查询计数帮助

Question

我的查询并不完全满足我的需求：

select COUNT(distinct OrderID)
from Images
where OrderID like 'btm%'
group by OrderID

表格如

订单ID

btm1
btm1
btm1
btm2
btm2
btm3

我想回来：

btm1 | 3
btm2 | 2
btm3 | 1

Answer 1

select orderid, count(*) from Images group by orderid

Answer 2

除了@Zdravko Danev所拥有的内容之外，如果你的查询确实需要，你可以添加like子句：

select orderid,COUNT(orderid)
from t1
where orderid like 'btm%'
group by orderid

fiddle