SQL Differences between stored procedure and triggers

Question

I\'m having trouble understanding the difference between a stored procedure and a trigger in sql. If someone could be kind enough to explain it to me that would be great.

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Answer 1

Both are database objects containing blocks lof code that can be used for implementing business logic

The differences are:

1) Triggers fire automatically but they need events for that. (Example: create,alter,drop,insert,delete,update) .

2) Procedures have to be explicitly called and then executed. They do not need create,alter,drop,insert,delete,update. we can also execute procedures automatically using the sp_procoption.

3) we cannot pass parameters inside the triggers,

but we can pass parameters inside stored procedures

example: if we want to display a message "error"

using a trigger: we need some DDL/DML Statement using a procedure: NO DDL/DML is needed