昨天我只是将数据库附加到SQL2012,然后各个数据库都做了收缩事务日志的操作兼容级别这些都没有改再附加回SQL2005的时候就报错在SQL2012里附加,确实是90级别,但是在SQL2005死活附加不上备份数据库再还原也是一样重建事务日志也是一样然后我做了一个实验,检查一下附加到SQL2012的数据库和附加到SQL2005的数据库,两个数据库的文件头有什么不同注意:两个数据库的兼容级别都是90,附加到SQL2012之后我也没有动过兼容级别!!我们用同一个数据库,分别附加到SQL2005上和SQL2012上,看一下附加之后数据库的文件头有没有改变这个数据库的兼容级别是90的附加到SQL2012之后,我也不改变他的兼容级别查看文件头的SQL语句如下,实际上就是数据库的第0页:复制代码代码如下:DBCCTRACEON(3604,-1)DBCCPAGE(dlgpos,1,0,3)在SQL2012里和SQL2005里都执行一下将结果复制粘贴到一个新建的记事本里,命名好复制代码代码如下:DBCC执行完毕。如果DBCC输出了错误信息,请与系统管理员联系
昨天我只是将数据库附加到SQL2012,然后各个数据库都做了收缩事务日志的操作
兼容级别这些都没有改
再附加回SQL2005的时候就报错
在SQL2012里附加,确实是90级别,但是在SQL2005死活附加不上
备份数据库再还原也是一样
重建事务日志也是一样
然后我做了一个实验,检查一下附加到SQL2012的数据库和附加到SQL2005的数据库,两个数据库的文件头有什么不同
注意:两个数据库的兼容级别都是90,附加到SQL2012之后我也没有动过兼容级别!!
我们用同一个数据库,分别附加到SQL2005上和SQL2012上,看一下附加之后数据库的文件头有没有改变
这个数据库的兼容级别是90的
附加到SQL2012之后,我也不改变他的兼容级别
查看文件头的SQL语句如下,实际上就是数据库的第0页:
DBCC TRACEON(3604,-1)
DBCC PAGE(dlgpos,1,0,3)
在SQL2012里和SQL2005里都执行一下
将结果复制粘贴到一个新建的记事本里,命名好
DBCC 执行完毕。如果 DBCC 输出了错误信息,请与系统管理员联系。
PAGE: (1:0)
BUFFER:
BUF @0x035D7380
bpage = 0x05BC0000 bhash = 0x00000000 bpageno = (1:0)
bdbid = 5 breferences = 0 bUse1 = 8142
bstat = 0xc00009 blog = 0x59ca2159 bnext = 0x00000000
PAGE HEADER:
Page @0x05BC0000
m_pageId = (1:0) m_headerVersion = 1 m_type = 15
m_typeFlagBits = 0x0 m_level = 0 m_flagBits = 0x208
m_objId (AllocUnitId.idObj) = 99 m_indexId (AllocUnitId.idInd) = 0 Metadata: AllocUnitId = 6488064
Metadata: PartitionId = 0 Metadata: IndexId = 0 Metadata: ObjectId = 99
m_prevPage = (0:0) m_nextPage = (0:0) pminlen = 0
m_slotCnt = 1 m_freeCnt = 7636 m_freeData = 2844
m_reservedCnt = 0 m_lsn = (132:328:1) m_xactReserved = 0
m_xdesId = (0:0) m_ghostRecCnt = 0 m_tornBits = 1431739479
Allocation Status
GAM (1:2) = ALLOCATED SGAM (1:3) = NOT ALLOCATED PFS (1:1) = 0x44 ALLOCATED 100_PCT_FULL
DIFF (1:6) = CHANGED ML (1:7) = NOT MIN_LOGGED
File Header Data:
Record Type = PRIMARY_RECORD Record Attributes = NULL_BITMAP VARIABLE_COLUMNS
Memory Dump @0x5D95C952
00000000: 30000800 00000000 2d000000 00000000 ?0.......-.......
00000010: 2c007a00 7a007c00 7e008200 86008a00 ?,.z.z.|.~.......
00000020: 8e009800 a200ac00 ac00b000 b400b800 ?................
00000030: bc00c600 e200ec00 f6000001 10011a01 ?................
00000040: 2a012e01 38013801 44015401 54015401 ?*...8.8.D.T.T.T.
00000050: 54015401 54015401 64016401 64016e01 ?T.T.T.T.d.d.d.n.
00000060: 78019401 9e01ae01 ca019eb2 1d7874c9 ?x............xt.
00000070: 5d4d85b9 d1422e77 c1620100 01008002 ?]M...B.w.b......
00000080: 0000ffff ffff8000 00000000 00000000 ?................
00000090: 00000000 00000000 00000000 00000000 ?................
000000A0: 00000000 00000000 00000000 80010000 ?................
000000B0: 00000000 ffffffff 00020000 7e000000 ?............~...
000000C0: c6000000 01007e00 0000c600 00000100 ?......~.........
000000D0: 0000355a f94bc493 9149ac29 044140d0 ?..5Z.K...I.).A@.
000000E0: 3b1f7e00 0000b100 00002500 00000000 ?;.~.......%.....
000000F0: 00000000 00008400 00003601 00002500 ?..........6...%.
00000100: 0567c9fb b5520346 853c86ad b3f47661 ?.g...R.F.<....va
00000110: 00000000 00000000 0000018e a4cb618f ?..............a.
00000120: 414c90c3 68f1a4fd 0d810800 00007e00 ?AL..h.........~.
00000130: 0000c600 00000100 44004c00 47005000 ?........D.L.G.P.
00000140: 4f005300 cf6c06e9 4b9b3649 a11c2b70 ?O.S..l..K.6I..+p
00000150: dbebb977 355af94b c4939149 ac290441 ?...w5Z.K...I.).A
00000160: 40d03b1f 00000000 00000000 00000000 ?@.;.............
00000170: 00000000 00000000 00000000 00000000 ?................
00000180: 00000000 00000000 00000000 00000000 ?................
00000190: 00000000 7e000000 b1000000 25003804 ?....~.......%.8.
000001A0: 48829a28 104c95f3 4b9d6a91 ab480000 ?H..(.L..K.j..H..
000001B0: 00000000 00000000 00000000 00000000 ?................
000001C0: 00000000 00000000 0000???????????????..........
BindingID = 781db29e-c974-4d5d-85b9-d1422e77c162 FileGroupId = 1
FileIdProp = 1 Size = 640 MaxSize = 65535
Growth = 128 Perf = 0 BackupLsn = (0:0:0)
MaxLsn = (126:198:1) FirstLsn = (126:177:37) OldestRestoredLsn = (0:0:0)
FirstUpdateLsn = (0:0:0) FirstNonloggedUpdateLsn = [NULL] CreateLsn = (0:0:0)
DifferentialBaseLsn = (132:310:37) DifferentialBaseGuid = fbc96705-52b5-4603-853c-86adb3f47661
MinSize = 384 Status = 0 UserShrinkSize = 65535
DBCC 执行完毕。如果 DBCC 输出了错误信息,请与系统管理员联系。
SQL2012文件头
DBCC 执行完毕。如果 DBCC 输出了错误信息,请与系统管理员联系。
PAGE: (1:0)
BUFFER:
BUF @0x0456ACA8
bpage = 0x187CA000 bhash = 0x00000000 bpageno = (1:0)
bdbid = 9 breferences = 0 bcputicks = 0
bsampleCount = 0 bUse1 = 8145 bstat = 0x9
blog = 0x21215a7a bnext = 0x00000000
PAGE HEADER:
Page @0x187CA000
m_pageId = (1:0) m_headerVersion = 1 m_type = 15
m_typeFlagBits = 0x0 m_level = 0 m_flagBits = 0x208
m_objId (AllocUnitId.idObj) = 99 m_indexId (AllocUnitId.idInd) = 0 Metadata: AllocUnitId = 6488064
Metadata: PartitionId = 0 Metadata: IndexId = 0 Metadata: ObjectId = 99
m_prevPage = (0:0) m_nextPage = (0:0) pminlen = 0
m_slotCnt = 1 m_freeCnt = 7636 m_freeData = 3302
m_reservedCnt = 0 m_lsn = (141:733:159) m_xactReserved = 0
m_xdesId = (0:0) m_ghostRecCnt = 0 m_tornBits = 426768658
DB Frag ID = 1
Allocation Status
GAM (1:2) = ALLOCATED SGAM (1:3) = NOT ALLOCATED PFS (1:1) = 0x44 ALLOCATED 100_PCT_FULL
DIFF (1:6) = CHANGED ML (1:7) = NOT MIN_LOGGED
File Header Data:
Record Type = PRIMARY_RECORD Record Attributes = NULL_BITMAP VARIABLE_COLUMNS
Record Size = 458
Memory Dump @0x1019CB1C
00000000: 30000800 00000000 2d000000 00000000 2c007a00 0.......-.......,.z.
00000014: 7a007c00 7e008200 86008a00 8e009800 a200ac00 z.|.~...............
00000028: ac00b000 b400b800 bc00c600 e200ec00 f6000001 ....................
0000003C: 10011a01 2a012e01 38013801 44015401 54015401 ....*...8.8.D.T.T.T.
00000050: 54015401 54015401 64016401 64016e01 78019401 T.T.T.T.d.d.d.n.x...
00000064: 9e01ae01 ca019eb2 1d7874c9 5d4d85b9 d1422e77 .........xt.]M...B.w
00000078: c1620100 01000003 0000ffff ffff8000 00000000 .b..................
0000008C: 00000000 00000000 00000000 00000000 00000000 ....................
000000A0: 00000000 00000000 00000000 80010000 00000000 ....................
000000B4: ffffffff 00020000 7e000000 c6000000 01007e00 ........~.........~.
000000C8: 0000c600 00000100 0000355a f94bc493 9149ac29 ..........5Z.K...I.)
000000DC: 044140d0 3b1f7e00 0000b100 00002500 00000000 .A@.;.~.......%.....
000000F0: 00000000 00008400 00003601 00002500 0567c9fb ..........6...%..g..
00000104: b5520346 853c86ad b3f47661 00000000 00000000 .R.F.<....va........
00000118: 0000018e a4cb618f 414c90c3 68f1a4fd 0d810800 ......a.AL..h.......
0000012C: 00007e00 0000c600 00000100 44004c00 47005000 ..~.........D.L.G.P.
00000140: 4f005300 cf6c06e9 4b9b3649 a11c2b70 dbebb977 O.S..l..K.6I..+p...w
00000154: 355af94b c4939149 ac290441 40d03b1f 00000000 5Z.K...I.).A@.;.....
00000168: 00000000 00000000 00000000 00000000 00000000 ....................
0000017C: 00000000 00000000 00000000 00000000 00000000 ....................
00000190: 00000000 7e000000 b1000000 25003804 48829a28 ....~.......%.8.H..(
000001A4: 104c95f3 4b9d6a91 ab480000 00000000 00000000 .L..K.j..H..........
000001B8: 00000000 00000000 00000000 00000000 0000 ..................
BindingID = 781db29e-c974-4d5d-85b9-d1422e77c162 FileIdProp = 1
FileGroupId = 1 Size = 768 MaxSize = 65535
Growth = 128 Perf = 0 BackupLsn = (0:0:0)
FirstUpdateLsn = (0:0:0) OldestRestoredLsn = (0:0:0) FirstNonloggedUpdateLsn = [NULL]
MinSize = 384 Status = 0 UserShrinkSize = 65535
SectorSize = 512 MaxLsn = (126:198:1) FirstLsn = (126:177:37)
CreateLsn = (0:0:0) DifferentialBaseLsn = (132:310:37)
DifferentialBaseGuid = fbc96705-52b5-4603-853c-86adb3f47661 FileOfflineLsn = (0:0:0)
FileIdGuid = cba48e01-8f61-4c41-90c3-68f1a4fd0d81 RestoreStatus = 8
RestoreRedoStartLsn = (126:198:1) RestoreSourceGuid = e9066ccf-9b4b-4936-a11c-2b70dbebb977
HardenedSkipLsn = [NULL] ReplTxfTruncationLsn = [NULL] TxfBackupLsn = [NULL]
FstrContainerSize = [NULL] MaxLsnBranchId = 4bf95a35-93c4-4991-ac29-044140d03b1f
SecondaryRedoStartLsn = [NULL] SecondaryDifferentialBaseLsn = [NULL]
ReadOnlyLsn = (0:0:0) ReadWriteLsn = (0:0:0)
RestoreDifferentialBaseLsn = (126:177:37)
RestoreDifferentialBaseGuid = 82480438-289a-4c10-95f3-4b9d6a91ab48
RestorePathOrigin
hex (dec) = 0x00000000:00000000:0000 (0:0:0)
m_guid = 00000000-0000-0000-0000-000000000000
DatabaseEncryptionFileState = [NULL]FCBFileDEK = [NULL]
DBCC 执行完毕。如果 DBCC 输出了错误信息,请与系统管理员联系。
可以用Beyond Compare这个软件比较一下两者的文件头的差异
Beyond Compare这个软件会把两个txt文件中的相同点用蓝色标记出来,不同点用红色标记出来
当附加到SQL2012之后,数据库的文件头已经走样了,就算你没有动过兼容级别,这也是造成曾经附加到SQL2012的数据库
再也附加不上SQL2005上的原因
可以看到SQL2012的数据库记录的信息比SQL2005详细多了,多了很多内容
也可以用下面的SQL语句看文件头的内容,不过信息比较少
1 DBCC fileheader('DLGPOS')
总结
上面的实验证明了,当你将一个SQL2005的数据库附加到SQL2012上的时候,SQL2012马上改变数据库的文件头
就算你不动数据库兼容级别,实际上数据库的信息已经改变了(这里指文件头信息)
所以你死活附加不回去SQL2005了
以后不要轻易附加数据库到SQL2012上,不然的话。。。。。。
补充一下
标签: 加到 SQL2012 数据库 就不 能再 低于 版本 解决 方法
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