Hello,
I do have one table "ABC" in DB "Master" & other table "XYZ" in DB "Test".
Both tables are having same structures & same data currently. Now i want to create trigger in such a way that after every insertion & updation on table "ABC" in DB "Master" will insert & update records in table "XYZ" in DB "Test" respectively.
Can any one help me out?
Thanks
Prashant Hirani
Where Dreams Never Ends
Hi,
If I want to automatically insert a record which has default value in a table,
how can I create the trigger?
I want to create a trigger in SQL 2000 Enterprise, but not sure about triggers, how they work, etc. I just know that I was told I could create a trigger when new info is added to one table and check another table to see if this info is already in the other table, if not, copy the data to the other table too.
Would this be what a trigger can do for me?
what would be the best place to learn how triggers work, how to write one and install it, test it, etc?
I have 3 tables on my db, Projects, ProljectAllocationLog and Users
Project consists of Projectid(PK), ProjectName, UserID
ProjectAllocationLog consists of ProjectAllocationID(PK), Projectid, UserID,Date
Users consists of UserID (PK), Fullname
Over the course of time the user allocated to a project may change. The db has been set up to always show the most current user in the UserID of the Projects table,
I want to create a log that will record everytime that user has changed. (ProjectAllocationLog)
Having read through some examples posted on Forums, I believe that I can do this with a trigger, but I am not sure if I am doing it right, the trigger I have written is
Create Trigger tr_UpdateAllocationLog
ON Projects
AFTER Update
AS
If NOT UPDATE (Userid)
DECLARE @PROJECTID
DECLARE @NEWUSER
DECLARE @PREVIOUSUSER
SET @PROJECTID= (SELECT projected FROM Inserted)
SET @NEWUSER = (SELECT UserID from Inserted)
SET @ PREVIOUSUSER = (SELECT UserID from Deleted)
If @NEWUSER <> @PREVIOUSUSER
INSERT INTO ProjectAllocationLog (ProjectID, UserID, Date) VALUES (@PROJECTID, @NEWUSER, GETDATE())
Go
I would appreciate any comments
I need help writing an Update trigger that puts the current date in a changed record. I understand the basic idea but can't seem to get it to work. Any help would be greatly appreciated
View 1 Replies View Relatedi am trying to create a trigger which when I insert a "y" on a student table in insCheck column, instructor table will create a record of the same person.
The reason is there are two tables are in my DB, student and instructor table. Student can be a instructor so whenever insCheck conlum in studnent table is checked as "y", instructor table should be populated.
Both table studentId and instructorId inserted as manually so that I am not sure how i should populate the instructor's table just fName, mI, and lName and I have go back to the instructor table and populate the rest of the table manually or is there any way to poppulate the insturctorid also while trigger is populate the name onthe instructor table.
My Two tables DDL are like down below
create table student(
studentId char(4) not null primary key,
fName varchar(25) not null,
mI char(1) null,
lName varchar(25) not null,
insCheck char(1) not null,
);
create table instructor(
instructorId char(4) not null primary key,
fName varchar(25) not null,
mI char(1) null,
lName varchar(25) not null,
instructorQual varchar(100) not null,
);
thanks for your help in advance!
gazawaymy
There are 2 tables: OrderID and Order_Details
CREATE TABLE Orders
(OrderID int
Constraint Order_ID_pk primary key
, CustomerID nchar (5)
, EmployeeID int
, OrderDate datetime
, RequiredDate datetime
, ShippedDate datetime
, ShipVia int
, Freight money
, ShipName nvarchar (40)
, ShipAddress nvarchar (60)
, ShipCity nvarchar (15)
, ShipRegion nvarchar (15)
, ShipPostalCode nvarchar (10)
, ShipCountry nvarchar (15)
)
CREATE TABLE Order_Details
(OrderID int NOT NULL
, ProductID int NOT NULL
, UnitPrice money NOT NULL
, Quantity smallint NOT NULL
, Discount real NOT NULL
, constraint Order_Details_PK
Primary key (OrderID, ProductID)
)
Create a Transact SQL procedure, customer_activity, that would, for a given CustomerID, return the number of orders that customer has made, average amount of all the customer orders, and the maximum customer’s order. The CustomerID should be the stored procedure’s input parameter. The stored procedure should use the view customer_orders.
what kind of code to create this? it says i need to use a view customer_orders, which i made:
create view customer_orders as
select orders.orderID, customerID, sum(order_details.orderID) as orderamount
from orders, order_details where orders.orderID=order_details.orderID
group by orders.orderID, customerID
but i don't know how to do it.
Next: the trigger:
Write a trigger that would, for any order entered (inserted), print the order amount as well as the customer’s average and maximum order so far, by using the view and the stored procedures created in this lab.
please and thank you
I have problem with Triggers,Iv never done it before except @school!!
One of our clients Server has same database names(WeighBridge) but Different Instances(1got Express and Other3 have SQL2005).There is a weighbridge scale on SQL Express Database.
I want to create a Trigger that Automatically updates everytime there is weighbridge scale In other Databases that have SQL2005.
If someone can help please a code or tell me what to do,
Create a Trigger on a Table ot Database??
Please Help!!!!!!
Hi Everyone,
I have a database which once every week gets backup/restored and then renamed for training purpose. The problem is that I got trigger on some of the tables and once the database gets renamed the trigger failed to work as it referring to the old database name. I have idenify all the trigger and done a ALTER TRIGGER. However I can't seem to get it to run as a JOB. Tried to create a store procedure but get a error as the ALTER TIGGER is after CREATE PROCEDURE I could do it as a SQLstring but theirs alot of trigger, want to know if there any other ways of doing it. Please help
I am creating a trigger in SQL Server that will activate when my Athelete table has something "Inserted"
So far it works except for the fact that it won't insert a null into the Equipment_ID field. I need it to autoincrement, or do the last number + 1...
CREATE TRIGGER TRG_NEW_EQUIPMENT1
ON ATHLETE AFTER INSERT
AS
BEGIN
INSERT INTO Equipment Equipment_ID, Equipment_Model, Equipment_Year, Equipment_Brand, Equipment_Color, Equipment_Condition_Rating)
VALUES ('Big Spin','2016','K2','Blue','5')
END;
GO
I've got a ContactInfo table, that stores a variety of information about a contact (i.e. first/last name, address, phone, date of birth, status, etc.). I seem to be randomly loosing contacts though. Older backup's of my database still show a given contact, but the current one doesn't. It's happened a few times, and I can't seem to track what's causing it. (Nothing that I'm doing *should* be causing the contact to be deleted).
I'm looking to create a delete trigger for the table, so that any time a record gets delete, it will record what record got deleted (contactID, firstName, lastName), as well as what time it got deleted, and if possible, what function cause the delete (what function was accessing the table when the delete happened).
I've got some basic knowledge of SQL, and SQL statements, but my knowledge is limited... so any help on this would be greatly appreciated - or, if someone could point me to a website with good suggestions and examples, to help me create a trigger to monitor this stuff. I would be greatly indebted for any help that could be offered.
Here is kind of a shell for a delete trigger that I have been able to put together from some various examples I've found.
IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'trDeleteContactInfo' AND type = 'TR')
DROP TRIGGER trDeleteContactInfo
GO
CREATE OR REPLACE TRIGGER trDeleteContactInfo
on ContactInfo
FOR DELETE
AS
EXEC master..xp_sendmail 'my@email.com',
'Contact has just been deleted from ContactInformation Table'
GO
I'm using a Database called COMPANY and witihn this I have a table called Works_on.
I'm looking to create a trigger for update on Works_on that if the Hours coloum changes it MUST NOT be reduced and also that it can't be increase by more than 5%
Any idea how I can code this??
I've got a ContactInfo table, that stores a variety of information about a contact (i.e. first/last name, address, phone, date of birth, status, etc.). I seem to be randomly loosing contacts though. Older backup's of my database still show a given contact, but the current one doesn't. It's happened a few times, and I can't seem to track what's causing it. (Nothing that I'm doing *should* be causing the contact to be deleted).
Can anyone help me with setting up a simple Delete Trigger, so that whenever a contact gets deleted from the table, it will log as munch information as possible about what just happened (maybe what functions just got ran, what info just changed, whatever...); so that way I can try and get some more information on the problem, and try and diagnose what is causing the deletions.
I've got some basic knowledge of SQL, and SQL statements, but my knowledge is limited... so any help on this would be greatly appreciated - or, if someone could point me to a website with good suggestions and examples, to help me create a trigger to monitor this stuff. I would be greatly indebted for any help that could be offered.
Hello
I am new to sql and asp, I am using visual web developer and have table that when it gets change I would like to see another table populated with the information. This is the two tables I have
First one has the information in it that users will insert in it
asset_id int Unchecked
asset_desc varchar(50) Checked
serial_no varchar(50) Unchecked
model_no varchar(50) Checked
category bigint Unchecked
Manufacturer varchar(50) Checked
Mac_address varchar(50) Checked
service_pack varchar(50) Checked
owner bigint Unchecked
location bigint Unchecked
date_acquired datetime Checked
date_deactivated datetime Checked
system_asset_no varchar(50) Checked
cs_desc varchar(50) Checked
vendor varchar(50) Checked
modified_date datetime Checked
action varchar(50) Checked
Unchecked
Next table is the one I want the information to go in
history_asset_id int Unchecked
history_asset_desc varchar(50) Checked
history_serial_no varchar(50) Checked
history_model_no varchar(50) Checked
history_category bigint Checked
history_manufacturer varchar(50) Checked
history_mac_address varchar(50) Checked
history_service_pack varchar(50) Checked
history_owner bigint Checked
history_location bigint Checked
history_date_acquired datetime Checked
history_date_deactivated datetime Checked
history_system_asset_no varchar(50) Checked
history_cs_desc varchar(50) Checked
history_vendor varchar(50) Checked
[modified date] datetime Checked
action varchar(50) Checked
Unchecked
the column action is for the name of person updating and modified date is the system date. My trigger is this
Create TRIGGER Trigger4
ON dbo.t_asset
FOR INSERT /* INSERT, UPDATE, DELETE */
AS
INSERT INTO history_asset_id
(history_asset_id, history_asset_desc, history_asset_orderno, history_asset_invoiceno, history_asset_yellowno, history_asset_serial_number,history_asset_cost, history_asset_fedpart, history_date_acquired, history_asset_cond, history_cat_id, history_bld_id, history_loc_name,history_date_deactivated, history_asset_dispvalue, action, modified_date)
VALUES ('@asset_id','@asset_desc','@asset_orderno','@asset_invoiceno','@asset_yellowno','@asset_serial_number','@asset_cost','@asset_fedpart','@date_acquired','@asset_cond','@cat_id','@bld_id','@loc_name','@date_deactivated','@asset_dispvalue','@action','@sysdate')
Can anyone please help me or point me in the right direction, rbynum@kansascommerce.com
I'd like to create a primary key value (incremental) within a trigger and set it in a primary key column.
Any idea anyone? Do I define my trigger as a On INSERT, Instead of INSERT? I tried both but it doesn't seem I'm doing things right.
Can anyone assist me?
I am trying to create a trigger within our local database that will allow me submit an email to a local exchange server. Its an internal email that our company has created for responses by candidates when the original stored procedure meets a condition of TRUE.
Is SQL 7.0 capable of sending emails to a specified address through a Trigger? I was told it could but have yet to come across any documentation backing this up.
Would anyone know the generic syntax I can use to create such a trigger?
Any suggestions would be appreciated.
Thanks in advance,
Claude Johnson
cjohnson@staffmentor.net
I want a stored procedure to run everytime the batch Status field is set to 'Released'
<Code>
CREATE TRIGGER [CSITSS].[tdecker].[FB401BV_TRIGGER] ON [CSITSS].[dbo].[Fbbatch] FOR UPDATE [Status]
AS
DECLARE @RC int
DECLARE @Batch int
SET @Batch = (??? BATCH NUMBER THAT WAS SET TO RELEASE ???)
EXEC @RC = [CSITSS].[tdecker].[GLP_FB401BV_BATCH] @Batch
</Code>
Hello,
I have a problem that definitely has me stumped.
I have a view that looks at data in a different database. Some of the fields in the view are updateable and some are not. I am trying to create a trigger against the view that will allow me to audit the updates into an audit table. I am having problems when trying to execute the CREATE TRIGGER statement.
I keep getting the message...
Server: Msg 208, Level 16, State 4, Procedure updDocInfo, Line 1
Invalid object name 'vwDC_DocInfo'.
Where vwDC_DocInfo is the name of the view.
Does anyone have any idea why I might be getting this error? The VIEW definitely does exist and I am executing the script in the same database as the view.
The script is included below...
CREATE TRIGGER updDocInfo
ON [vwDC_DocInfo]
FOR UPDATE AS
DECLARE @ModifiedDate AS DATETIME
SELECT @ModifiedDate = GETDATE()
-- Audit OLD record.
INSERT tblAudit_DC_DocInfo
SELECT
0 AS AuditType,
ItemID,
Comment,
VersionComment,
CheckedOut,
Title,
BaseParagonDocumentNumber,
Author,
ClientDocumentNumber,
ClientDocumentType,
ClientJobNumber,
[Module],
Unit,
SequenceNumber,
RevisionDate,
ApprovedBy,
CheckedDepartmentManager,
CheckedLeadEngineerDesigner,
IssueType,
RevisedByDesigner,
RevisedByEngineer,
RevisionCode,
HSECheck,
CurrentVersionNumber,
CurrentVersionDate,
USER AS ChangedByUser,
@ModifiedDate AS DateChanged
FROM DELETED DEL
-- Audit NEW record.
INSERT tblAudit_DC_DocInfo
SELECT
0 AS AuditType,
ItemID,
Comment,
VersionComment,
CheckedOut,
Title,
BaseParagonDocumentNumber,
Author,
ClientDocumentNumber,
ClientDocumentType,
ClientJobNumber,
[Module],
Unit,
SequenceNumber,
RevisionDate,
ApprovedBy,
CheckedDepartmentManager,
CheckedLeadEngineerDesigner,
IssueType,
RevisedByDesigner,
RevisedByEngineer,
RevisionCode,
HSECheck,
CurrentVersionNumber,
CurrentVersionDate,
USER AS ChangedByUser,
@ModifiedDate AS DateChanged
FROM INSERTED INS
hi,i am a beginner to ms sql server2000i have a tablecreate table ddd (a int, b int)by table structure is a bnow when i enter a value in b column suppose '2' in column bbext time when i insert a value in the column a i have to get the valuein b as 3 is thi spossible with triggersinsert into gdg values (1,2)a b1 2insert into gdg (a) values(2)a b2 3----------------> i have to get this 3 automaticallyis there any method to get thispls help mesatish
View 1 Replies View RelatedI am extremely new at SQL Server2000 and t-sql and I'm looking tocreate a simple trigger. For explanation sake, let's say I have 3columns in one table ... Col_1, Col_2 and Col_3. The data type forCol_1 and Col_2 are bit and Col_3 is char. I want to set a trigger onCol_2 to compare Col_1 to Col_2 when Col_2 is updated and if they'rethe same, set the value on Col_3 to "Completed". Can someone pleasehelp me?Thanks,Justin
View 7 Replies View Relatedhello everyone ,
i have a table named "Employee" with EmpID as PK.
i want to insert EmpID one by one in another table named "AssignedComplaints"
so if i have all the EmpID inserted in "AssignedComplaints" table then on next insert operation , the first EmpID will be inserted and then second on so on.
like i gave u a sample
i have three EmpIDs in "Employee" table named M1,M2,M3
first M1 is inserted secondly M2 and lastly M3.
now i have all EmpID in "AssignedCompalints" table.
now if i do want to insert again then the whole process will repeat , first M1 will be inserted secondly M2 and so on.
i need the query
i have created a trigger and will use this query in that trigger.
thanks
I am using the tables created by the aspnet_regsql.exe tool for security. Basically, I need to ensure that an account named Administrator is never deleted. I also have a role named administrator, and I need to make sure that Administrator is never removed from the administrator role.Can I create a trigger to ensure that the Administrator is never deleted and that the Administrator is never removed from the Administrator role? I know it will probably be two separate triggers: one on the aspnet_users table and one on the aspnet_usersinroles table.Thanks a lot for the help!
View 1 Replies View Related
Hi,
i am facing a problem with creating a Trigger to insert into another table.
i have 4 tables namely:
PurchaseOrder
PurchaseOrderItem
DeliveryOrder
DeliveryOrderItem
i want the trigger to create a new row in the DeliveryOrder when i creates a PurchaseOrder.
I tried the following:
CREATE TRIGGER trgInsertPO
ON PurchaseOrder
FOR INSERT
AS
INSERT INTO DeliveryOrder (DeliveryOrderNo,DeliveryOrderDate, SupplierID, DeliveryOrderStatus)
VALUES (PurchaseOrderNo,PurchaseOrderDate,SupplierID,'d')
GO
but it cant work. Help required.
Thanks.
I'm hoping one of you will be able to help me because I haven't had very good luck finding any information on this.
I'm kind of new to SQL, but I'm learning as much as I can.
I created a web form that sends a new record to a SQL 2005 table I setup.
This all works exactly as it should, but I would like to have an email sent out every time a record is added to this table.
I have SQL Mail setup and I ran a test and it worked, but I can't seem to find any info on how to create a trigger that will send an email to me when a new record is added to the table.
My Database is called Engineering
The table is called ESSPartNumLog
And I have the following Columns that I would like to send in my email..
ESSSequence (PK,int, not null)
MaterialType (nvarchar(255, null)
ESSPrefix (nvarchar(255, null)
PartDescription (nvarchar(255, null)
Project (nvarchar(255, null)
PM (nvarchar(255, null)
Any ideas, or can you point me in the right direction?
Hi all,
My code below creates a trigger that fires whenever a change occurs to a 'myTable' row, but this is not what I want. I only want to log changes made to a single field called 'Charges', when that field is changed I want to log it, can anyone tell me how to modify my code to do this, thanks
Create Trigger dbo.myTrigger
ON dbo.[myTable]
FOR UPDATE
AS
Declare @now DATETIME
Set @now = getdate()
BEGIN TRY
Insert INTO dbo.myAuditTable
(RowImage,Charges,ChangeDate,ChangeUser)
SELECT 'BEFORE',Charges,@now, suser_sname()
FROM DELETED
Insert INTO dbo.myAuditTable
(RowImage,Charges,ChangeDate,ChangeUser)
SELECT 'AFTER',Charges,@now, suser_sname()
FROM INSERTED
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION
END CATCH
Hi,
When a record is to be inserted, how can I check whether the insert is succeeded or not?
CREATE TRIGGER MY_TRIGGER ON MyTable AFTER INSERT
AS
DECLARE @id INT
DECLARE @name NVARCHAR(50)
SELECT @id=id,@name=name FROM INSERTED
BEGIN
INSERT INTO MySubTable(id,name) VALUES(@id,@name)
-- if failed, rollback
END
GO
GO
I need creating an update trigger that involved two tables and a few fields.
tblCases
Fields
Defendent1
Defendent2
Defendant3
tblCaseBillingDetails
Fields
DefCount
I would like to create the trigger on tblCaseBillingDetails so that when the data in the Defendant fields are updated, the trigger fires and updates the Defendant count DefCount.
Hi,I'm a newbie to sql server and this may be a really dumb question forsome you. I'm trying to find some examples of sql server triggers thatwill set columns (e.g. the created and modified date columns) if the rowis being inserted and set a column (e.g. just the modified date column)if the row is being updated.I know how to do this in oracle plsql. I would define it as a beforeinsert or update trigger and reference old and new instances of therecord. Does sql server have an equivalent? Is there a better way to dothis in sql server?Thanksericthis is what i do in oracle that i'm trying to do in sqlserver...CREATE OR REPLACE TRIGGER tr_temp_biubefore insert or updateon tempreferencing old as old new as newfor each rowbeginif inserting then:new.created_date := sysdate;end if;:new.modified_date := sysdate;end tr_temp_biu;
View 1 Replies View RelatedHi,
I've created initial indexes for my table for the fuzzylookup process. I clicked on "Maintained index" but I don't see any triggers created on the reference table.
Do I create the triggers to maintain indexes myself?
Does anybody know how to create these triggers in terms of schema_name, Data_Modification_Statements etc.?
Would it be "Alter index <index name> REBUILD command?
Appreciate the help.
Gulden
I need to deploy the trigger in database whenever new DB is creating on the server.
View 6 Replies View RelatedHey,
I'm new to this whole SQL Server 2005 thing as well as database design and I've read up on various ways I can integrate business constraints into my database. I'm not sure which way applies to me, but I could use a helping hand in the right direction.
A quick explanation of the various tables I'm dealing with:
WBS - the Work Breakdown Structure, for example: A - Widget 1, AA - Widget 1 Subsystem 1, and etc.
Impacts - the Risk or Opportunity impacts for the weights of a part/assembly. (See Assemblies have Impacts below)
Allocations - the review of the product in question, say Widget 1, in terms of various weight totals, including all parts. Example - September allocation, Initial Demo allocation, etc. Mostly used for weight history and trending
Parts - There are hundreds of Parts which will eventually lead to thousands. Each part has a WBS element. [Seems redundant, but parts are managed in-house, and WBS elements are cross-company and issued by the Government]
Parts have Allocations - For weight history and trending (see Allocations). Example, Nut 17 can have a September 1st allocation, a September 5th allocation, etc.
Assemblies - Parts are assemblies by themselves and can belong to multiple assemblies. Now, there can be multiple parts on a product, say, an unmanned ground vehicle (UGV), and so those parts can belong to a higher "assembly" [For example, there can be 3 Nut 17's (lower assembly) on Widget 1 Subsystem 2 (higher assembly) and 4 more on Widget 1 Subsystem 5, etc.]. What I'm concerned about is ensuring that the weight roll-ups are accurate for all of the assemblies.
Assemblies have Impacts - There is a risk and opportunity impact setup modeled into this design to allow for a risk or opportunity to be marked on a per-assembly level. That's all this table represents.
A part is allocated a weight and then assigned to an assembly. The Assemblies table holds this hierarchical information - the lower assembly and the higher one, both of which are Parts entries in the [Parts have Allocations] table.
Therefore, to ensure proper weight roll ups in the [Parts have Allocations] table on a per part-basis, I would like to check for any inserts, updates, deletes on both the [Parts have Allocations] table as well as the [Assemblies] table and then re-calculate the weight roll up for every assembly. Now, I'm not sure if this is a huge performance hog, but I do need to keep all the information as up-to-date and as accurate as possible. As such, I'm not sure which method is even correct, although it seems an AFTER DML trigger is in order (from what I've gathered thus far). Keep in mind, this trigger needs to go through and check every WBS or Part and then go through and check all of it's associated assemblies and then ensure the weights are correct by re-summing the weights listed.
If you need the design or create script (table layout), please let me know.
Thanks.
Are there any limitations or gotchas to updating the same table whichfired a trigger from within the trigger?Some example code below. Hmmm.... This example seems to be workingfine so it must be something with my specific schema/code. We'reworking on running a SQL trace but if anybody has any input, fireaway.Thanks!create table x(Id int,Account varchar(25),Info int)GOinsert into x values ( 1, 'Smith', 15);insert into x values ( 2, 'SmithX', 25);/* Update trigger tu_x for table x */create trigger tu_xon xfor updateasbegindeclare @TriggerRowCount intset @TriggerRowCount = @@ROWCOUNTif ( @TriggerRowCount = 0 )returnif ( @TriggerRowCount > 1 )beginraiserror( 'tu_x: @@ROWCOUNT[%d] Trigger does not handle @@ROWCOUNT[color=blue]> 1 !', 17, 127, @TriggerRowCount) with seterror, nowait[/color]returnendupdate xsetAccount = left( i.Account, 24) + 'X',Info = i.Infofrom deleted, inserted iwhere x.Account = left( deleted.Account, 24) + 'X'endupdate x set Account = 'Blair', Info = 999 where Account = 'Smith'
View 1 Replies View RelatedThis Audit Trigger is Generic (i.e. non-"Table Specific") attach it to any tabel and it should work. Be sure and create the 'Audit' table first though.
The following code write audit entries to a Table called
'Audit'
with columns
'ActionType' //varchar
'TableName' //varchar
'PK' //varchar
'FieldName' //varchar
'OldValue' //varchar
'NewValue' //varchar
'ChangeDateTime' //datetime
'ChangeBy' //varchar
using System;
using System.Data;
using System.Data.SqlClient;
using Microsoft.SqlServer.Server;
public partial class Triggers
{
//A Generic Trigger for Insert, Update and Delete Actions on any Table
[Microsoft.SqlServer.Server.SqlTrigger(Name = "AuditTrigger", Event = "FOR INSERT, UPDATE, DELETE")]
public static void AuditTrigger()
{
SqlTriggerContext tcontext = SqlContext.TriggerContext; //Trigger Context
string TName; //Where we store the Altered Table's Name
string User; //Where we will store the Database Username
DataRow iRow; //DataRow to hold the inserted values
DataRow dRow; //DataRow to how the deleted/overwritten values
DataRow aRow; //Audit DataRow to build our Audit entry with
string PKString; //Will temporarily store the Primary Key Column Names and Values here
using (SqlConnection conn = new SqlConnection("context connection=true"))//Our Connection
{
conn.Open();//Open the Connection
//Build the AuditAdapter and Mathcing Table
SqlDataAdapter AuditAdapter = new SqlDataAdapter("SELECT * FROM Audit WHERE 1=0", conn);
DataTable AuditTable = new DataTable();
AuditAdapter.FillSchema(AuditTable, SchemaType.Source);
SqlCommandBuilder AuditCommandBuilder = new SqlCommandBuilder(AuditAdapter);//Populates the Insert command for us
//Get the inserted values
SqlDataAdapter Loader = new SqlDataAdapter("SELECT * from INSERTED", conn);
DataTable inserted = new DataTable();
Loader.Fill(inserted);
//Get the deleted and/or overwritten values
Loader.SelectCommand.CommandText = "SELECT * from DELETED";
DataTable deleted = new DataTable();
Loader.Fill(deleted);
//Retrieve the Name of the Table that currently has a lock from the executing command(i.e. the one that caused this trigger to fire)
SqlCommand cmd = new SqlCommand("SELECT object_name(resource_associated_entity_id) FROM
ys.dm_tran_locks WHERE request_session_id = @@spid and resource_type = 'OBJECT'", conn);
TName = cmd.ExecuteScalar().ToString();
//Retrieve the UserName of the current Database User
SqlCommand curUserCommand = new SqlCommand("SELECT system_user", conn);
User = curUserCommand.ExecuteScalar().ToString();
//Adapted the following command from a T-SQL audit trigger by Nigel Rivett
//http://www.nigelrivett.net/AuditTrailTrigger.html
SqlDataAdapter PKTableAdapter = new SqlDataAdapter(@"SELECT c.COLUMN_NAME
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = '" + TName + @"'
and CONSTRAINT_TYPE = 'PRIMARY KEY'
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME", conn);
DataTable PKTable = new DataTable();
PKTableAdapter.Fill(PKTable);
switch (tcontext.TriggerAction)//Switch on the Action occuring on the Table
{
case TriggerAction.Update:
iRow = inserted.Rows[0];//Get the inserted values in row form
dRow = deleted.Rows[0];//Get the overwritten values in row form
PKString = PKStringBuilder(PKTable, iRow);//the the Primary Keys and There values as a string
foreach (DataColumn column in inserted.Columns)//Walk through all possible Table Columns
{
if (!iRow[column.Ordinal].Equals(dRow[column.Ordinal]))//If value changed
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "U";//U for Update
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the entry
}
}
break;
case TriggerAction.Insert:
iRow = inserted.Rows[0];
PKString = PKStringBuilder(PKTable, iRow);
foreach (DataColumn column in inserted.Columns)
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "I";//I for Insert
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = null;
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
case TriggerAction.Delete:
dRow = deleted.Rows[0];
PKString = PKStringBuilder(PKTable, dRow);
foreach (DataColumn column in inserted.Columns)
{
//Build and Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "D";//D for Delete
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = null;
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
default:
//Do Nothing
break;
}
AuditAdapter.Update(AuditTable);//Write all Audit Entries back to AuditTable
conn.Close(); //Close the Connection
}
}
//Helper function that takes a Table of the Primary Key Column Names and the modified rows Values
//and builds a string of the form "<PKColumn1Name=Value1>,PKColumn2Name=Value2>,......"
public static string PKStringBuilder(DataTable primaryKeysTable, DataRow valuesDataRow)
{
string temp = String.Empty;
foreach (DataRow kColumn in primaryKeysTable.Rows)//for all Primary Keys of the Table that is being changed
{
temp = String.Concat(temp, String.Concat("<", kColumn[0].ToString(), "=", valuesDataRow[kColumn[0].ToString)].ToString(), ">,"));
}
return temp;
}
}
The trick was getting the Table Name and the Primary Key Columns.
I hope this code is found useful.
Comments and Suggestion will be much appreciated.