDURE 存储过程名称 ([ IN/OUT/INOUT 参数名 参数类型 ]) BEGIN -- SQL语句 END ;案例案例一根据传入参数score,判定当前分数对应的分数等级,并返回。score >= 85分,等级为优秀。 score >= 60分 且 score < 85分,等级为及格。 score < 60分,等级为不及格。
create procedure p3() begin declare score int default 58; declare result varchar(10); if score >= 85 then set result :='优秀'; else if score >= 60 then set result :='及格'; else set result :='不及格' end if; end; call p3(); 二.存储过程参数(IN,OUT,INOUT) 1.(IN,OUT,INOUT...
写一个WHILE循环,用来动态拼接部分SQL(关联条件部分)。 代码语言:javascript 复制 CREATE OR REPLACE PROCEDURE TEST AS --待拼接的字段 STR VARCHAR2(128); --逗号数量,用于循环 SIGNS INT; --逗号数量最大值,用于判断是否加AND SI_MAX INT; --当前循环取到的值 CURRENT_VALUE VARCHAR2(32); --存放计算值...
AnIF...ELSEconstruct can be used in batches, in stored procedures, and in ad hoc queries. When this construct is used in a stored procedure, it's usually to test for the existence of some parameter. IFtests can be nested after anotherIFor following anELSE. The limit to the number of...
sql DELIMITER // CREATE PROCEDURE CheckAge(IN person_age INT)BEGIN IF person_age < 18 THEN SELECT 'You are not old enough to vote.';ELSE SELECT 'You are old enough to vote.';END IF;END // DELIMITER ;在这个示例中，我们创建了一个名为CheckAge的存储过程，它接受一个整数参数...
elseif SQL语句endif;createproceduretest1(numberint)beginifnumber>10thenselectuser();elseselect'please input a number > 10';endif;end$ mysql>createproceduretest1(->numberint->)->begin->ifnumber>10then->selectuser();->else->select'please input a number > 10';->endif;->end$ ...
dropPROCEDUREif EXISTS proc4; createPROCEDUREproc4(inageint,outtempvarchar(20)) BEGIN -- DECLARE age int DEFAULT 22; -- DECLARE temp VARCHAR(20); if age<=25then settemp:='初级'; ELSEIF age<=40THEN settemp='中级'; elsesettemp:='高级'; ...
I try to use stored procedured first time in my project. So I have syntax error if I try to use "if","else". If NewProductId equals "0" or null, I do not want to update. else I want to update my NewProductId ALTER PROCEDURE MyProcedured ( @CustomerId INT, @CustomerName VARCH...