多个 table 加入操作中的问题

Question

我有两个表 tbLicence 和 tbLicenceTypes.

tbLicence 有三个字段 AgentId LineOfAuthority, LicenceTypes

tbLicence 包含类似

的数据

AgentId          LineOfAuthority                  LicenceTypes
.........      ....................               ................ 
 287       Bail Bond,Casualty,Dental Services         1
 287       Casualty,Industrial Fire,Life              4
 287       Industrial Fire,Life                       4

tbLicenceTypes 有两个字段 LicenceTypes, LicenceTypesX

tbLicenceTypes 包含类似

的数据

 LicenceTypes    LicenceTypesX   
 ............    .............
     1           Producer
     2          Sales Representative
     3          Insurance Agent
     4          Title Agent

现在我想获取分配给 Casualty 的所有许可证类型。我的意思是 AgentId 是 287 并且授权线是伤亡......预期的输出应该是这样的

LicenceTypes    LicenceTypesX
...........    ...............
      1          Producer
      4         Title Agent

我试过下面的代码行...它不起作用

;WITH cte AS (
SELECT 
    AgentId,
    CAST('<r>' + REPLACE(REPLACE(LineOfAuthority,'&','&amp;'), ',', '</r>  <r>') + '</r>' AS XML) AS LineOfAuthoritys
FROM tbLicence
 )
,FinalList AS (
SELECT 
AgentId,
RTRIM(LTRIM (PTable.PColumn.value('.', 'VARCHAR(MAX)'))) AS LineOfAuthoritys
FROM cte
CROSS APPLY LineOfAuthoritys.nodes('//r') AS PTable(PColumn) 
)
SELECT DISTINCT 
   T.LicenceTypes AS LicenceTypes ,
   F.LineOfAuthoritys AS LicenceTypesX  
  FROM FinalList F
  CROSS APPLY (SELECT LicenceTypes FROM tbLicenceTypes TP WHERE            TP.LicenceTypesX = f.LineOfAuthoritys) AS T
  WHERE F.LineOfAuthoritys = @LineOfAuthority
  AND F.AgentId = @AgentId
  ORDER BY T ASC

请帮帮我！！！

Answer 1

LineOfAuthority 应使用附加表重新设计为多对多关系。完成后，查询将是一件容易的事。如果你不知道如何建立多对多关系，你最好先阅读一些关于 RDBMS 的好书。

Answer 2

样本TABLE

CREATE TABLE #tbLicence (AgentId INT, LineOfAuthority VARCHAR(200), LicenceTypes INT)

INSERT INTO #tbLicence
SELECT    287,  'Bail Bond,Casualty,Dental Services',1
UNION ALL
SELECT     287,  'Casualty,Industrial Fire,Life',4
UNION ALL
SELECT     287,  'Industrial Fire,Life',4

CREATE TABLE #tbLicenceTypes(LicenceTypes INT, LicenceTypesX VARCHAR(200))

INSERT INTO #tbLicenceTypes
SELECT    1,  'Producer'
UNION ALL
SELECT     2,  'Sales Representative'
UNION ALL
SELECT     3,  'Insurance Agent'
UNION ALL
SELECT     4,  'Title Agent'

查询

;WITH cte AS 
(
    SELECT 
    AgentId,LicenceTypes,
    CAST('<r>' + REPLACE(REPLACE(LineOfAuthority,'&','&amp;'), ',', '</r>  <r>') + '</r>' AS XML) AS LineOfAuthoritys
    FROM tbLicence
)
,FinalList AS (
    SELECT 
    AgentId,LicenceTypes,
    RTRIM(LTRIM (PTable.PColumn.value('.', 'VARCHAR(MAX)'))) AS LineOfAuthoritys
    FROM cte
    CROSS APPLY LineOfAuthoritys.nodes('//r') AS PTable(PColumn) 
)  
SELECT DISTINCT 
   L.LicenceTypes AS LicenceTypes ,
   L.LicenceTypesX AS LicenceTypesX   
  FROM FinalList F
  JOIN tbLicenceTypes L ON F.LicenceTypes=L.LicenceTypes 
  WHERE F.LineOfAuthoritys = 'Casualty'
  AND F.AgentId = 287
  ORDER BY L.LicenceTypesX ASC

Click here 查看结果

多个 table 加入操作中的问题

Issue in multiple table join operation

sql

sql-server

sql-server-2008