Question

我有两个名为Customer和ChangeLog的表。具有以下结构

客户表

ChangeLog Table

我的要求就是那个

我需要一个SSIS包，它将从另一个表读取记录，其结构与CustomerTable相同，然后比较两个表上的行。如果找到任何记录中的更改，它将更新customer表中的记录，并在ChangeLog中输入一个条目，说明哪个列已更新。

因此，如果在任何列中发现更改，我需要执行以下操作

更新客户表中的Coresposing记录
在ChangeLog中插入新行

客户表中不会有插入。只会有更新

我是否可以使用SSIS中的任何单个任务来执行更新以及插入这些不同的表？或者在SSIS中实现这一目标的最快捷有效的方法是什么？

非常感谢任何帮助

Answer 1

没有单一的SSIS任务可以做到这一点。我根本不会使用SSIS。将逻辑放在存储过程或触发器中。如果由于某种原因必须使用SSIS，则让SSIS调用存储过程，或者更新表并让触发器触发。

Answer 2

这比SSIS包更好，因为您可以使用触发器来检测行更改，甚至是值。

试试我的例子你可以将C / P带入管理工作室。当您在Sample_Table上更新时，您将在表中更改行和哪一列。

所以你能做的就是。将您的查找逻辑保留在SSIS中（如果您想在SSIS中使用某些内容） - 根据查找中的匹配更新表



当这些更新发生时，您的触发器将被触发并更新已更改的行。


另外，您可以在t-sql脚本中创建查找，并在custid = custid时进行普通更新，而不是简单。但这取决于你。

<强> EDITED

     -- -------------------- Setup tables and some initial data --------------------
 CREATE TABLE dbo.Sample_Table (ContactID int, Forename varchar(100), Surname varchar(100), Extn varchar(16), Email varchar(100), Age int );
 INSERT INTO Sample_Table VALUES (1,'Bob','Smith','2295','bs@example.com',24);
 INSERT INTO Sample_Table VALUES (2,'Alice','Brown','2255','ab@example.com',32);
 INSERT INTO Sample_Table VALUES (3,'Reg','Jones','2280','rj@example.com',19);
 INSERT INTO Sample_Table VALUES (4,'Mary','Doe','2216','md@example.com',28);
 INSERT INTO Sample_Table VALUES (5,'Peter','Nash','2214','pn@example.com',25);

 CREATE TABLE dbo.Sample_Table_Changes (ContactID int, FieldName sysname, FieldValueWas sql_variant, FieldValueIs sql_variant, modified datetime default (GETDATE()));

 GO

 -- -------------------- Create trigger --------------------
 CREATE TRIGGER TriggerName ON dbo.Sample_Table FOR DELETE, INSERT, UPDATE AS
 BEGIN
     SET NOCOUNT ON;
     --Unpivot deleted
     WITH deleted_unpvt AS (
         SELECT ContactID, FieldName, FieldValue
         FROM 
            (SELECT ContactID
                 , cast(Forename as sql_variant) Forename
                 , cast(Surname as sql_variant) Surname
                 , cast(Extn as sql_variant) Extn
                 , cast(Email as sql_variant) Email
                 , cast(Age as sql_variant) Age
            FROM deleted) p
         UNPIVOT
            (FieldValue FOR FieldName IN 
               (Forename, Surname, Extn, Email, Age)
         ) AS deleted_unpvt
     ),
     --Unpivot inserted
     inserted_unpvt AS (
         SELECT ContactID, FieldName, FieldValue
         FROM 
            (SELECT ContactID
                 , cast(Forename as sql_variant) Forename
                 , cast(Surname as sql_variant) Surname
                 , cast(Extn as sql_variant) Extn
                 , cast(Email as sql_variant) Email
                 , cast(Age as sql_variant) Age
            FROM inserted) p
         UNPIVOT
            (FieldValue FOR FieldName IN 
               (Forename, Surname, Extn, Email, Age)
         ) AS inserted_unpvt
     )

     --Join them together and show what's changed
     INSERT INTO Sample_Table_Changes (ContactID, FieldName, FieldValueWas, FieldValueIs)
     SELECT Coalesce (D.ContactID, I.ContactID) ContactID
         , Coalesce (D.FieldName, I.FieldName) FieldName
         , D.FieldValue as FieldValueWas
         , I.FieldValue AS FieldValueIs 
     FROM 
         deleted_unpvt d

             FULL OUTER JOIN 
         inserted_unpvt i
             on      D.ContactID = I.ContactID 
                 AND D.FieldName = I.FieldName
     WHERE
          D.FieldValue <> I.FieldValue --Changes
         OR (D.FieldValue IS NOT NULL AND I.FieldValue IS NULL) -- Deletions
         OR (D.FieldValue IS NULL AND I.FieldValue IS NOT NULL) -- Insertions
 END
 GO
 -- -------------------- Try some changes --------------------
 UPDATE Sample_Table SET age = age+1;
 /*UPDATE Sample_Table SET Extn = '5'+Extn where Extn Like '221_';

 DELETE FROM Sample_Table WHERE ContactID = 3;

 INSERT INTO Sample_Table VALUES (6,'Stephen','Turner','2299','st@example.com',25);

 UPDATE Sample_Table SET ContactID = 7 where ContactID = 4; --this will be shown as a delete and an insert
 -- -------------------- See the results --------------------
 SELECT *, SQL_VARIANT_PROPERTY(FieldValueWas, 'BaseType') FieldBaseType, SQL_VARIANT_PROPERTY(FieldValueWas, 'MaxLength') FieldMaxLength from Sample_Table_Changes;

 -- -------------------- Cleanup --------------------
 DROP TABLE dbo.Sample_Table; DROP TABLE dbo.Sample_Table_Changes;*/

 select * from dbo.sample_table_changes

从同一个包

2 个答案: