CTJ Citizens for Tax Justice Customs and Border Protection Department of Homeland Security, CBP, Logistics, Regulations, Delcan Delcan is a multidisciplinary engineering, planning, management and technology firm that provides a broad range of integrated systems and infrastructure solutions.A CTE is similar to a derived table in that it is not stored as an object and lasts only for the duration of the query. In SQL Server Transact-SQL, a temporary named result set defined within the execution scope of a single SELECT, INSERT, UPDATE, DELETE, or CREATE VIEW statement.