Can we use DDL in trigger?

DDL triggers cannot be used as INSTEAD OF triggers. DDL triggers do not fire in response to events that affect local or global temporary tables and stored procedures. DDL triggers do not create the special inserted and deleted tables.

Can we ALTER trigger?

Yes, that is right, just use ALTER . If you right-click on your trigger in Object Explorer in SSMS and select Script Trigger as/ALTER To, you will see the ALTER statement created for your trigger.

How do I change permissions on a database?

Procedure

1. From the Start menu, select Programs > SQL Management Studio.
2. Select Microsoft SQL Server.
3. Select your server name and expand.
4. Select Security.
5. Right-click on Logins and select New.
6. To set permissions, double-click the user account and do one of the following:
7. Change the default database to GentranDatabase .

How do you modify a trigger?

To modify a DML trigger

1. In Object Explorer, connect to an instance of Database Engine and then expand that instance.
2. Expand the database that you want, expand Tables, and then expand the table that contains the trigger that you want to modify.
3. Expand Triggers, right-click the trigger to modify, and then click Modify.

Can we use DDL in trigger in Oracle?

In Oracle, any DDL command issues two commits, one before and one after the DDL statement is executed. So, to execute DDL in a trigger we must use the autonomous_transaction pragma , which means the DDL runs in a separate, nested transaction.

Is trigger DDL or DML?

A DDL trigger executes in response to a change to the structure of a database (for example, CREATE, ALTER, DROP). A DML trigger executes in response to a change in data (INSERT, UPDATE, DELETE).

Can we alter trigger in MySQL?

As @Jocelyn mentioned you can’t alter the trigger. But if you’re using MySql Workbench it will allow you to alter the trigger. Just right click on your table name and click Alter table option from there you can pick Trigger option and alter it. Although you cannot perform it from query.

How do I modify a trigger in Oracle?

Use the ALTER TRIGGER statement to enable, disable, or compile a database trigger. Note: This statement does not change the declaration or definition of an existing trigger. To redeclare or redefine a trigger, use the CREATE TRIGGER statement with the OR REPLACE keywords.

How do I grant permission to ALTER a table in SQL Server?

Click the Permissions tab and configure the permissions for the table:

1. Click Grant.
2. Double-click a user or group.
3. In the permissions table, click the fields beside the user or group to set specific permissions.
4. Select a user and click Change to set specific permissions for a columns.
5. Click OK.

How do I grant permission to SQL Server database?

Login to SQL Server Management Studio. In Object Explorer on the left pane, expand the Databases folder and select the concerned database and navigate to the by expanding Security and Users folders. Right-click the User to which you want to GRANT or REVOKE the permissions.

How do you modify an existing trigger in Oracle?

How do I edit an existing trigger in MySQL?

To modify an existing trigger, double-click the node of the trigger to modify, or right-click this node and choose the Alter Trigger command from the context menu. Either of the commands opens the SQL Editor.

Why we use DDL trigger in Oracle?

DDL triggers: Using the Data Definition Language (DDL) triggers, the Oracle DBA can automatically track all changes to the database, including changes to tables, indexes, and constraints. The data from this trigger is especially useful for change control for the Oracle DBA.

What is a DDL trigger?

SQL Server DDL triggers are specifically used to control and review the changes taking place in the database. These triggers can be used to put the limit on the unauthorized clients to make DDL type of changes such as DROP VIEW, DROP PROCEDURE, DROP Function and so on using DDL Trigger.

What is DDL trigger in Oracle?

How do I edit a trigger in SQL Developer?

To change a trigger, use either the SQL Developer tool Edit or the DDL statement CREATE TRIGGER with the OR REPLACE clause. To change a trigger using the Edit tool: In the Connections frame, expand hr_conn. In the list of schema object types, expand Triggers.

How are permissions implemented in MySQL?

In MySQL, the user permissions are granted to the MySQL user account which determines operations that can be performed in the server. These user permissions may differ in the levels of privileges in which they are applied for several query executions.

How do I give a user a DDL privilege in SQL Server?

What is ALTER permission in SQL Server?

When granted on a scope, ALTER also bestows the ability to alter, create, or drop any securable that is contained within that scope. For example, ALTER permission on a schema includes the ability to create, alter, and drop objects from the schema.

How do I grant permission to alter a table in SQL Server?

How do I alter a DML or DDL trigger?

To alter a DML trigger requires ALTER permission on the table or view on which the trigger is defined. To alter a DDL trigger defined with server scope (ON ALL SERVER) or a logon trigger requires CONTROL SERVER permission on the server.

How do I alter a DDL trigger defined with database scope?

To alter a DDL trigger defined with database scope (ON DATABASE) requires ALTER ANY DATABASE DDL TRIGGER permission in the current database. The following example creates a DML trigger in the AdventureWorks 2012 database, that prints a user-defined message to the client when a user tries to add or change data in the SalesPersonQuotaHistory table.

Where are DDL triggers stored in a database?

You can query sys.triggers within the database context in which the triggers are created or by specifying the database name as an identifier, such as master.sys.triggers. Server-scoped DDL triggers are stored as objects in the master database.

Can a DDL trigger fire in response to a database event?

For example, a DDL trigger created to fire in response to a CREATE_TABLE event can do so whenever a CREATE_TABLE event occurs in the database, or on the server instance. A DDL trigger created to fire in response to a CREATE_LOGIN event can do so only when a CREATE_LOGIN event occurs in the server instance.