SQL查詢校驗值在查找存在基於另一個列值

Question

我有一個表名稱/值對的記錄，我需要確認值存在針對查找每個名稱

KEYVAL - NameValue對錶

| MyID1 | MyRecNumber | MyFieldName | MyFieldValue | 
|-------|-------------|-------------|--------------| 
| 1  | 1   | FirstField | One   | 
| 2  | 1   | SecondField | Car   | 
| 3  | 2   | FirstField | Two   | 
| 4  | 2   | SecondField | Firetruck | 
| 5  | 3   | FirstField | Blue   | 
| 6  | 3   | SecondField | Car   | 

LookupTable中 - 表匹配（從KEYVAL）與LookupValue名稱值（CheckVals表）

| MyID2 | MyFieldName | LookupName | 
|-------|-------------|------------| 
| 1  | FirstField | FieldOne | 
| 2  | SecondField | FieldTwo | 

CheckVals - 表有效值每個字段

| MyID3 | LookupFieldName | LookupValue | 
|-------|-----------------|-------------| 
| 1  | FieldOne  | One   | 
| 2  | FieldOne  | Two   | 
| 3  | FieldOne  | Three  | 
| 4  | FieldTwo  | Car   | 
| 5  | FieldTwo  | Truck  | 
| 6  | FieldTwo  | Bus   | 

我有一個查詢，將檢查針對單個名稱查找值，但我不確定如何使這項檢查所有的名字對查找表。在此查詢中，它繞過LookupTable，因爲我在查詢本身中指定了查找值。

DECLARE @AttributeName AS VARCHAR(50) 
DECLARE @Lookup AS VARCHAR(50) 

SET @AttributeName = 'SecondField' 
SET @Lookup = 'FieldTwo'; 

SELECT 
    MyRecNumber, 
    MyFieldName, 
    MyFieldValue 
FROM 
    dbo.KeyVal kv 
WHERE 
    MyFieldName = @AttributeName 
    AND MyFieldValue NOT IN 
     (
      SELECT 
       LookupValue 
      FROM 
       dbo.CheckVals cv 
      WHERE cv.LookupFieldName = @Lookup 
     ) 

問：我如何才能做到對查找在KeyVal表中的所有值，通過LookupTable表，以檢查是否在MyFieldValue的價值CheckVals存在對MyFieldName和LookupName匹配？

這就是我希望能獲得 - 具有無效值查詢返回兩行結果

| MyRecNumber | MyFieldName | MyFieldValue | 
|-------------|-------------|--------------| 
| 2   | SecondField | Firetruck | 
| 3   | FirstField | Blue   | 

---

示例表

CREATE TABLE [dbo].[KeyVal](
    [MyID1] [smallint] IDENTITY(1,1) NOT NULL, 
    [MyRecNumber] [smallint] NULL, 
    [MyFieldName] [varchar](50) NULL, 
    [MyFieldValue] [varchar](50) NULL 
) ON [PRIMARY] 

CREATE TABLE [dbo].[LookupTable](
    [MyID2] [smallint] IDENTITY(1,1) NOT NULL, 
    [MyFieldName] [varchar](50) NULL, 
    [LookupName] [varchar](50) NULL 
) ON [PRIMARY] 

CREATE TABLE [dbo].[CheckVals](
    [MyID3] [smallint] IDENTITY(1,1) NOT NULL, 
    [LookupFieldName] [varchar](50) NULL, 
    [LookupValue] [varchar](50) NULL 
) ON [PRIMARY] 

樣本數據

INSERT INTO [dbo].[KeyVal] 
    ([MyRecNumber], [MyFieldName], [MyFieldValue]) 
VALUES 
    (1, 'FirstField', 'One'), 
    (1, 'SecondField', 'Car'), 
    (2, 'FirstField', 'Two'), 
    (2, 'SecondField', 'Firetruck'), 
    (3, 'FirstField', 'Blue'), 
    (3, 'SecondField', 'Car') 

INSERT INTO [dbo].[LookupTable] 
    ([MyFieldName], [LookupName]) 
VALUES 
    ('FirstField', 'FieldOne'), 
    ('SecondField', 'FieldTwo') 

INSERT INTO [dbo].[CheckVals] 
    ([LookupFieldName], [LookupValue]) 
VALUES 
    ('FieldOne', 'One'), 
    ('FieldOne', 'Two'), 
    ('FieldOne', 'Three'), 
    ('FieldTwo', 'Car'), 
    ('FieldTwo', 'Truck'), 
    ('FieldTwo', 'Bus') 

Answer 1

讓我假設你想要的第一個表中的行的值不匹配：

select kv.* 
from keyval kv left join 
    lookuptable lt 
    on kv.myfieldname = lt.myfieldname left join 
    checkvals cv 
    on cv.LookupFieldName = lt.LookupName and 
     cv.LookupValue = kv.MyFieldValue 
where cv.myid3 is null;