今天提交程序之后,反应有BUG,经仔细查询,发现一个之前并没注意到的问题,那就是case when 语句在Oracle中执行的BUG,用脚本来说明; Oracle --建表 CREATE TABLE TABLE_01 (CODE INT NOT NULL, NAME VARCHAR2(20) NULL); --插入数值,之所以分别插入null和''是因为在Sybase中''和null是... ...
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...
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:
应该是不可以.除非是 子查询:select case when col1 = 1 then (select count(1) from tab_b ) else 0 endfrom tab_a. OQL是SOD框架的ORM查询语言,它类似Linq,但是它诞生的历史比Linq早,并且更加接近SQL语法。所以,对SOD框架而言,对应ORM如何支持CASE WHEN,就等于是问OQL如何支持CASE WHEN了。 这个问题已...
position or by keywords.An exampleofthe formercaseis 'sqlldr scott/tiger foo'; an example of the latter is 'sqlldr control=foo userid=scott/tiger'.One may specify parameters by position before but not after parameters specified by keywords.For example,'sqlldr scott/tiger control=foo logfile=lo...
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. ...
Next, he takes a look at the Memory Statistics and Garbage Collector panels, which show additional information about memory usage and the garbage collector, respectively. If necessary, Marcus can change some of the values from this tab; for example he could change the allocated Java heap size ...
When requesting the entire result set, do it sparingly and in very specific use cases. For example, when you want to approximate a file download for the contents of an entire table. But even in this case, we recommend you exercise extreme caution. If possible, paginate with larger page siz...