您好我需要小的查询这里是我的表SQL查询需要帮助
user table
userid username
user001 987
user002 123
user003 456
logintrack
usrid lastlogin
user001 7/22/2009
user001 7/23/2009
user002 7/24/2009
user001 7/25/2009
user003 7/26/2009
user002 7/25/2009
user001 7/26/2990
Expected Output
userid username lastlogin
user001 987 7/26/2009
user002 123 7/25/2009
user003 456 7/26/2009
问候, 纳古
您忘记发布您遇到问题的SQL。 – 2009-07-27 10:23:15