我有一张表,我将从中获取所有值。 CREATE TABLE [dbo].[DiagnosticLog]
(
[DiagnosticLogID] [int] NOT NULL identity(-2147483648,1),
[ServerID] [int] NOT NULL, --changed to int for now
[MessageID] [sm
我有客户和应用程序表。我想创建选择查询,它提供有关客户的信息,并计算用户在系统中的数量。 select distinct c.id, c.region, c.city, count(a.customer_id_id)
from customers c
join applications a on c.id=a.customer_id_id
group by c.id;
,但我得到我需要按
我的表: drop table if exists new_table;
create table if not exists new_table(
obj_type int(4),
user_id varchar(30),
payer_id varchar(30)
);
insert into new_table (obj_type, user_id, pay
我想要显示的查询按父,然后孩子排序的结果。 这里是我的代码 SELECT * FROM
mst_category AS parent
LEFT JOIN mst_category AS child
ON child.category_parent = parent.category_id
GROUP BY parent.category_id
ORDER BY parent.catego