Where can I find triggers in Sybase?

Where can I find triggers in Sybase?

In order to find all triggers on a table (select, delete, insert and update triggers), you can use the stored procedure sp_depends: 1> sp_depends tablename 2> go Things inside the current database that reference the object.

What are triggers in Sybase?

Sybase triggers are your data enforcers A trigger consists of an event (an INSERT, DELETE, or UPDATE statement issued against an associated table) and an action (the related procedure). Triggers are used to preserve data integrity by checking on or changing data in a consistent manner.

What is trigger in sql?

A SQL trigger is a database object which fires when an event occurs in a database. We can execute a SQL query that will “do something” in a database when a change occurs on a database table such as a record is inserted or updated or deleted. For example, a trigger can be set on a record insert in a database table.

What is view in Sybase?

A view is an alternative way of looking at the data in one or more tables. A view is derived from one or more real tables for which the data is physically stored in the database. The tables from which a view is derived are called its base tables or underlying tables. A view can also be derived from another view.

How do I create a trigger in Sybase?

create trigger [owner.] trigger_name on [owner.] table_name {for {insert , update} | instead of {insert, update, delete}} [as [if update (column_name) [{and | or} update (column_name)]…] SQL_statements [if update (column_name) [{and | or} update (column_name)]…

What are types of trigger?

What are the types of triggers?

• DDL Trigger.
• DML Trigger.
• Logon Trigger.

What are trigger concepts?

A trigger is a special type of stored procedure that automatically runs when an event occurs in the database server. DML triggers run when a user tries to modify data through a data manipulation language (DML) event. DML events are INSERT, UPDATE, or DELETE statements on a table or view.

How does a view work?

A view is a virtual table whose contents are defined by a query. Like a table, a view consists of a set of named columns and rows of data. Unless indexed, a view does not exist as a stored set of data values in a database.

How do I create a view in Sybase?

Creating views from SQL-derived tables

1. To create a view using a SQL-derived table, add the derived table expression in the from clause of the select part of the create view statement (see Example 11).
2. A view created using a SQL-derived table can be updated if the derived table expression can be updated.

Can only use if update within a create trigger?

You cannot use IF UPDATE in annonymous T-SQL block, IF UPDATE is reserved for triggers, becasue it only checks if a user’s statement that invoked the trigger updates particular column. So it does not make too much sense in your code. The IF UPDATE statement makes no sense in the context you want to use it.

How many types of triggers are there?

In SQL Server we can create four types of triggers Data Definition Language (DDL) triggers, Data Manipulation Language (DML) triggers, CLR triggers, and Logon triggers.

What are the two types of triggers?

There are two types of triggers.

• BEFORE trigger: – This trigger is called before the execution of the DML statement.
• After Trigger: – this trigger is called after once DML statement is executed.
• Combination of triggers: – We can have combination of row, statement, BEFORE and AFTER triggers.