sql - 从条件组返回多个行，不带联合

Question

我正在尝试在SQLite DB中构建一个支持条件分组的查询。

这是我到目前为止尝试过的：

SELECT 
      case 
       when A>1 AND B>1 THEN 1
       when X>1 AND Y>1 THEN 2
       when C>1 AND D>1 THEN 3
      END AS data_grp,
     SUM(col1) AS col1,
     SUM(col2) AS col2
FROM tbl
GROUP BY data_grp;

如果一次仅是一种情况，则此方法效果很好。如果连续有多个个案，则返回第一个个案，而不是所有令人满意的组。

我已经通过 union进行了尝试，该效果很好，但速度很慢。是否有其他方法可以通过此条件组快速获取结果。

样本数据和预期结果：

DROP TABLE IF EXISTS  tbl;
CREATE TABLE tbl
(
    A INT,
    B INT,
    C INT,
    D INT,
    X INT,
    Y INT,
    col1 int,
    col2 int

);

INSERT INTO tbl(A,B,C,D,X,Y,col1,col2) values (2,3,0,0,0,0,5,10);
INSERT INTO tbl(A,B,C,D,X,Y,col1,col2) values (0,0,0,0,8,10,3,2);
INSERT INTO tbl(A,B,C,D,X,Y,col1,col2) values (5,4,4,9,0,0,3,2);

    SELECT 
          case 
           when A>1 AND B>1 THEN 1
           when X>1 AND Y>1 THEN 2
           when C>1 AND D>1 THEN 3
          END AS data_grp,
         SUM(col1) AS col1,
         SUM(col2) AS col2
    FROM tbl
    GROUP BY data_grp;

查询输出：

"1" "8" "12"
"2" "3" "2"

预期产量：

"1" "8" "12"
"2" "3" "2"
"3" "3" "2"

Answer 1

由于组重叠，因此不能直接使用GROUP BY。
您可以使用以下方法，尽管这可能也会很慢。

WITH RECURSIVE
  cnt(x) AS (
     SELECT 1
     UNION ALL
     SELECT x+1 FROM cnt
      LIMIT 3
  )
SELECT x as data_grp, sum(col1), sum(col2)
FROM cnt, 
      (SELECT 
          case when A>1 AND B>1 THEN 1  ELSE 0 END as dg1,
          case when X>1 AND Y>1 THEN 2 ELSE 0 END as dg2,
          case when C>1 AND D>1 THEN 3 ELSE 0 END as dg3,
          col1, col2
        FROM tbl) t WHERE x=dg1 or x=dg2 or x=dg3
GROUP BY x