sql-server - filtering duplicate string in database

Question

My application sends bulk messages to customers. What I want is:

1.Application should not accept more than 10 duplicate message per day. 2.should be checked for same sender, same number and on same message.

How can i do it in database? The sent message details are saved in a table and it has columns to store sender id, mobile no, message and datetime

Before insertion, the condition should be checked.

please help me out.

Answer 1

您可以在表上创建触发器以对其进行验证，或者在插入之前通过查询检查 UI。