Trigger and INSERTED AND DELETED table https://stackoverflow.com/questions/12923221/mysql-trigger-using-logical-inserted-table-to-insert-into-another-table SQL DB 2018.11.09
LOGIN VS USER https://www.linkedin.com/pulse/sql-server-difference-between-login-user-subhamoy-ghosh SQL DB 2018.11.09
Importing csv data https://support.discountasp.net/kb/a1179/how-to-import-a-csv-file-into-a-database-using-sql-server-management-studio.aspx SQL DB 2018.11.09