ค่าสูงสุดที่เสร็จสมบูรณ์สำหรับ delta bessborough คือเท่าใด ไม่จำเป็นต้องใช้ตารางทั้งหมด
what is the maximum completed for delta bessboroughIt is not neccessary to use all the tables.
 table_18073:  "Rank" [ real]  "Building" [ text]  "Address" [ text]  "Height" [ text]  "Storeys" [ real]  "Completed" [ real] 
SELECT MAX("Completed") FROM table_18073 WHERE "Building" = 'Delta Bessborough'