发简信
IP属地：北京
Row level data to Column level using CASE statement SELECT TRUNC(SALES_D...
1. 100颗松果和松鼠的家距离100米,松鼠每次最多只能搬运50个松果,松鼠比较贪吃,每走2米要吃掉一颗松果,请问松鼠最多能搬回家多少松果? ...
Analytical Function SELECT SALES_DATE, ORDER_ID, PRODUCT_ID, SALES_AMOUN...