Then we created a process that did exactly the same, using the Case-When statement. We can see from the waveform that the output signals from the two processes, Output1 and Output2, behave exactly the same. In our example, the Sel signal has only four legal values. But if there had ...
CASE<WHEN表达式THEN语句ELSEstatementsENDCASE 在简单方式下,先求值主表达式。 依次对每个 WHEN 子句表达式求值,直到结果等于主表达式的结果。 然后将处理该 WHEN 子句的语句。 如果未找到匹配且存在可选的 ELSE 子句,将改为执行 ELSE 子句的语句。 测试值不必是文字。 唯一的要求是主表达式和 WHEN 子句表达式求值得...
Insert statement with CASE in SQL You can use the CASE expression to insert data into a SQL Server table. The INSERT statement with CASE will scan for the required values and if found, insert values from THEN expression. INSERT INTO column_name VALUES (CASE expression WHEN condition1 THEN re...
'Gray' vs. 'Grey': What is the difference? What's the difference between 'fascism' and 'socialism'? More Commonly Misspelled Words Popular in Wordplay See All Terroir, Oenophile, & Magnum: Ten Words About Wine 8 Words with Fascinating Histories ...
原SQL如下:SQL的主要问题是红色部分居然通过标量查询,反复的查找与SQL相同的基表,很显然这个可以用case when来简化。 select a.TRAN_ID, a.AMOUNT, a.BALANCE, a.INVAMT, a.PROMISED, a.INVNO, a.RCLNUM, b.PROBLEM_ID, a.TRANTYPE, a.TYPE, ...
statement 指定一个或多个 SQL 或 PL/SQL 语句,每个语句都以分号终止。 ELSE 此关键字引入 CASE 语句的缺省情况。 示例 以下示例使用搜索型 CASE 语句将部门名称和地点指定给基于部门编号的变量。 DECLARE v_empno emp.empno%TYPE; v_ename emp.ename%TYPE; v_deptno emp.deptno%TYPE; v_dname dept.dname%...
CASE表达式是用来判断条件的,条件成立时返回某个值,条件不成立时返回另一个值。 语法: CASE WHEN ComparsionCondition THEN result WHEN ComparsionCondition THEN result ELSE other END (注:各分支返回的数据
6. a statement of facts and reasons used to support an argument; "he stated hiscaseclearly" 7. a portable container for carrying several objects; "the musicians left their instrumentcasesbackstage" 8. a person who is subjected to experimental or other observational procedures; someone who is an...
When we write a case statement in SystemVerilog we specify an input signal to monitor and evaluate. The value of this signal is then compared with the values specified in each branch of the case statement. Once a match is found for the input signal value, the branch associated with that ...
shardingsphere version:4.1.1 mybatis sql as follow: SELECT id, (CASE WHEN LENGTH(TRIM(name_en))]]>0 THEN CONCAT(name_cn,'-',name_en) ELSE name_cn END) AS text,account_no FROM user WHERE status=1 xxxx debug screenshot exception: line 3:25...