For insuring the robustness and high - efficiency of ett utility program , pipeline technology with logical condition of power builder and time - marker table created in data warehouse are adopted while designing and developing ett utility program 為了確保ett實用程序的健壯性和高效性以及數(shù)據(jù)倉庫中數(shù)據(jù)的一致性和完整性,在ett實用程序的設計開發(fā)過程中采用了powerbuilder具有邏輯限制條件的數(shù)據(jù)管道技術,并在數(shù)據(jù)倉庫中設置了時間標記表和數(shù)字標記表。