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...
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...
3. CASE语句和搜索式CASE语句之间的差别 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...
问在Oracle SQL查询中使用嵌套case条件的问题EN这两种方式，可以实现相同的功能。简单Case函数的写法相对...
select sum(COLUMN1) from TABLE1 t1 where TRUNC(INPUT_DATE) >= CASE WHEN TRUNC(SYSDATE) <= (SELECT MIN(date_column) FROM table2 t2 WHERE t1.something = t2.something) THEN DATE1 ELSE DATE2 END; Etc.您需要弄清楚您的业务逻辑应该是什么,然后在这种情况下应用最合适的SQL逻辑。
在Oracle SQL中,可以使用多个CASE WHEN条件结合在一个SELECT语句中。以下是一个示例: SELECT column1, column2, CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 ELSE result3 END AS new_column1, CASE WHEN condition4 THEN result4 ...
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, ...
SQL Macros - Creating parameterised views This tutorial explains how to create a parameterized view using SQL Macros. The examples use the built-in sales history schema so there are no setup steps. Script Simple Explain Plan This script explains the plan for a query of the sh.sales and sh....
You can also select a tiled report template and a columnar report view, however multiple pages are not provided for printing in this configuration. Note: Columnar reports and views support active data updates only, and only under the following conditions: the updates do not change the grouping ...
1、上表结果中的"sex"是用代码表示的,希望将代码用中文表示。可在语句中使用case语句: </>code SQL> select u.id,u.name,u.sex, (case u.sex when 1 then '男' when 2 then '女' else '空的' end )性别 from users u; ID NAME SEX 性别 ...