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在这个答案中（所有可执行的简化和记录的示例代码+有用的评论）

我在那里做了一种技巧来计算下表的最后两行：

DESCR                              SUM       
---------------------------------- ----------
money available in 2013            33233235.3
money spent in 2013                 4253235.3
money bound to contracts in 2013     34333500
money spent 2013 in % of available         12
money bound 2013 in % of available        103

有人知道执行此类操作的更好（性能、代码量、可理解性）方法吗？

（比起使用应用的“提供联合空行，在 n+1 聚合级别-trick上填充 case 和 product()-over() ” ，我们称之为punurofiwicapoonalt -trick（naah ... 仍然很复杂）.. . 听起来像 - 是的 - 让我们称之为色情-trick ;O) （......好吧......别名capoon -trick 如果你不喜欢它））

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1 回答 1

0

多亏了 Oracle 论坛中GregVMODEL的语法功能提示，我可以编写这个查询非常简短和精确，而无需色情。凉爽的！

因此，要轻松检查与我的示例代码和至少10g的Oracle db 的区别，您只需通过以下方式修改上面链接的原始脚本：

        /**************************
         * the original sample query base data
         ***************************/
        ...  -- all content before the last select of the original example-SQL

        /**************************
         * the original sample porno-query
         ***************************/

        ,agg_porno as (
            select
                descr,

                ...  -- all the porno-query details

            from sum_data_lvl1
            /*
             DESCR                              SUM        AGG_LVL SUM_ID
             ---------------------------------- ---------- ------- ------
             money available in 2013            33233235.3       1 MA
             money spent in 2013                 4253235.3       1 MS
             money bound to contracts in 2013     34333500       1 MB
             money spent 2013 in % of available         12       2 MSP
             money bound 2013 in % of available        103       2 MBP
            */
        )

        /**************************
         * the new nice model-based query instead
         ***************************/

        ,agg_model as (
            select
                descr,
                trunc(s,1) as sum,
                agg_lvl,
                sum_id 
            from sum_data_lvl1
            model
                dimension by (sum_id)
                measures (descr, sum as s, agg_lvl)
                rules (
                    s['MSP'] = s['MS'] / s['MA'] * 100,
                    s['MBP'] = s['MB'] / s['MA'] * 100
                )
        )
        /*
         DESCR                              SUM        AGG_LVL SUM_ID
         ---------------------------------- ---------- ------- ------
         money available in 2013            33233235.3       1 MA
         money spent in 2013                 4253235.3       1 MS
         money bound to contracts in 2013     34333500       1 MB
         money spent 2013 in % of available       12.7       2 MSP
         money bound 2013 in % of available      103.3       2 MBP
         */

select * from agg_porno where 1=0  -- change to 1=1 to see these results
union all select * from agg_model where 1=1  -- change to 1=0 to hide these results
于 2014-02-24T12:08:48.840 回答