Question

我订购系统食品

我想这样做，当菜肴的所有状态都是＆＃34; COMPLETE＆＃34;时，订单会自动更改为完成

我有4张桌子

1订购

ID_ORDER：OR00001

状态：正在处理/自动更改＆＃34;完成＆＃34;

CREATION_DATE：17/07/2017

3 DISH

1 DISH PASTA

ID：PA00001

NAME：PASTA MIDELA

CHEF：JEFF

ID_ORDER：OR00001

状态：正在处理

2 DISH SALAD

ID：SA00001

姓名：饮食沙拉

CHEF：ASTON

ID_ORDER：OR00001

状态：正在处理

3 DISH MEAT

ID：ME00001

NAME：MEAT BBF

CHEF：JEFF

ID_ORDER：OR00001

状态：正在处理

怎么可能？谢谢

CREATE TABLE [dbo].[ORDER](
    [ID_OR] [int] IDENTITY(1,1) NOT NULL,
    [ID_ORDER]  AS ('OR'+right('00000'+CONVERT([varchar],[ID_OR],(0)),(5))),
    [STATUS] [datetime] NOT NULL,
    [CREATION_DATE] [datetime] NOT NULL,
 CONSTRAINT [PK_RR] PRIMARY KEY CLUSTERED 
(
    [ID_ORDER] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO

CREATE TABLE [dbo].[1_DISH](
    [ID_D1] [int] IDENTITY(1,1) NOT NULL,
    [ID_PASTA]  AS ('PA'+right('00000'+CONVERT([varchar],[ID_D1],(0)),(5))),
    [NAME] [varchar](20),
    [CHEF] [varchar](20),
    [STATUS] [datetime] NOT NULL,
    [ID_ORDER] [varchar](20)
 CONSTRAINT [PK_RR] PRIMARY KEY CLUSTERED 
(
    [ID_PASTA] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO

CREATE TABLE [dbo].[2_DISH](
    [ID_D2] [int] IDENTITY(1,1) NOT NULL,
    [ID_SALAD]  AS ('SA'+right('00000'+CONVERT([varchar],[ID_D2],(0)),(5))),
    [NAME] [varchar](20),
    [CHEF] [varchar](20),
    [STATUS] [datetime] NOT NULL,
    [ID_ORDER] [varchar](20)
 CONSTRAINT [PK_RR] PRIMARY KEY CLUSTERED 
(
    [ID_SALAD] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO

CREATE TABLE [dbo].[3_DISH](
    [ID_D3] [int] IDENTITY(1,1) NOT NULL,
    [ID_MEAT]  AS ('ME'+right('00000'+CONVERT([varchar],[ID_D3],(0)),(5))),
    [NAME] [varchar](20),
    [CHEF] [varchar](20),
    [STATUS] [datetime] NOT NULL,
    [ID_ORDER] [varchar](20)
 CONSTRAINT [PK_RR] PRIMARY KEY CLUSTERED 
(
    [ID_MEAT] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO

Answer 1

这里有一些可能对您有帮助的示例代码。

创建了两个表格：一个用于订单，另一个用于构成订单的菜单。

我在Dish表中添加了 DishType 列。我将状态更改为varchar数据类型。

declare @ORDERTABLE table 
(
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [STATUS] [varchar](20) NOT NULL,
    [CREATION_DATE] [datetime] NOT NULL
)

declare @DISHTABLE table
(
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [DISHTYPE] varchar(20),
    [NAME] [varchar](20),
    [CHEF] [varchar](20),
    [STATUS] [varchar](20) NOT NULL,
    [ID_ORDER] int
)

插入一些示例数据。

insert @ORDERTABLE (STATUS, CREATION_DATE) values
('IN PROCESS', getdate()),
('IN PROCESS', getdate());

insert @DISHTABLE (DISHTYPE, NAME, CHEF, STATUS, ID_ORDER) values
('PASTA','PASTA MIDELA','JEFF','IN PROCESS',1),
('SALAD','DIET SALAD','KIA','IN PROCESS',1),
('MEAT','MEAT BBF','BART','IN PROCESS',1),
('SALAD','CAESAR SALAD','KIA','IN PROCESS',2),
('MEAT','ROAST CHICKEN','BART','IN PROCESS',2);

update @DISHTABLE set STATUS = 'COMPLETE' where ID = 1;
update @DISHTABLE set STATUS = 'COMPLETE' where ID = 2;
update @DISHTABLE set STATUS = 'COMPLETE' where ID = 3;

select * from @DISHTABLE;

自动更改订单状态的简单方法：每当您更改菜肴的状态时，请检查订单中的菜肴数量与完成的菜肴数量。如果所有菜肴都已完成，那么也要更改订单状态。

declare @ORDERID int = 1;

update @ORDERTABLE 
    set STATUS = 'COMPLETE' 
where 
    ID = @ORDERID 
    and (select count(*) from @DISHTABLE where ID_ORDER = @ORDERID) = (select count(*) from @DISHTABLE where ID_ORDER = @ORDERID and STATUS = 'COMPLETE');


select 
    o.ID, 
    DISHES = (select count(*) from @DISHTABLE where ID_ORDER = o.ID),
    COMPLETED = (select count(*) from @DISHTABLE where ID_ORDER = o.ID and STATUS = 'COMPLETE'),
    o.STATUS
from @ORDERTABLE o;

可以在sql中进行此操作吗？

1 个答案: