Summary: in this tutorial, you will learn how to use MySQL CASE statements to construct complex conditional statements inside stored programs. Besides the IF statement, MySQL provides an alternative conditional statement called the CASEstatement. The CASE statement makes the code more readable and ...
The CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END. For the first syntax, case_value is an expression. This value is compared to the when_value expression in each WHEN clause until one of them is equal. When an equal when_value is ...
The CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END. For the first syntax, case_value is an expression. This value is compared to the when_value expression in each WHEN clause until one of them is equal. When an equal when_value is ...
Summary: in this tutorial, you will learn how to use MySQL CASE statements to construct complex conditionals. Besides the IF statement, MySQL also provides an alternative conditional statement called MySQL CASE. The MySQL CASE statement makes the code more readable and efficient. There are two ...
1 row in set (0.00 sec) I'd hardly call mysql a newbie to MySQL, but I just don't get this. If anyone can shed a light on this, please do. With kind regards, D. P.S.: I checked all queries on both cli and MySQL Workbench. ...
Mysql中的条件语句if、case Mysql中的条件语句在我们对数据进行转换的时候比较有用,这样就不需要创建中转表。...= "" IF ELSE 流程控制语句在mysql存储过程中的用法: IF search_condition THEN statement_list [ELSEIF search_condition...[ELSE statement_list] END IF IF作为一条语句,在END IF后需要加上分号...
1回答 如何在mySQL中将IF语句放在Case表达式中?我正在做一个家庭作业问题,我必须在case语句中放一个IF语句。我在网上找不到任何解释如何做到这一点的东西。我想我有错误的语法。vendor_state, vendor_city into v_state, v_city /*Start a CASE statement using the sta ...
if实现条件判断,满足不同条件执行不同的操作,这个我们只要学编程的都知道if的作用了,下面我们来看看mysql 存储过程中的if是如何使用的吧。 IF search_condition THEN statement_list[ELSEIF search_condition THEN]statement_list...[ELSE statement_list]ENDIF ...
[ELSE statement_list] END CASE;案例根据传入的月份,判定月份所属的季节(要求采用case结构)。1-3月份,为第一季度 4-6月份,为第二季度 7-9月份,为第三季度 10-12月份,为第四季度create procedure p(in month int) begin declare result varchar(10); case when month >= 1 and month <= 3 then set...
IN id varchar(10) , IN n_str varchar(30) , IN v_str varchar(30) ) BEGIN CASE n_str WHEN n_str = 'profileStatus' THEN UPDATE tbl_contact SET status = 'A' WHERE id = id; -- The above statement updates the entire table instead of the right row ...