我问这个问题是我的主表的小模型。
我有一个表Neue IP Addresse: 1.2.3.4
Get IP: 1.2.3.4
Neue IP Addresse: 5.6.7.8
Get IP: 5.6.7.8
1.2.3.4 == 5.6.7.8 =
... in operator == ...
this Adress: 1.2.3.4
compareTo Adress: 5.6.7.8
this first block: 1
compareTo first block: 5
this first block second printout: 5 <------- this should be 1
1
,我想要一个来自SQL查询的结果表:
Product
Color | existing Color count | existing sizes from this color
----------+------------------------+--------------------------------
red | 20 | 3
black | 12 | 4
表具有Product
列。
我写了这个SQL语句:
[Id, Name, Color, Size, Price]
答案 0 :(得分:2)
Select color,count(color),count(distinct size) from table
group by color;
这是您想要的吗?