问题
Lately I asked the question How can I use PIVOT to show simultaneous average and count in its cells?
The question is answered for SQL-Server (2005+) and Oracle (11g +)
Obviously the sql-server implementation is rather limited and Oracle implementation yields strange column names.
Are these independent solutions or are there based on some ANSI-standards?
回答1:
It isn't in ANSI-92.
The later versions are not freely available (as far as I can tell) except a draft SQL:2003. Also not mentioned
Note: neither pivot nor cross-tab are mentioned
来源：https://stackoverflow.com/questions/4842726/is-there-an-ansi-specification-for-the-pivot-statement