您的要求并不完全清楚,但看起来您正在尝试创建一个名为的新列c
然后是一个row_number()
与之相关——c1, c2 c3, etc
.
如果您要在子查询中使用以下内容:
SELECT Val1, Val2,
'C'+ cast(row_number() over(partition by Val2
order by val1) as varchar(10)) col
FROM TEMP1
See SQL 摆弄演示 http://sqlfiddle.com/#!3/eebf4/13
你会得到结果:
| VAL1 | VAL2 | COL |
----------------------
| S01 | 00731 | C1 |
| S02 | 00731 | C2 |
| S03 | 00731 | C3 |
| S04 | 00731 | C4 |
| S05 | 00731 | C5 |
| S06 | 00731 | C6 |
| S07 | 00731 | C7 |
| S07 | 00731 | C8 |
| S08 | 00731 | C9 |
| S09 | 00731 | C10 |
| S04 | 00741 | C1 |
| S01 | 00746 | C1 |
| S01 | 00770 | C1 |
| S01 | 00771 | C1 |
| S02 | 00771 | C2 |
这似乎是您想要的结果PIVOT
。然后您将应用PIVOT
对此使用:
SELECT Val2,
c1, c2, c3, c4, c5, c6, c7, c8, c9, c10
FROM
(
SELECT Val1, Val2,
'C'+ cast(row_number() over(partition by Val2
order by val1) as varchar(10)) col
FROM TEMP1
) src
PIVOT
(
MAX(Val1)
FOR col IN (C1, C2, C3, C4, C5, C6, C7, C8, C9, C10)
) piv;
See SQL 摆弄演示 http://sqlfiddle.com/#!3/eebf4/15。那么你的最终结果是:
| VAL2 | C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 |
------------------------------------------------------------------------------------------------
| 00731 | S01 | S02 | S03 | S04 | S05 | S06 | S07 | S07 | S08 | S09 |
| 00741 | S04 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
| 00746 | S01 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
| 00770 | S01 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
| 00771 | S01 | S02 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
注意:我的结果与您所要求的期望结果略有不同,因为我正在执行ORDER BY val1
这导致S07
要组合在一起的值。
除非您请求一个,否则数据库中的数据没有顺序,因此不能保证其中之一S07
值将显示为C10
。您可以使用以下内容来获得结果,但有没有保证结果将始终按正确的顺序排列:
SELECT Val2,
c1, c2, c3, c4, c5, c6, c7, c8, c9, c10
FROM
(
SELECT Val1, Val2,
'C'+ cast(row_number() over(partition by Val2
order by (select 1)) as varchar(10)) col
FROM TEMP1
) src
PIVOT
(
MAX(Val1)
FOR col IN (C1, C2, C3, C4, C5, C6, C7, C8, C9, C10)
) piv;
See SQL 摆弄演示 http://sqlfiddle.com/#!3/eebf4/16。使用order by (select 1)
改变数据的顺序,但不保证它总是按该顺序。结果是:
| VAL2 | C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 |
------------------------------------------------------------------------------------------------
| 00731 | S01 | S02 | S03 | S04 | S05 | S06 | S07 | S08 | S09 | S07 |
| 00741 | S04 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
| 00746 | S01 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
| 00770 | S01 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
| 00771 | S01 | S02 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |