ALTER TABLE statement against remote tables

triggers defined on proxy tables

SQL Remote

foreign keys that refer to remote tables

READTEXT, WRITETEXT, and TEXTPTR functions

positioned UPDATE and DELETE statements

UPDATE and DELETE statements requiring an intermediate temporary table

backward scrolling on cursors opened against remote data. Fetch statements must be NEXT or RELATIVE 1

calls to functions that contain an expression that references a proxy table

If a column on a remote table has a name that is a keyword on the remote server, you cannot access data in that column. You can execute a CREATE EXISTING TABLE statement, and import the definition but you cannot select that column.