问Oracle SQL嵌套case with SELECT returns单行子查询返回多行EN这两种方式，可以实现相同的功能。简单Cas...
DECODE is considered the most powerful function in Oracle. Oracle 8i release introduced the CASE expression. The CASE expression can do all that DECODE does plus lot of other things including IF-THEN analysis, use of any comparison operator and checking multiple conditions, all in a SQL query i...
SQL>show userUSER为"HR"SQL>SELECTfirst_name,last_name,department_id,2CASEdepartment_id3WHEN10THEN'Accounting'4WHEN20THEN'Sales'5WHEN30THEN'Finance'6ELSE'Other'7ENDdepartment_name8FROMemployees where rownum<2;FIRST_NAMELAST_NAMEDEPARTMENT_IDDEPARTMENT_NAME---Steven King90OtherSQL> ※测试使用的Orac...
搜索式的CASE语句没有选择器(可以这么说,因为它产生的是BOOLEN类型的搜索条件,那我们就给他一个函数表达式例如MOD(V_NUM,2)=0判断是TRUE FALSE OR NULL,而CASE语句需要把选择器传入,解释:(V_MUM_FLAG := MOD(V_NUM,2),所以你要在CASE 后面添加V_MUM_FLAG这个选择器 然后判断选择器0(when 0 THEN) CASE...
It would be better to list and check it once, like a simple case expression. FromOracle Database 23aiyou can get the “best of both” with extended case controls. These enable you to: List and evaluate the selector once Compare it using all SQL conditions ...
Oracle中Case语句中的Select语句 sql oracle oracle-sqldeveloper SELECT (CASE WHEN T.ID = ( SELECT cte.REFERENCE FROM trans cte WHERE T.ID = CTE.PARENT_ID) THEN cte.REFERENCE ELSE null END) AS name FROM trans T 示例:我选择一个事务值作为示例。在ID=1的trans表中,然后在同一个表中我需要...
sql oracle case 我有一个基本问题,当你的用例有多个值时,我可以使用OR,但我总是要重复列的名称=或者有一个更简单的解决方案,请参阅下面的电话号码示例。谢谢你的建议。 -- Channel Dial CASE WHEN FIS.TARGET_ADDRESS = '+3222011111' OR FIS.TARGET_ADDRESS = '+3222018181' THEN 'BCC' WHEN FIS.TARGET...
哦,好吧!是不是感觉很麻烦,下面我用with语句来写SQL语句: with e as ( select deptno dno,max(sal) max_sal from emp group by deptno) select m.empno,m.ename,m.sal,m.hiredate,d.deptno,d.dname from e,emp m,dept d where e.dno=m.deptno and m.deptno=d.deptno and e.max_sal=m.sal ...
如果使用Case函数,SQL代码如下: SELECT SUM(population), 1. CASE country 1. WHEN '中国' THEN '亚洲' 1. WHEN '印度' THEN '亚洲' 1. WHEN '日本' THEN '亚洲' 1. WHEN '美国' THEN '北美洲' 1. WHEN '加拿大' THEN '北美洲' 1.
oracle sql - 选择具有多个“case when”的语句并检查是否包含文本 社区维基1 发布于 2022-10-21 新手上路,请多包涵 我寻找一个工作示例,当案例陈述检查是否包含特定文本时,我可以使用 mutliple:例如 SELECT ID, NAME, (SELECT (Case when Contains(Descr,"Test") Then "contains Test" when Contains(Descr, ...