Which used when we want to perform an insert update or DELETE operation?
The ‘ExecuteNonQuery’ method is used in C# to issue any DML statements (insert, delete and update operation) against the database.
How do you create a trigger on a insert update DELETE of a table?
The CREATE TRIGGER statement allows you to create a new trigger that is fired automatically whenever an event such as INSERT , DELETE , or UPDATE occurs against a table. In this syntax: The schema_name is the name of the schema to which the new trigger belongs. The schema name is optional.
What is INSERT UPDATE and DELETE?
The INSERT statement is used to add new rows to a table. The UPDATE statement is used to edit and update the values of an existing record. The DELETE statement is used to delete records from a database table.
How to determine if SQL Server INSERT UPDATE trigger?
After comment, this answer is only for INSERTED and UPDATED triggers. CREATE TRIGGER dbo.TableName_IUD ON dbo.TableName AFTER INSERT, UPDATE, DELETE AS BEGIN SET NOCOUNT ON; — — Check if this is an INSERT, UPDATE or DELETE Action. — DECLARE @action as char (1); SET @action = ‘I’; — Set Action to Insert by default.
How to determine if the trigger is executed for an update or insert?
How would I determine if the trigger is executed for an update or insert. Triggers have special INSERTED and DELETED tables to track “before” and “after” data. So you can use something like IF EXISTS (SELECT * FROM DELETED) to detect an update. You only have rows in DELETED on update, but there are always rows in INSERTED.
How to create an oracle trigger that runs after an update?
Trying to create an Oracle trigger that runs after a table is updated in any way. I’ve been googling this all morning and came up with this:
How to determine if insert or update exists?
IF EXISTS(SELECT * FROM DELETED) BEGIN SET @action = CASE WHEN EXISTS(SELECT * FROM INSERTED) THEN ‘U’ — Set Action to Updated. ELSE ‘D’ — Set Action to Deleted. END END ELSE IF NOT EXISTS(SELECT * FROM INSERTED) RETURN; — Nothing updated or inserted.