oracle sql中条件条件的动态数 [英] dynamic number of where condition in oracle sql

问题描述

我需要为报表工具中的提示编写一个sql.我在用'-'分隔的变量中获得了多个值的列表，并且这些值的数量可以变化.(例如，1."abc-def" eg2."abc-def-xyz").

I need to write a sql for a prompt in a reporting tool. I get the list of multiple values in a variable separated by '-' and the number of such values can vary.(eg1."abc-def" eg2."abc-def-xyz").

现在，我需要在逻辑上使用这种形式的oracle编写sql

Now I need to write sql in oracle of this form(logically)

select something
  from somewhere
 where someColumn in 'abc' -- use substr to extract abc
    or someColumn in 'def' -- use substr to extract def
    or ...till we don't find '-'.

我无法使用plsql进行查询.我可能不知道要使用我在plsql中选择的变量，或者可能是报表工具不支持该变量.

I can't use plsql for the query. Either I may not be knowing to use the variable in which I select into in plsql or may be the reporting tool doesn't support that.

谢谢.

推荐答案

尝试

select something
  from somewhere
 where someColumn in (select regexp_substr('abc-def-xyz','[^-]+', 1, level) from dual
                     connect by regexp_substr('abc-def-xyz', '[^-]+', 1, level) is not null);

概括(考虑您的字段以-"分隔)

To generalize (considering your fields are separated by "-")

select something
  from somewhere
 where someColumn in (select regexp_substr(variable,'[^-]+', 1, level) from dual
                     connect by regexp_substr(variable, '[^-]+', 1, level) is not null);

基本上，子查询的输出如下所示-

Basically the output of the subquery is shown below -

  SQL> select regexp_substr('abc-def-xyz','[^-]+', 1, level) value from dual
      connect by regexp_substr('abc-def-xyz', '[^-]+', 1, level) is not null;

VALUE                            
-------------------------------- 
abc                              
def                              
xyz  

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