I am working on a database used by separate applications. One of these applications is updating two fields in a table but I can't work out what one and don't have the source code for all the applications.
I am wondering if it is possible to write a log (to another table or elsewhere) to what the last update statement made against the table in question was. E.g. to record all SQL that has attempted to update the table automatically...
create a trigger before update on this table. Also create a new table. In that trigger store values before and after update in to a newly created table
Related
I'm wondering if there is any way to copy data from a view to a table in the same database. To be more clear, I have a view called AUTHORS_VIEW and a table called AUTHORS_TABLE. AUTHORS_VIEW takes data from others table in others databases.
I would copy new records in AUTHORS_VIEW not yet existing in AUTHORS_TABLE, update records in AUTHORS_VIEW not yet updated in AUTHORS_TABLE and remove record flagged as Removed in AUTHORS_VIEW from AUTHORS_TABLE.
Is it possible to achieve this with a trigger or others tool? I'm newbie with SQL Server.
This is my AUTHORS_VIEW (AUTHORS_TABLE is identical):
I have created a table in SQL by copying data from another table in a different database. How can I make the changes made in the old table get reflected in the new table automatically?
You can use a Trigger function to reflect the changes.
Refer this.
Given that you have access over the First table, Trigger would work fine.
I have never used triggers in PLSQL before, but I am now supposed to make a trigger that replicates the table of one database, and creates a copy of this table in another database. I am using AQT(Advanced Query Tool) as DBMS, and i have 2 database connections, and I need to copy the table and or data from DB1 to DB2. It's only based on one table that I need replicated, following tutorialspoint I have concluded that it should look somewhat like this:
`
CREATE OR REPLACE TRIGGER db_transfer
AFTER DELETE OR INSERT OR UPDATE ON X
WHEN (NEW.ID > 0)
I don't think i need for each since i want a copy of the whole table, and the condition is supposed to trigger this replication of the DB table. Is this the right approach?
EDIT
For anyone who uses AQT, they have a feature under Create -> Trigger -> and then click on the relevant tables etc to create it.
I want to create a new table with one of the columns linked/updated by a table on another database (but on the same server).
so when table A column is updated it will automatically update table b's column with the same information no data will be entered into this column from table b.
I have tried various different ways but can't find a way to do this with out updating column manually or setting up a server agent any help would be great.
if you want to make cross server query, please check sp_addlinkedserver
https://msdn.microsoft.com/en-us/library/ms190479.aspx
Once it is linked, just create a trigger, where you can use
select * from [server].[database].[schema].[table]
I have a table in SQL Server but there is no column to show when the value is inserted into the table. And also I don't want to create a one.
Is there a way that I can find the time and date when some one has inserted a row into a SQL Server 2008 table or when it is updated?
If you don't want to modify your existing tables, the only way to go is to create another table to log the activities to. Then you can use ON INSERT / ON UPDATE triggers on the source tables and log the time and date of inserts and updates to the log table.
You can use On Insert and On Update Triggers in sql server 2005/2008 and your required fields are available in inserted and updated tables, but if you need to use this information later need to add a new table and log your information on to that!
I myself for doing such stuff like this always add 2 column to my tables
LastActivityBy relation to user table
and
LastActivityOn datetime
so you don't need to use any other table.
If you dont want to alter your existing schema, create a audit table and create trigger on source table to update audit table.