c# - 从两个 where 条件返回 SQL 值以在 C# 中显示

Question

我有一个表，其中有一个 boolean 字段 扫描。

我想在 C# WinForm 中显示已完成和未决扫描的计数。

我在 SQL 中使用存储过程。

select count(1),sum(pages),count(distinct custId) from TableA where scanning=0 --Pending
select count(1),sum(pages),count(distinct custId) from TableA where scanning=1 --Done

我需要在 SQL 中创建两个存储过程，还是有办法从单个存储过程中获取结果。

Answer 1

SELECT
    PendingCnt = COUNT_BIG(CASE WHEN scanning = 0 THEN 1 END),
    PendingSum = ISNULL(SUM(CASE WHEN scanning = 0 THEN pages END), 0),
    PendingCustID = COUNT_BIG(DISTINCT CASE WHEN scanning = 0 THEN custId END),
    DoneCnt = COUNT_BIG(CASE WHEN scanning = 1 THEN 1 END),
    DoneSum = ISNULL(SUM(CASE WHEN scanning = 1 THEN pages END), 0),
    DoneCustID = COUNT_BIG(DISTINCT CASE WHEN scanning = 1 THEN custId END)
FROM TableA