SQL查询 - 按列

Question

我有一个SQL查询，目前显示这些结果：

Product ID Vendor Site Location 
-----------------------------------------------
ANTIFOAM 51 CHEMICAL COMPANY MANUFACTURING SITE
ANTIFOAM 51 CHEMICAL COMPANY MANUFACTURING SITE
ANTIFOAM 51 CHEMICAL COMPANY HQ HQ-FOOD
ACID 509    CSPA MANUFACTURING SITE
ACID 509    CSPA HQ HQ-FOOD
ACID 509    NORTH MANUFACTURING SITE
ACID 509    NORTH HQ HQ-FOOD

我需要首先在总部订购，然后是生产现场。

非常感谢任何帮助！

所以看起来应该是这样的：

Product ID Vendor Site Location
----------------------------------------
ANTIFOAM 51 CHEMICAL COMPANY HQ HQ-FOOD
ANTIFOAM 51 CHEMICAL COMPANY MANUFACTURING SITE
ANTIFOAM 51 CHEMICAL COMPANY MANUFACTURING SITE
ACID 509    CSPA HQ HQ-FOOD
ACID 509    CSPA MANUFACTURING SITE
ACID 509    NORTH HQ HQ-FOOD
ACID 509    NORTH MANUFACTURING SITE

Answer 1

＆＃34; HQ＆＃34;来之前＆＃34; MA＆＃34;在en-us语言环境中，假设＆＃34; HQ-FOOD＆＃34;和＆＃34;制造网站＆＃34;是列中唯一的两个值，您可以使用默认排序顺序：

select * from table order by ID, SiteLocation, Vendor

Answer 2

在PostgreSQL中：

select * from t1
order by
    id,
    regexp_replace(vendor,'\s+HQ$',''),
    case when site_location='HQ-FOOD' then 1 else 2 end
;

有关regexp_replace()的文档，请参阅here。

测试夹具

drop table if exists t1;
create table t1 (product text, id int, vendor text, site_location text );
insert into t1 (product,id,vendor,site_location) values
    ('ANTIFOAM',51,'CHEMICAL COMPANY','MANUFACTURING SITE'),
    ('ANTIFOAM',51,'CHEMICAL COMPANY','MANUFACTURING SITE'),
    ('ANTIFOAM',51,'CHEMICAL COMPANY HQ','HQ-FOOD'),
    ('ACID',509,'CSPA ','MANUFACTURING SITE'),
    ('ACID',509,'CSPA  HQ','HQ-FOOD'),
    ('ACID',509,'NORTH','MANUFACTURING SITE'),
    ('ACID',509,'NORTH HQ','HQ-FOOD')
;

Answer 3

您可以看到我的代码（在SQL Server中）：

create table #t2 (product varchar(100), id int, vendor varchar(100), site_location varchar(100) );
insert into #t2 (product,id,vendor,site_location) values
    ('ANTIFOAM',51,'CHEMICAL COMPANY','MANUFACTURING SITE'),
    ('ANTIFOAM',51,'CHEMICAL COMPANY','MANUFACTURING SITE'),
    ('ANTIFOAM',51,'CHEMICAL COMPANY HQ','HQ-FOOD'),
    ('ACID',509,'CSPA ','MANUFACTURING SITE'),
    ('ACID',509,'CSPA  HQ','HQ-FOOD'),
    ('ACID',509,'NORTH','MANUFACTURING SITE'),
    ('ACID',509,'NORTH HQ','HQ-FOOD')

select product,id,vendor,site_location
from #t2
order by vendor desc

drop table #t2

输出：

ACID    509 NORTH HQ    HQ-FOOD
ACID    509 NORTH   MANUFACTURING SITE
ACID    509 CSPA  HQ    HQ-FOOD
ACID    509 CSPA    MANUFACTURING SITE
ANTIFOAM    51  CHEMICAL COMPANY HQ HQ-FOOD
ANTIFOAM    51  CHEMICAL COMPANY    MANUFACTURING SITE
ANTIFOAM    51  CHEMICAL COMPANY    MANUFACTURING SITE