甲骨文选择支点查询中使用通用列名

Question

我有每个项目有一个计数器对

Customer 
    Name    Value 
    Bob     3 
    Bob     4 
    Sam     0 
    Sam     1 
    Joe     9 

我想下面的结果

Customer 
    Name    Value1   Value2 
    Bob     3    4 
    Sam     0    1 
    Joe     9 

我的表把相邻行自己的计数器部分已阅读此主题，Oracle query to put rows at odd number adjacent to even number，但我想避免使用MOD功能，而不是使用主轴代替。

Answer 1

这里不能用枢轴声明，如果你只有两个为每名（它也可以与日期，因为我们可以用最大值和最小值的日期）值：

select name, min(value) value1, nullif(max(value), min(value)) value2 
    from customer_tables 
group by name 

如果Bob ，Sam和其他有更多的两个值：

with t (Name, Value) as (
select 'Bob',3 from dual union all 
select 'Bob',4 from dual union all 
select 'Sam',0 from dual union all 
select 'Sam',1 from dual union all 
select 'Joe',9 from dual 
), t1 (name, value, rn) as (
select name, value, ROW_NUMBER() OVER(partition by name order by value) from t 
) 
select * from t1 
pivot XML (
    max(value) 
    for rn in (ANY) 
) 

SQL> l 
    1 with t (Name, Value) as (
    2 select 'Bob',3 from dual union all 
    3 select 'Bob',4 from dual union all 
    4 select 'Sam',0 from dual union all 
    5 select 'Sam',1 from dual union all 
    6 select 'Joe',9 from dual 
    7 ), t1 (name, value, rn) as (
    8 select name, value, ROW_NUMBER() OVER(partition by name order by value) from t 
    9 ) 
10 select * from t1 
11 pivot XML (
12 max(value) 
13 for rn in (ANY) 
14*) 
SQL>/

NAM RN_XML 
--- -------------------------------------------------------------------------------- 
Bob <PivotSet><item><column name = "RN">1</column><column name = "MAX(VALUE)">3</col 
    umn></item><item><column name = "RN">2</column><column name = "MAX(VALUE)">4</co 
    lumn></item></PivotSet> 

Joe <PivotSet><item><column name = "RN">1</column><column name = "MAX(VALUE)">9</col 
    umn></item></PivotSet> 

Sam <PivotSet><item><column name = "RN">1</column><column name = "MAX(VALUE)">0</col 
    umn></item><item><column name = "RN">2</column><column name = "MAX(VALUE)">1</co 
    lumn></item></PivotSet> 

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