how to check for new table entry in MySql?
I need to automate the task in java so every time a new row added to the table the scrip that I am writing give me alert.
You can use an INSERT trigger.
Here is a Stackoverflow article: SQL Server 2008 - Help writing simple INSERT Trigger
you can refer link below for you reference
http://solutioncenter.apexsql.com/get-an-alert-when-a-certain-record-changes/
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I need when I create a new table, insert it with the name of the table in another already existing table. I had planned to use a trigger, but I can not find documentation on how to do this. Do you have any idea?
Thank you!
There's nothing in MySQL allowing the definition of a trigger to fire upon table creation, sorry to say.
A trigger is something that happens automatically based on an event in the database. Typically speaking, it’s not a good idea to be creating tables automatically like this. What was your thinking around wanting a table to be created automatically by an event? Normally triggers would be adding or changing individual rows in a DB.
Documentation for mysql triggers can be found at https://dev.mysql.com/doc/refman/5.7/en/trigger-syntax.html
I am new to MySQL and I have created a table which I named 'adb_history' that keeps track of the changes made from the main table 'adb'. It was implemented successfully thanks to the creation of triggers (update, insert, delete). The idea is that there will be two or more users (admins) that can manipulate the table. So I am thinking of creating a new column to also track/add the user (that is, log the user name from the server) that made the changes/updates. Can this be done? My workbench version is 5.6. Thanks for the help!
Yes this can be done, simply insert CURRENT_USER().
See documentation for more information on the function.
Edit : To answer your comment, it would look something like this :
INSERT INTO adb_history VALUES (value1, value2, valueN, CURRENT_USER());
MySQL has this incredibly useful yet proprietary record holding the "new row"(NEW).
I wonder if there is any SQL server command to replace the New in MySQL.
In mysql, in a trigger, I would use something like this.
INSERT INTO products(idProduct,idReference,date)
VALUES (NEW.idProduct,idReference,NOW());
However I don't know how if is it possible to do the same command but in Sql Server.
I hope I have been clear in my question.
If not explicit, or if it isn't possible to implement what I want, I apologize.
Thank you all.
In your trigger
INSERT products(idProduct,idReference,date)
SELECT idProduct, idReference, GETDATE()
FROM inserted
new is only available in a trigger if I'm not mistaken.
As SQL Server uses statement-level triggers and MySQL uses row-level triggers there is not direct equivalent to the concept of "the new row" in a trigger. Read the documentation on the inserted virtual table that is available in SQL Server.
Example usage: SQL Insert trigger to update INSERTED table values
I am regular user of MS-SQL but now working on a project which has mysql as a back-end.
Please tell me that is there exists such a inserted/Deleted tables (Magic tables) in mysql which I can use inside trigger or in normal queries.
They are called NEW and OLD in MySQL.
NEW is the new record to be inserted or the updated data.
OLD is the deleted record, or the old data before an update.
See the documentation for creating a trigger here: http://dev.mysql.com/doc/refman/5.0/en/create-trigger.html
Can I use a trigger in MySQL to create a new database when a value is inserted into another database.
There is definitely a design problem in why you want to do this. (Create a database in trigger). As it turns out this is not allowed. This is a list of what all is allowed to be placed in a trigger.