Oracle SQL - 将相同 table 的多行组合成自己的行

Question

我有一个 table 在 SQL Fiddle 上看起来像这个：http://sqlfiddle.com/#!4/0fabe0/2/0

table 包含 12 行。 6个属于一个"set"，另外6个属于另一个"set"。它们按标识符列分组。实际上，我要查询的 table 包含更多行和列。

我想制作一个 select，每个标识符给我一行。然后它应该显示 insertTime，然后为每个 "step" 显示 "Yes" 值，最后为每个 "step" 值显示 "No" 值。

我想我需要结合使用 group by、distinct 和 joins 来实现这一点，但我不知道该怎么做。

它应该是这样的：

+------------+------------------+----------+----------+----------+---------+---------+---------+
| identifier |    insertTime    | yesStep3 | yesStep2 | yesStep1 | noStep1 | noStep2 | noStep3 |
+------------+------------------+----------+----------+----------+---------+---------+---------+
|        123 | 08.04.2018 13:37 | 13.3     | 12.2     | 11.1     | 13      | 13.3    | 14.1    |
|        124 | 08.04.2018 13:40 | 14.14    | 13.13.   | 12.12.   | 10.1    | 11.11   | 9.9     |
+------------+------------------+----------+----------+----------+---------+---------+---------+

Answer 1

SQL Fiddle

Oracle 11g R2 架构设置:

CREATE TABLE testTable(
  identifier NUMBER(3,0),
  insertTime timestamp,
  yesNo      NUMBER(1,0),
  stepNumber NUMBER(1,0),
  value      NUMBER(5,2)
);

INSERT INTO testTable (identifier, insertTime, yesNo, stepNumber, value)
  SELECT 123, TIMESTAMP '2018-04-08 13:37:00', 0, 1, 13.0 FROM DUAL UNION ALL
  SELECT 123, TIMESTAMP '2018-04-08 13:37:00', 0, 2, 13.3 FROM DUAL UNION ALL
  SELECT 123, TIMESTAMP '2018-04-08 13:37:00', 0, 3, 14.1 FROM DUAL UNION ALL
  SELECT 123, TIMESTAMP '2018-04-08 13:37:00', 1, 1, 11.1 FROM DUAL UNION ALL
  SELECT 123, TIMESTAMP '2018-04-08 13:37:00', 1, 2, 12.2 FROM DUAL UNION ALL
  SELECT 123, TIMESTAMP '2018-04-08 13:37:00', 1, 3, 13.3 FROM DUAL UNION ALL
  SELECT 124, TIMESTAMP '2018-04-08 13:40:00', 0, 1,  9.9 FROM DUAL UNION ALL
  SELECT 124, TIMESTAMP '2018-04-08 13:40:00', 0, 2, 10.10 FROM DUAL UNION ALL
  SELECT 124, TIMESTAMP '2018-04-08 13:40:00', 0, 3, 11.11 FROM DUAL UNION ALL
  SELECT 124, TIMESTAMP '2018-04-08 13:40:00', 1, 1, 12.12 FROM DUAL UNION ALL
  SELECT 124, TIMESTAMP '2018-04-08 13:40:00', 1, 2, 13.13 FROM DUAL UNION ALL
  SELECT 124, TIMESTAMP '2018-04-08 13:40:00', 1, 3, 14.14 FROM DUAL;

查询 1:

SELECT identifier,
       insertTime,
       MAX( CASE WHEN yesNo = 1 AND stepNumber = 1 THEN value END ) AS yesStep1,
       MAX( CASE WHEN yesNo = 1 AND stepNumber = 2 THEN value END ) AS yesStep2,
       MAX( CASE WHEN yesNo = 1 AND stepNumber = 3 THEN value END ) AS yesStep3,
       MAX( CASE WHEN yesNo = 0 AND stepNumber = 1 THEN value END ) AS noStep1,
       MAX( CASE WHEN yesNo = 0 AND stepNumber = 2 THEN value END ) AS noStep2,
       MAX( CASE WHEN yesNo = 0 AND stepNumber = 3 THEN value END ) AS noStep3
FROM testTable
GROUP BY identifier, insertTime

Results:

| IDENTIFIER |            INSERTTIME | YESSTEP1 | YESSTEP2 | YESSTEP3 | NOSTEP1 | NOSTEP2 | NOSTEP3 |
|------------|-----------------------|----------|----------|----------|---------|---------|---------|
|        123 | 2018-04-08 13:37:00.0 |     11.1 |     12.2 |     13.3 |      13 |    13.3 |    14.1 |
|        124 | 2018-04-08 13:40:00.0 |    12.12 |    13.13 |    14.14 |     9.9 |    10.1 |   11.11 |

Oracle SQL - 将相同 table 的多行组合成自己的行

Oracle SQL - Combining multiple rows of same table into own row

sql

oracle

pivot

oracle10g