Question

查询1：

SELECT sum(quantity) 
FROM `tbl_stock` 
WHERE item_id = '4' 
  AND div_id = '1' 
  AND internal_reel_no = 'DP1000585' 
  AND txn_type IN ('IN')
GROUP BY div_id, item_id, txn_type

QUERY2：

SELECT sum(quantity) 
FROM `tbl_stock` 
WHERE item_id = '4' 
  AND div_id = '1' 
  AND internal_reel_no = 'DP1000585' 
  AND txn_type IN ('IS')
GROUP BY div_id, item_id, txn_type

我想将Query1的sum(quantity)减去Query2的sum(quantity)。

请让我知道答案

Answer 1

这是另一个选项，它更通用，不涉及任何原始查询逻辑：

SELECT sum(quantity) INTO @sum1
FROM `tbl_stock` 
WHERE item_id = '4' 
  AND div_id = '1' 
  AND internal_reel_no = 'DP1000585' 
  AND txn_type IN ('IN')
GROUP BY div_id, item_id, txn_type;

SELECT sum(quantity) INTO @sum2
FROM `tbl_stock` 
WHERE item_id = '4' 
  AND div_id = '1' 
  AND internal_reel_no = 'DP1000585' 
  AND txn_type IN ('IS')
GROUP BY div_id, item_id, txn_type;

SELECT @sum1- @sum2;

Answer 2

的子查询。

    select q1_sum-q2_sum
    from( SELECT sum(quantity) as q1_sum
FROM `tbl_stock` 
WHERE item_id = '4' 
  AND div_id = '1' 
  AND internal_reel_no = 'DP1000585' 
  AND txn_type IN ('IN')
GROUP BY div_id, item_id, txn_type
    cross join
    SELECT sum(quantity) as q2_sum
FROM `tbl_stock` 
WHERE item_id = '4' 
  AND div_id = '1' 
  AND internal_reel_no = 'DP1000585' 
  AND txn_type IN ('IN')
GROUP BY div_id, item_id, txn_type
)

Answer 3

我会尝试：

SELECT 
    sum(case when txn_type = 'IN' then quantity else 0 end) 
    - sum(case when txn_type = 'IS' then quantity else 0 end) 
FROM `tbl_stock` 
WHERE item_id = '4' 
  AND div_id = '1' 
  AND internal_reel_no = 'DP1000585' 
  AND txn_type IN ('IN','IS')
GROUP BY div_id, item_id

注意：这可以在MSSQL中运行 - 您必须在MySQL中尝试

Answer 4

SELECT SUM( CASE WHEN txn_type = 'IN' THEN quantity
                 WHEN txn_type = 'IS' THEN -quantity
                 END
          ) AS result
FROM
  ( SELECT txn_type, SUM(quantity) AS quantity
    FROM tbl_stock 
    WHERE item_id = '4' 
      AND div_id = '1' 
      AND internal_reel_no = 'DP1000585' 
      AND txn_type IN ('IN', 'IS')
    GROUP BY div_id, item_id, txn_type
  ) AS grp

Answer 5

SELECT sum(quantity)
FROM tbl_stock
WHERE item_id='4'
AND div_id='1'
AND internal_reel_no='DP1000585'
AND txn_type IN ('IS') OR txn_type IN ('IN')
GROUP BY div_id, item_id, txn_type

从另一个查询的结果中减去1个查询的结果

5 个答案: