Question

我需要以两种不同的货币（美元和玻利维亚诺）获得公司的业务量。我在存储过程中进行了两次查询，但它确实有效。我的问题是我不知道如何在一个独特的查询中合并它们，因为它们几乎是一样的。

SELECT @amount_dollars = ISNULL(SUM(Amount), 0.00) 
FROM ProcessBatches
WHERE 
    CompanyId = @company_id
    AND CONVERT(CHAR(8), DateProcess, 112) = @current_date
    AND Currency = 'USD'
    AND OperationTypeId NOT IN (17,18)
    AND State IN ('P','W','N','A')

SELECT @amount_bols = ISNULL(SUM(Amount), 0.00)
FROM ProcessBatches
WHERE 
    CompanyId = @company_id
    AND CONVERT(CHAR(8), DateProcess, 112) = @current_date
    AND Currency = 'BOL'
    AND OperationTypeId NOT IN (17,18)
    AND State IN ('P','W','N','A')

我不是SQL的专家。提前致谢并抱歉我的英语（我正在学习）

Answer 1

只需使用条件聚合：

SELECT @amount_dollars = COALESCE(SUM(CASE WHEN Currency = 'USD' THEN Amount END), 0.00) ,
       @amount_bols = COALESCE(SUM(CASE WHEN Currency = 'BOL' THEN Amount END), 0.00)          
FROM ProcessBatches
WHERE  CompanyId = @company_id AND
       CAST(DateProcess as date) = @current_date AND
       Currency IN ('BOL', 'USD') AND
       OperationTypeId NOT IN (17, 18) AND
       State IN ('P', 'W', 'N', 'A');

注意：我更改了date比较以使用date数据类型。这比使用字符串比较要好得多。此外，转换为日期仍然允许使用索引（在SQL Server中）。

试图改进查询

1 个答案: