OVER()

PostgreSQL ROW_NUMBER() OVER()的用法说明

语法： ROW_NUMBER() OVER( [ PRITITION BY col1] ORDER BY col2[ DESC ] ) 解释： ROW_NUMBER()为返回的记录定义个行编号， PARTITION BY col1 是根据col1分组，ORDER BY col2[ DESC ]是根据col2进行排序。[详细]