select a house ,and then select ''upgrade''是什么意思?

select a house ,and then select ''upgrade''是什么意思? select a house,andthen selectupgrade. sql里,where a in (select .) and b in (select .)这种表示合法吗? a building and a house 哪个高 select a versino,piease! Select a username是什么意思 to select a Select a country是什么意思 Select a password是什么意思? select and choose的分别 and select 4718 fromselect count 这句话怎么翻译,Select,develop and manage a highly competent and motivated staff of employees. SELECT Please select a language first. select a Number 谁知道啊 Please select a valid date. 英语翻译Reboot and Select proper boot devieor Insert boot Media in selected boot devie and press a key! select * from a union select * from b 能详细说下么