查询所有设备最近一次备份历史记录，要求显示设备名称，文件名，最近备份时间，ip等。
SELECT DEVICEHISTORYID, NEDN, FILENAME, BACKTIME, BASELINEFLAG, RESULT, RUNDATE, TASKNAME, BACKTYPE
FROM DBSNMP.TBL_CONFMGR_DEVICEHISTORY（设备历史记录表）
SELECT NEDN, SYSNAME, NENAME, NECATEGORY, NETYPE, NEVENDORNAME, NEIP, NEMASK, NEMAC, VERSION, NEPATCHVERSION, NESYSOID, NEEXTENATTR, NESTATE, LASTPOLLTIME
FROM DBSNMP.TBL_NE_INFO（设备表）
看你给的字段都不知道是表示什么的只能猜，麻烦。这里我当backtime是备份时间了。
首先查询历史记录表以设备分组，因为设备标号只定唯一，查询最大备份时间，这样确定一个最大备份时间表，然后在和设备表一起查询就好办了。
[code="sql"]
select t.NENAME,c.FILENAME,c.BACKTIME,t.NEIP --别的字段自己加
from DBSNMP.TBL_NE_INFO t,
(SELECT DEVICEHISTORYID, NEDN as NEDN, FILENAME as FILENAME,BASELINEFLAG, RESULT, RUNDATE, TASKNAME, BACKTYPE,
max(BACKTIME) as BACKTIME
FROM DBSNMP.TBL_CONFMGR_DEVICEHISTORY
group by NEDN) c
where t.NEDN = c.NEDN [/code]
[code="sql"]
-- NEDN 是设备的ID吗? 如果是,则:
select t.*
from DBSNMP.TBL_CONFMGR_DEVICEHISTORY t,
(SELECT NEDN, -- 是设备的ID吗?
max(BACKTIME) as BACKTIME -- 是备份时间吗?
FROM DBSNMP.TBL_CONFMGR_DEVICEHISTORY
group by NEDN) c
where t.NEDN = c.NEDN
and t.BACKTIME = c.BACKTIME
[/code]
[code="SQL"]
select a.NENAME,b.FILENAME,b.RUNDATE,a.NEIP from DBSNMP.TBL_NE_INFO a,
(
select * from DBSNMP.TBL_CONFMGR_DEVICEHISTORY c,
(select nedn,max(RUNDATE) from
DBSNMP.TBL_CONFMGR_DEVICEHISTORY group by NEDN) d
where c.nedn = d.nedn and c.rundate = d.rundate
) b
where a.nedn = b.nedn
[/code]
试试~
我发的那个SQL是把RUNDATE 当备份时间了~
还有LS的SQL,这段确定能执行吗~ 明显有问题哦~
[quote]SELECT DEVICEHISTORYID, NEDN as NEDN, FILENAME as FILENAME,BASELINEFLAG, RESULT, RUNDATE, TASKNAME, BACKTYPE,
max(BACKTIME) as BACKTIME
FROM DBSNMP.TBL_CONFMGR_DEVICEHISTORY
group by NEDN[/quote]