Oracle中case when的用法 最早接触case when是在行列转的时候,数据库中最难的就是各种的查询,此次的业务需要导出Excel,导出的内容包含了很多的字段,各种联合查询,还有需要计算、分组联合等。历经整整一下午终于以近两百行结束了这个业务。特记录对于case when的用法,欢迎各位朋友指正,不喜勿喷。 首先case when有两种...
Example 2-51 Simple CASE Expression with WHEN NULL 代码语言:javascript 代码运行次数:0 运行 AI代码解释 DECLAREgradeCHAR(1);--NULLbydefaultappraisalVARCHAR2(20);BEGINappraisal:=CASEgradeWHENNULLTHEN'No grade assigned'WHEN'A'THEN'Excellent'WHEN'B'THEN'Very Good'WHEN'C'THEN'Good'WHEN'D'THEN'Fair...
E.g.: The data types of the returned values should be the same. In the example below, one argument is assigned a numeric value resulting in an error. SQL> select sal, case when sal < 2000 then 'category 1' 2 when sal < 3000 then 0 3 when sal < 4000 then 'category 3' 4 else...
In this example, if the deptno column has a 10 in it, the SQL query will return the value accounting rather than the number 10. If the deptno is not 10, 20, 30, or 40, then the CASE statement will fall through to the ELSE clause, which will return unassigned. Note that with a s...
不然会导致转换无效. SELECT id, case WHEN cast(`status` AS SIGNED) < 45 THEN '1' WHEN cast...
In this example, the result set is sorted by the column state when the country is theUSand by the column city for all other countries. B) Using CASE expression in a HAVING clause# Consider the followingorder_itemsandproductstables:
WHEN d < e THEN 'goodbye' END FROM suppliers; Frequently Asked Questions Question:Can you create a CASE statement that evaluates two different fields? I want to return a value based on the combinations in two different fields. Answer:Yes, below is an example of a case statement that evaluat...
Theidattribute specifies a unique identifier for this component; the id will be referenced later by other components. Theclassattribute specifies the class that implements the adapter; in this case it iscom.bea.wlevs.adapter.example.helloworld.HelloWorldAdapter. ...
. The use of Software in systems and solutions that provide dedicated functionality (other than as mentioned above) or designed for use in embedded or function-specific software applications, for example but not limited to: Software embedded in or bundled with industrial control systems, wireless ...
Note: The Oracle BAM start page URL is case sensitive. Enter the URL exactly as indicated in the example. The Oracle BAM login page opens. 2. Log in with your user name and password. The Oracle BAM start page opens. 3. Click the buttons in the start page to launch the applications....