Multiple users logging into a database

I'm developing an application in ASP.Net that uses SQLServer. The database person in the team wants to have each user have a seperate login to the database so he can tell who has done what changes in the database. Is this a good practice? Or are their performance\security issues with this model?For system performance it is better to use one account (to use one connection string) and connection pooling. My solution is as follows. Create your own users and log-in system. You can save current username or id to Session. Then create a table system_events to your database. Everytime user makes something you can insert a new row that describes user action. Also, and it is maybe even better, you can use plain text logs for this.|||We implemented this feature and what we did was write a stored procedure to check the old value against the new values being updated in the database and then it writes only the changes to a seperate table designed for tracking changes. We then wrote a page to display change history by date range in a D-Grid. It works very well and there has been no noticable performance hit since implementation.

CREATE PROCEDURE AddChangeHistory
(
@.propertyID INT,
@.userName VARCHAR(75), --Assigned in session when a user logins
@.tableName VARCHAR(75),
@.fieldName VARCHAR(80),
@.fieldChangeVal varchar(200)
)
AS
DECLARE @.fieldInitVal varchar(200)
BEGIN TRAN
CREATE TABLE #tempVal
(
fieldInitVal VARCHAR(200)
)
INSERT INTO #tempVal exec('SELECT TOP 1 ' + @.fieldName + ' FROM ' + @.tableName + ' WHERE propertyID=' + @.propertyID + '')
SELECT @.fieldInitVal = (SELECT top 1 * FROM #tempVal)
DROP TABLE #tempVal
IF(LOWER(@.fieldInitVal) <> LOWER(@.fieldChangeVal))
BEGIN
INSERT INTO ChangeHistory(propertyID, userName, tableName, fieldName, fieldInitVal, fieldChangeVal)
VALUES (@.propertyID, @.userName, @.tableName, @.fieldName, @.fieldInitVal, @.fieldChangeVal)
END
IF(@.@.ERROR <> 0)
BEGIN
ROLLBACK TRAN
END
ELSE
BEGIN
COMMIT TRAN
END
GO

SPROC to update my database

CREATE PROCEDURE dbo.oPK_UpdateAdminHours
(
@.Role AS varchar(100),
@.UserName AS varchar(100),
@.vcManager AS varchar(50),
@.vcAssistant1 AS varchar(50),
@.vcAssistant2 AS varchar(50),
@.vcLeasingManager AS varchar(50),
@.vcMarketingDirector AS varchar(50),
@.vcLeasing1 AS varchar(50),
@.vcLeasing2 AS varchar(50),
@.vcLeasing3 AS varchar(50),
@.vcLeasing4 AS varchar(50),
@.vcLeasing5 AS varchar(50),
@.bMon_Fri AS bit,
@.cDisplaySummer_Winter AS char(1),
@.vcOfficeHoursSummerMon AS varchar(25),
@.vcOfficeHoursWinterMon AS varchar(25),
@.vcOfficeHoursSummerTue AS varchar(25),
@.vcOfficeHoursWinterTue AS varchar(25),
@.vcOfficeHoursSummerWed AS varchar(25),
@.vcOfficeHoursWinterWed AS varchar(25),
@.vcOfficeHoursSummerThur AS varchar(25),
@.vcOfficeHoursWinterThur AS varchar(25),
@.vcOfficeHoursSummerFri AS varchar(25),
@.vcOfficeHoursWinterFri AS varchar(25),
@.vcOfficeHoursSummerSat AS varchar(25),
@.vcOfficeHoursWinterSat AS varchar(25),
@.vcOfficeHoursSummerSun AS varchar(25),
@.vcOfficeHoursWinterSun AS varchar(25),
@.vcTimeZone AS varchar(50),
@.PropertyID AS INT
)
AS
--Calling the AddChangeHistory SPROC to check the values before updating the Database
exec AddChangeHistory @.propertyID, @.userName, 'vcManager',@.vcManager
exec AddChangeHistory @.propertyID, @.userName, 'vcAssistant1',@.vcAssistant1
exec AddChangeHistory @.propertyID, @.userName, 'vcAssistant2',@.vcAssistant2
exec AddChangeHistory @.propertyID, @.userName, 'vcLeasingManager',@.vcLeasingManager
exec AddChangeHistory @.propertyID, @.userName, 'vcMarketingDirector',@.vcMarketingDirector
exec AddChangeHistory @.propertyID, @.userName, 'vcLeasing1',@.vcLeasing1
exec AddChangeHistory @.propertyID, @.userName, 'vcLeasing2',@.vcLeasing2
exec AddChangeHistory @.propertyID, @.userName, 'vcLeasing3',@.vcLeasing3
exec AddChangeHistory @.propertyID, @.userName, 'vcLeasing4',@.vcLeasing4
exec AddChangeHistory @.propertyID, @.userName, 'vcLeasing5',@.vcLeasing5
exec AddChangeHistory @.propertyID, @.userName, 'bMon_Fri',@.bMon_Fri
exec AddChangeHistory @.propertyID, @.userName, 'cDisplaySummer_Winter',@.cDisplaySummer_Winter
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursSummerMon',@.vcOfficeHoursSummerMon
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursWinterMon',@.vcOfficeHoursWinterMon
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursSummerTue',@.vcOfficeHoursSummerTue
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursWinterTue',@.vcOfficeHoursWinterTue
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursSummerWed',@.vcOfficeHoursSummerWed
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursWinterWed',@.vcOfficeHoursWinterWed
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursSummerThur',@.vcOfficeHoursSummerThur
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursWinterThur',@.vcOfficeHoursWinterThur
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursSummerFri',@.vcOfficeHoursSummerFri
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursWinterFri',@.vcOfficeHoursWinterFri
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursSummerSat',@.vcOfficeHoursSummerSat
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursWinterSat',@.vcOfficeHoursWinterSat
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursSummerSun',@.vcOfficeHoursSummerSun
exec AddChangeHistory @.propertyID, @.userName, 'vcOfficeHoursWinterSun',@.vcOfficeHoursWinterSun
exec AddChangeHistory @.propertyID, @.userName, 'vcTimeZone ',@.vcTimeZone
--Put your Update code here (removed for space)

Hope this helps.|||Thank you so much. That is what I needed.