Create History OR Audit Views from Change Data Capture ( CDC) Tables

/*-----------------------------------------------------------------------------------
After enabling CDC we want to Create AUDIT OR HIST Views
so we can get the changed records. The below script will
create View for each of the table on which CDC is enabled.


I have used Audit Schema, before you run the script,
Please create Audit Schema or If you want to have in Hist Schema
then please change Schema in Below Code from Audit To Hist.

View Definition ( Commit_Time,Colum_Name,Old_Value,New_Value,ModifiedBy)
--------------------------------------------------------------------------------------*/

IF OBJECT_ID(N'tempdb..##CDC_TableList') IS NOT NULL
BEGIN
    DROP TABLE ##CDC_TableList
END

SELECT T.name AS TableName,
       C.name AS ColumnName,
       'CASE WHEN (sys.Fn_cdc_is_bit_set (sys.Fn_cdc_get_column_ordinal (''dbo_'
       + T.name + ''',''' + C.name+
       + '''),__$update_mask) = 1) THEN Cast('
       + C.Name
       + ' AS SQL_VARIANT) ELSE NULL END AS '
       + C.name  AS CaseStm INTO ##CDC_TableList
FROM   sys.tables T
       INNER JOIN sys.columns c
               ON T.object_id = c.object_id
WHERE  is_tracked_by_cdc = 1
       AND c.is_identity = 0
       AND C.name NOT IN ( 'CreatedBy', 'CreatedDate', 'ModifiedBy', 'ModifiedDate' )
       AND T.type='U'
       AND T.is_ms_shipped<>1
     
       Select * from sys.tables


DECLARE @TableName NVARCHAR(200)
DECLARE cdc_cursor CURSOR FOR
SELECT DISTINCT TableName from ##CDC_TableList
OPEN cdc_cursor  
FETCH NEXT FROM cdc_cursor INTO @TableName


WHILE @@FETCH_STATUS = 0  
BEGIN

DECLARE @ColumnList  NVARCHAR(MAX)
DECLARE @CaseStmList NVARCHAR(MAX)
DECLARE @SQL_Stm  NVARCHAR(MAX)
DECLARE @SQL_Stm_DropView  NVARCHAR(MAX)
Print @TableName

SELECT@ColumnList = STUFF(o.COLUMNNAME, 1, 1, '')
FROM##CDC_TableList t CROSS APPLY  (SELECT',' + ColumnName+CHAR(10) AS [text()]
  FROM##CDC_TableList c
  WHERE    c.TableName = t.TableName
  FOR XML PATH('')) o (COLUMNNAME)
WHERE t.TableName=@TableName
PRINT @ColumnList

SELECT@CaseStmList = STUFF(o.COLUMNNAME, 1, 1, '')
FROM##CDC_TableList t CROSS APPLY  (SELECT',' + CaseStm+CHAR(10) AS [text()]
  FROM##CDC_TableList c
  WHERE    c.TableName = t.TableName
  FOR XML PATH('')) o (COLUMNNAME)
WHERE t.TableName=@TableName
--PRINT @CaseStmList

--If using Other Schema than AUDIT THEN change to that.
SET @SQL_Stm=' CREATE VIEW AUDIT.vw_'+@TableName+' AS

SELECT sys.Fn_cdc_map_lsn_to_time(up_b.__$start_lsn) AS Commit_Time, up_b.Column_Name, up_b.Old_Value, up_a.New_Value,up_a.ModifiedBy
FROM
    ( SELECT __$start_lsn, column_name, old_value,ModifiedBy
   FROM (SELECT __$start_lsn,'+@CaseStmList+',ModifiedBy FROM cdc.fn_cdc_get_all_changes_dbo_'+@TableName+'( sys.fn_cdc_get_min_lsn(''dbo_'+@TableName+'''), sys.fn_cdc_map_time_to_lsn(''largest less than or equal'',GETDATE()), N''all update old'')
 WHERE __$operation = 3
  ) AS BeforeUpdate
  UNPIVOT (old_value FOR column_name IN ('+@ColumnList+') ) AS unp) AS up_b INNER JOIN
  (SELECT __$start_lsn, column_name, new_value,ModifiedBy
   FROM (SELECT __$start_lsn,'+@CaseStmList+',ModifiedBy FROM cdc.fn_cdc_get_all_changes_dbo_'+@TableName+'(sys.fn_cdc_get_min_lsn(''dbo_'+@TableName+'''), sys.fn_cdc_map_time_to_lsn(''largest less than or equal'',GETDATE()), N''all'')
    WHERE __$operation = 4
   ) AS AfterUpdate
   UNPIVOT (new_value FOR column_name IN ('+@ColumnList+') ) AS unp ) AS up_a
ON up_b.__$start_lsn = up_a.__$start_lsn AND up_b.column_name = up_a.column_name'

--Drop View if already exists
SET @SQL_Stm_DropView= 'IF EXISTS (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.VIEWS
         WHERE TABLE_NAME = ''vw_'+@TableName+''')
   DROP VIEW AUDIT.vw_'+@TableName
   PRINT @SQL_Stm_DropView


EXEC (@SQL_Stm_DropView)
EXEC ( @SQL_Stm)
FETCH NEXT FROM cdc_cursor INTO @TableName
END  

CLOSE cdc_cursor  
DEALLOCATE cdc_cursor