SQL 将案例结果与 Select 中的数据连接起来

Question

我想要完成的是让案例的结果包含数据的结果。我的案例是 1 和 2，它们进入一个表格，导致 2 列 ID |状态 |状态描述。我想将数据的结果与 CASE 的结果一起加入。

我有一个用于结果的表和 2 个在案例中加入的表。

@ZipCode    varchar(5),
@Tribal     varchar(5)

as

DECLARE @Status varchar(30)
SELECT @Status = CASE
when exists (SELECT ZipCodeCoverage.ZipCode, ZipCodeCoverage.State, ServicePlan, plan_name
 FROM [LifelineReference].[dbo].[ZipCodeCoverage]
    JOIN [VcareData].[dbo].[tbl_plan] ON [ZipCodeCoverage].[State]= [plan_state]

where ZipCode = @ZipCode and is_tribal = @Tribal and life_line = 'Y')   then '1' 
ELSE 2
 END
Select * FROM [LifelineReference].[dbo].[LifelinePlanStatusCodes]
    where ID = @Status

状态码表

ID |   STATUS     | StatusDescription
1  |   Success    | Transaction May Proceed
2  |   FAIL       | Do not continue

我需要我的结果是什么

ID |  STATUS | StatusDescription | ZipCode | State |  ServicePlan | plan_name

Answer 1

我想我明白了。这是我想出的

@ZipCode    varchar(5),
@Tribal     varchar(5)

as

DECLARE @Status varchar(30)

 SELECT @Status = CASE
when exists (SELECT ZipCodeCoverage.ZipCode, ZipCodeCoverage.State, ServicePlan, plan_name
 FROM [LifelineReference].[dbo].[ZipCodeCoverage]
    JOIN [VcareData].[dbo].[tbl_plan] ON [ZipCodeCoverage].[State]=[plan_state]
       where ZipCode = @ZipCode and is_tribal = @Tribal and life_line = 'Y')  then '1' 
 ELSE 2
 end


 Select *
 ,(SELECT ZipCodeCoverage.ZipCode  
 FROM [LifelineReference].[dbo].[ZipCodeCoverage]
    JOIN [VcareData].[dbo].[tbl_plan] ON [ZipCodeCoverage].[State]=[plan_state]
       where ZipCode = @ZipCode and is_tribal = @Tribal and life_line = 'Y') as ZipCode
 ,(SELECT ZipCodeCoverage.State 
 FROM [LifelineReference].[dbo].[ZipCodeCoverage]
    JOIN [VcareData].[dbo].[tbl_plan] ON [ZipCodeCoverage].[State]=[plan_state]
       where ZipCode = @ZipCode and is_tribal = @Tribal and life_line = 'Y') as State
    ,(SELECT ServicePlan 
 FROM [LifelineReference].[dbo].[ZipCodeCoverage]
    JOIN [VcareData].[dbo].[tbl_plan] ON [ZipCodeCoverage].[State]=[plan_state]
       where ZipCode = @ZipCode and is_tribal = @Tribal and life_line = 'Y') as ServicePlan
  ,(SELECT plan_name
 FROM [LifelineReference].[dbo].[ZipCodeCoverage]
    JOIN [VcareData].[dbo].[tbl_plan] ON [ZipCodeCoverage].[State]=[plan_state]
       where ZipCode = @ZipCode and is_tribal = @Tribal and life_line = 'Y') as plan_name
FROM [LifelineReference].[dbo].[LifelinePlanStatusCodes]
    where ID = @Status

给我结果：

 ID Status  StatusDescription   ZipCode State   ServicePlan plan_name
  1 SUCCESS Service is Available    48322   MI  ABC Michigan Wireless XXXX Service Free250

Answer 2

这是当 1 时只有第一行应该显示的结果。当 2 a failed 应该显示没有其他信息.. 当 2 NO 数据全部显示出来时.. 几乎就好像结果是在 case 之后运行的......

ID  Status  StatusDescription   ZipCode State   ServicePlan plan_name
1   SUCCESS Service is Available    48322   MI  ARV15   Michigan Wireless Lifeline Service Free250
2   FAILED  NO Service Available in this Area   48322   MI  ARV15   MI PAY AS YOU GO
2   FAILED  NO Service Available in this Area   48322   MI  ARV15   MI Non Lifeline UNLIMITED TALK & TEXT
2   FAILED  NO Service Available in this Area   48322   MI  ARV15   MI Non Lifeline 250 TALK OR 500 TEXT 30 DAYS

Answer 3

这是一种更简洁的解决方案，它不会重复相同的 SQL 语句，而是在一个查询中执行。不完全理解所涉及的表的字段、它们的数据和它们的关系有点困难。我假设 ZipCodeCoverage 将邮政编码与州相关联，is_tribal 和 life_line 等字段是 tbl_plan 的一部分，并且 LifelinePlanStatusCodes 中存在状态 2 记录。

更新

以下解决方案使用公用表表达式 (CTE)，以便不会重复查询。但是，在更好地了解您要查找的内容之后，使用 if exists (...) 可能会更清楚，选择您想要的结果，否则选择 FAIL 记录。这重复了部分查询一次，但意图也很明确。或者，我不知道您是如何使用结果的，但我倾向于处理调用应用程序中的失败条件——只返回成功记录（使用第一个查询），如果没有返回记录，则将其视为失败。

在任何情况下，CTE 解决方案都会在 FoundPlan_CTE 中获取您的计划并加入状态代码，但如果 FoundPlan_CTE 返回任何记录，则选择的状态代码为 1（成功），如果 FoundPlan_CTE 未返回任何记录，则选择的状态代码为 2（失败） .

with FoundPlan_CTE (ZipCode, State, ServicePlan, plan_name)
as
(
    select
        z.ZipCode
        ,z.State
        ,p.ServicePlan
        ,p.plan_name
    from
        [LifelineReference].[dbo].[ZipCodeCoverage] z
        inner join [VcareData].[dbo].[tbl_plan] p on p.plan_state = z.State
    where
        z.ZipCode = @ZipCode
        and p.is_tribal = @Tribal
        and p.life_line = 'Y'
)
select
    s.ID
    ,s.Status
    ,s.StatusDescription
    ,p.ZipCode
    ,p.State
    ,p.ServicePlan
    ,p.plan_name
from
    [LifelineReference].[dbo].[LifelinePlanStatusCodes] s
    left outer join FoundPlan_CTE p on 1 = 1
where
    s.ID = isnull((select top 1 1 from FoundPlan_CTE),2)