Simply, because of the way that DECODE is documented to work. When dealing with the return datatype of DECODE, Oracle looks at the first return value datatype and uses that, in this case NULL. NULL must therefore default to a VARCHAR2. The "fix"? Be explicit, i.e. SQL> SELECT x, ...
Pushed into mysql-trunk 5.6.99-m5 (revid:alexander.nozdrin@oracle.com-20101113155825-czmva9kg4n31anmu) (version source revid:vasil.dimov@oracle.com-20100629074804-359l9m9gniauxr94) (merge vers: 5.6.99-m4) (pib:21) [22 Nov 2010 0:47] Paul DuBois ...
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Oracle PL / SQL Analytical Functions Rank RANK() with NULLS FIRST SQL> CREATE TABLE all_sales ( 2 year INTEGER, 3 month INTEGER, 4 prd_type_id INTEGER, 5 emp_id INTEGER , 6 amount NUMBER(8, 2) 7 ); Table created. SQL> SQL> insert into all_sales (YEAR,MONTH,PRD_TYPE_ID,EMP...
servlet-api.jar 这个架包，需要你手动导入支持。 解决方案如下： 1、选中项目（在 ...
dense_rank() over (order by comm desc nulls last) : DENSE_RANK « Analytical Functions « Oracle PL / SQL
Not sure about DB2 and I'm not sure which RDBMS you're using Greg (didn't look at you previous threads), but COALESCE also works in place of NVL in Oracle. EDIT... sorry... just saw that you're using Informix... --Jeff Moden ...
In this case, by including both types of counts in each group, we’re providing a handy way to provide insight into our source data.Failure #9: Forgetting about NULL in your Boolean expressionsBoolean expressions that involve NULL values can be especially tricky because...
The innermost subquery gets the most recent id where there is a value. The outermost one "...
Re: group_concat Query w/ Generated Nulls n/a n/a July 06, 2018 04:04PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily ...