Problem Using CAST With Zeroed Out Field Values
Jul 23, 2005
Hello --
I have a field with date values like: 20050714. When using SQL Server
to convert it to a Date in a View, I use the following:
CAST(MyDate as DateTime)
That works great. The problem is that some rows have the value:
00000000
When it hits one of these, I get a SQL Server Enterprise Manager Error:
Database Server: Microsoft SQL Server
Version: 08.00.0760
Runtime Error: [Microsoft][ODBC SQL Server Driver][SQL Server]The
conversion of a char data type to a datetime data type resulted in an
out-of-range datetime value.
Is there a workaround for this? Any assistance greatly appreciated.
RBollinger
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Jan 17, 2007
Greetings.
I've got some (standard?) data corruption issue with quite large SQL database (~8GB). Our RAID10 crashed recently with no chances to restore our database from backup (backup copies were saved on the same disk array weekly (complete backup) - quite a dumb idea and very good lesson, I must admit it).
We managed to get almost all data back from our disks and I attached databases at another server. Today I used DBCC CHECKDB which found like 15 corrupt pages in single _very_ large user table (~4GB):
Server: Msg 8909, Level 16, State 1, Line 1
Table error: Object ID 0, index ID 0, page ID (1:39664). The PageId in the page header = (0:0).
....
(etc, ~15 times with different page numbers)
DBCC PAGE displayed that they were just filled with 0 (I guess they resided on those few unlucky disk sectors, data recovering company was unable to read).
I restored most recent backup (like 1 week old) to another database and checked these pages again (and few that were before & after them), they were just fine and the pages before and after were the same exactly.
Well... Here is my Big Question :)
Is there any chance I can get these pages from restored database and just write them over my corrupted data with some tool?
I have no idea how to locate the offset of these pages inside .MDF file at this moment.
Can someone help me with it? This place seems like my last hope...
Thanks in advance.
P.S. I'm trying to avoid dropping these pages in any possible way, they contain... uhh, sort of financial information.
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Apr 17, 2007
Here's a portion of the current statement.
UPDATE EngagementAuditAreas
SET numDeterminationLevelTypeId = parent.numDeterminationLevelTypeId,
numInherentRiskID = parent.numInherentRiskID,
numControlRiskID = parent.numControlRiskID,
numCombinedRiskID = parent.numCombinedRiskID,
numApproachTypeId = parent.numApproachTypeId,
bInherentRiskIsAffirmed = 0,
bControlRiskIsAffirmed = 0,
bCombinedRiskIsAffirmed = 0,
bApproachTypeIsAffirmed = 0,
bCommentsIsAffirmed = 0
FROM EngagementAuditAreas WITH(NOLOCK) ...
And what I need is to conditionalize the values of the "IsAffirmed" fields by looking at their corresponding "num" fields. Something like this (which doesn't work).
UPDATE EngagementAuditAreas
SET numDeterminationLevelTypeId = parent.numDeterminationLevelTypeId,
numInherentRiskID = parent.numInherentRiskID,
numControlRiskID = parent.numControlRiskID,
numCombinedRiskID = parent.numCombinedRiskID,
numApproachTypeId = parent.numApproachTypeId,
bInherentRiskIsAffirmed = (numInherentRiskID IS NULL),
bControlRiskIsAffirmed = (numControlRiskID IS NULL),
bCombinedRiskIsAffirmed = (numCombinedRiskID IS NULL),
bApproachTypeIsAffirmed = (numApproachTypeID IS NULL),
bCommentsIsAffirmed = (parent.txtComments IS NULL)
FROM EngagementAuditAreas WITH(NOLOCK)
Thanks.
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Oct 16, 2007
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/regards J
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ak
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