sql%NOTFOUND --update,delete操作时没找到符合条件的记录。
sql%FOUND --SELECT columnname INTO ，update,delete找到符合条件的记录Top
sql%rowcount --判定当前更新记录数
sql%isopen --判定当前游标是否打开Top
%FOUND
This attribute yields TRUE if an INSERT, UPDATE, or DELETE statement affected one or more rows or a SELECT INTO statement returned one or more rows. Otherwise, it yields FALSE.
%ISOPEN
This attribute always yields FALSE because Oracle closes the SQL cursor automatically after executing its associated SQL statement.
%NOTFOUND
This attribute is the logical opposite of %FOUND. It yields TRUE if an INSERT, UPDATE, or DELETE statement affected no rows, or a SELECT INTO statement returned no rows. Otherwise, it yields FALSE.
%ROWCOUNT
This attribute yields the number of rows affected by an INSERT, UPDATE, or DELETE statement, or returned by a SELECT INTO statement.
