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mysql iF thEn ElsE

sql server 中不是这样的。。。 是 if() begin [代码] end else begin [代码] end

(1)数字 如果 Measures.CurrentMember 是空单元,则下面的示例返回 0,否则返回 1 IIf(IsEmpty(Measures.CurrentMember), 0, 1) (2)字符串 如果Measures.CurrentMember 是空单元,则下面的字符串返回字符串"Yes",否则返回字符串"No" IIf(IsEmpt...

MySql 查询不支持if else流程控制,但是可以使用case函数来实现相同流程控制功能。 下面举例供参考: 根据考生分数判定是否合格 select sid,grade, case when grade

mysql> DELIMITER //mysql> CREATE PROCEDURE TestIfElse -> ( -> p_val INT -> ) -> BEGIN -> IF (p_val = 1) THEN -> SELECT '1' AS A; -> ELSEIF (p_val = 2) THEN -> SELECT '2' AS A; -> ELSE -> SELECT 'other' AS A; -> END IF; -> END//...

mysql> DELIMITER // mysql> CREATE PROCEDURE TestIfElse -> ( -> p_val INT -> ) -> BEGIN -> IF (p_val = 1) THEN -> SELECT '1' AS A; -> ELSEIF (p_val = 2) THEN -> SELECT '2' AS A; -> ELSE -> SELECT 'other' AS A; -> END IF; -> END/...

--在5.1.55中运行没问题--另外没有show version,只有select version();--你拷贝下面的代码试试?create procedure `test2`(IN cusername VARCHAR(50),IN cpassword VARCHAR(50),IN clastloginio VARCHAR(50))BEGINif exists(select * from mt_u...

mysql 里面, 变量不需要加 @ 这个符号的呀 mysql> DELIMITER //mysql> CREATE PROCEDURE TestIfElse -> ( -> p_val INT -> ) -> BEGIN -> IF (p_val = 1) THEN -> SELECT '1' AS A; -> ELSEIF (p_val = 2) THEN -> SELECT '2' AS A; -> ELSE ->...

delete from xxx; 修改为 delete from 被触发的表; 由于 MySQL 没有直接抛出异常的语句因此这里通过在触发器里面,插入/删除自己这个表导致 MySQL 发生异常 下面是一个例子代码: 触发器实现数据完整性的处理1-- 货物表CREATE TABLE Goods( id I...

你可以试一下先输入select 'printSEQ' from 'policyexpress' where policyno='000000600326 ' into '@cnt'; 再输入if '@cnt' ='' then update policyexpress set printSEQ = '212121212' where policyno = '000000600326'; end if

sum(case when 分数60...

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