db2和oracle查询序列区别
db2和oracle查询序列区别DB2中:nextval for sequencename ,prevval for sequencenameselect nextval for seq_name from sysibm.sysdummy1;select prevval for seq_name from sysibm.sysdummy1;oracle中:sequencename.nextval,sequencename.currvalselect seq_name.nextval from dual;select seq_name.currval from dual;sysibm.sysdummy1是DB2内存中的一个特殊的表. www.zzzyk.com