SQL 数据透视表中的总计

Question

我想获取电子表格之类的总计到我拥有的这个 SQL 数据透视表。下面可以很好地以没有小计的数据透视格式显示值。如果有一种方法可以同时获得行和列的总计，那就太好了。如果没有，至少total在底部就好了。

SELECT * 
  FROM (SELECT period, status
          FROM tasks )
 PIVOT
 (
  COUNT(status)
    FOR status IN ('Completed' AS "Completed", 
                   'WIP' AS "WIP",
                   'Not Started' AS "Not Started")
 )
ORDER BY period

Answer 1

除了使用 PIVOT，您还可以使用 ROLLUP 和条件聚合：

SELECT CASE GROUPING_ID(period) WHEN 1 THEN 'TOTAL' ELSE TO_CHAR(period) END AS period,
       COUNT(CASE status WHEN 'Completed'   THEN 1 END) AS completed,
       COUNT(CASE status WHEN 'WIP'         THEN 1 END) AS wip,
       COUNT(CASE status WHEN 'Not Started' THEN 1 END) AS not_started,
       COUNT(*) AS total
FROM   tasks
GROUP BY ROLLUP(period)
ORDER BY period;

其中，对于示例数据：

CREATE TABLE tasks (period, status) AS
SELECT 1, 'Completed'   FROM DUAL CONNECT BY LEVEL <= 3 UNION ALL
SELECT 1, 'WIP'         FROM DUAL CONNECT BY LEVEL <= 2 UNION ALL
SELECT 1, 'Not Started' FROM DUAL CONNECT BY LEVEL <= 1 UNION ALL
SELECT 2, 'Completed'   FROM DUAL CONNECT BY LEVEL <= 2 UNION ALL
SELECT 2, 'WIP'         FROM DUAL CONNECT BY LEVEL <= 1 UNION ALL
SELECT 3, 'Completed'   FROM DUAL CONNECT BY LEVEL <= 4 UNION ALL
SELECT 3, 'Not Started' FROM DUAL CONNECT BY LEVEL <= 2;

输出：

PERIOD COMPLETED WIP NOT_STARTED TOTAL

1 3 2 1 6

2 2 1 0 3

3 4 0 2 6

TOTAL 9 3 3 15

db<>fiddle here

SQL 数据透视表中的总计

Totals in SQL Pivot

sql

oracle

pivot