Oracle SQL Pivot 多列答案

【问题标题】：Oracle SQL Pivot Multiple ColumnsOracle SQL Pivot 多列
【发布时间】：2019-09-21 17:12:31
【问题描述】：

我有一个数据集，其中 1 个 LICENSE_ID 已拆分为多行。我想合并这些行，因此每个 PERSON_ID 和 LICENSE_ID 组合有 1 行。

这是我的数据的格式：

SELECT '123456789' AS PERSON_ID, '1' AS LICENSE_ID, 'NUMBER' AS FIELD, '123' AS EXPECTED, '124' AS ACTUAL, 'UPDATE' AS ACTION FROM DUAL UNION ALL
SELECT '123456789' AS PERSON_ID, '1' AS LICENSE_ID, 'ISSUE_DT' AS FIELD, '43498' AS EXPECTED, '43498' AS ACTUAL, 'NA' AS ACTION FROM DUAL UNION ALL
SELECT '123456789' AS PERSON_ID, '2' AS LICENSE_ID, 'NUMBER' AS FIELD, '888' AS EXPECTED, '888' AS ACTUAL, 'NA' AS ACTION FROM DUAL UNION ALL
SELECT '123456789' AS PERSON_ID, '2' AS LICENSE_ID, 'ISSUE_DT' AS FIELD, '43498' AS EXPECTED, '' AS ACTUAL, 'UPDATE' AS ACTION FROM DUAL

表格如下所示：

我需要的输出是这样的：

【问题讨论】：

标签： sql oracle pivot transpose unpivot

【解决方案1】：

您可以使用条件聚合：

select person_id, licence_id,
       max(case when field = 'NUMBER' then expected end) as expected_number,
       max(case when field = 'NUMBER' then actual end) as actual_number,
       max(case when field = 'NUMBER' then actual end) as actual_number,
       max(case when field = 'ISSUE_DT' then expected end) as expected_issue_dt,
       max(case when field = 'ISSUE_DT' then actual end) as actual_issue_dt,
       max(case when field = 'ISSUE_DT' then action end) as actual_issue_dt_action,
from t
group by person_id, licence_id

【讨论】：