trigger for delete insert and update

IF NOT EXISTS(SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME= 'Audit')
CREATE TABLE LogTable
(
LogID [int]IDENTITY(1,1) NOT NULL,
Type char(1),
TableName varchar(128),
PrimaryKeyField varchar(1000),
PrimaryKeyValue varchar(1000),
FieldName varchar(128),
OldValue varchar(1000),
NewValue varchar(1000),
UpdateDate datetime DEFAULT (GetDate()),
UserName varchar(128)
)
GO

DECLARE @sql varchar(8000), @TABLE_NAME sysname
SET NOCOUNT ON

SELECT @TABLE_NAME= MIN(TABLE_NAME)
FROM INFORMATION_SCHEMA.Tables
WHERE
--query for table that you want to audit
TABLE_TYPE= 'BASE TABLE'
AND TABLE_NAME!= 'sysdiagrams'
AND TABLE_NAME!= 'LogTable'
AND TABLE_NAME!= 'one table to not record de log';

WHILE @TABLE_NAME IS NOT NULL
BEGIN

SELECT 'PROCESANDO ' + @TABLE_NAME;

EXEC('IF OBJECT_ID (''' + @TABLE_NAME+ '_ChangeTracking'', ''TR'') IS NOT NULL DROP TRIGGER ' + @TABLE_NAME+ '_ChangeTracking')

SELECT @sql = 'create trigger ' + @TABLE_NAME+ '_ChangeTracking on ' + @TABLE_NAME+ ' for insert, update, delete
as
declare
@bit int ,
@field int ,
@maxfield int ,
@char int ,
@fieldname varchar(128) ,
@TableName varchar(128) ,
@PKCols varchar(1000) ,
@sql varchar(2000),
@UpdateDate varchar(21) ,
@UserName varchar(128) ,
@Type char(1) ,
@PKFieldSelect varchar(1000),
@PKValueSelect varchar(1000)

select @TableName = ''' + @TABLE_NAME+ '''

-- date and user
select @UserName = system_user ,
@UpdateDate = convert(varchar(8), getdate(), 112) + '' '' + convert(varchar(12), getdate(), 114)

-- Action
if exists (select * from inserted)
if exists (select * from deleted)
select @Type = ''U''
else
select @Type = ''I''
else
select @Type = ''D''

-- get list of columns
select * into #ins from inserted
select * into #del from deleted

-- Get primary key columns for full outer join
select @PKCols = coalesce(@PKCols + '' and'', '' on'') + '' i.'' + c.COLUMN_NAME + '' = d.'' + c.COLUMN_NAME
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = @TableName
and CONSTRAINT_TYPE = ''PRIMARY KEY''
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME

-- Get primary key fields select for insert(comma deparated)
select @PKFieldSelect = coalesce(@PKFieldSelect+''+'','''') + '''''''' + COLUMN_NAME + '',''''''
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = @TableName
and CONSTRAINT_TYPE = ''PRIMARY KEY''
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME

-- Get primary key values for insert(comma deparated as varchar)
select @PKValueSelect = coalesce(@PKValueSelect+''+'','''') + ''convert(varchar(100), coalesce(i.'' + COLUMN_NAME + '',d.'' + COLUMN_NAME + ''))'' + ''+'''',''''''
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = @TableName
and CONSTRAINT_TYPE = ''PRIMARY KEY''
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME

if @PKCols is null
begin
raiserror(''no PK on table %s'', 16, -1, @TableName)
return
end

select @sql = ''insert LogTable(Type, TableName, PrimaryKeyField, PrimaryKeyValue, UserName)''
select @sql = @sql + '' select '''''' + @Type + ''''''''
select @sql = @sql + '','''''' + @TableName + ''''''''
select @sql = @sql + '','' + @PKFieldSelect
select @sql = @sql + '','' + @PKValueSelect
select @sql = @sql + '','''''' + @UserName + ''''''''

select @sql = @sql + '' from #ins i full outer join #del d''
select @sql = @sql + @PKCols

exec (@sql)
';
SELECT @sql
EXEC(@sql)

SELECT @TABLE_NAME= MIN(TABLE_NAME) FROM INFORMATION_SCHEMA.Tables
WHERE TABLE_NAME> @TABLE_NAME
--query for table that you want to audit
AND TABLE_TYPE= 'BASE TABLE'
AND TABLE_NAME!= 'sysdiagrams'
AND TABLE_NAME!= 'LogTable'
AND TABLE_NAME!= 'one table to not record de log';
END