计数特定属性

-1

我有以下查询我知道是不正确的语法计数特定属性

SELECT Vender as Carrier, 
count(IsPup WHERE IsPup = 1) as PU, 
count(IsFull WHERE IsFull = 1) as FU, 
count(*) as NUM, count(IsPup)/2 + Count(IsFull) as FTE 
FROM Trailers WHERE Completed = 0 group by Vender order by NUM;

特别是count(IsPup WHERE IsPup = 1)是错误的，我已经搜查各种短语，如“如何计算在SQL行的多个属性”等并试图在同一查询的其他操作一样count(IsPup) as PU, count(IsFull) as FU

我有语法正确的查询

SELECT Vender as Carrier, 
count(IsPup) as PU, 
count(IsFull) as FU, 
count(*) as NUM, 
count(IsPup)/2 + Count(IsFull) as FTE 
FROM Trailers WHERE Completed = 0 group by Vender order by NUM

其中运行，但PU，FU和NUM始终是相同的值...

我试图得到一个表像下面

| Carrier | PU  | FU | NUM | FTE | 
-------------------------------------------- 
| Vender1 | 2   | 1 | 3 | 2 | 
| Vender2 | 0   | 4 | 4 | 4 | 
| TOTAL  | 2   | 5 | 7 | 6 |

的拖车表有IsPup和IsFull作为BIT类型，所以它们是真或假（0或1）我认为这个查询会很简单，觉得我缺少一些明显的东西

如何获得每个单独的属性和总数的计数？标记的重复问题与底部总数的格式不匹配。

来源

2017-10-12 hellyale

“IsPup”和“IsFull”的潜在价值是什么？看起来你可以使用SUM（CASE）语句。然后在'Group By'后面使用'With Rollup' –

[基于SQL Server中的条件计数]的可能重复（https://stackoverflow.com/questions/3455201/count-based-on-condition-in-sql - 服务器） –

你想谷歌什么是“基于条件的sql服务器几个计数” –

SELECT 
    VENDER 
, SUM(CAST(IsPUP AS INT)) AS PU 
, SUM(CAST(IsFull AS INT)) AS FU 
, COUNT(*) AS NUM 
, SUM(CAST(IsPUP AS INT)) * .5 + SUM(CAST(IsFull AS INT)) 
FROM Trailers 
WHERE COMPLETED = 0 
GROUP BY VENDER 
WITH ROLLUP

来源

2017-10-12 17:53:20

计数特定属性

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