I want to make a server and client side WITSML (for Oil & Gas Wells Drilling Data Send/Receive). There are some SDKs here: (WITSML api library for .Net / C# client apps?). I surfed though the internet, but i have not been found any code example or guide to use them.
==>.Are There any code example to develop a WITSML and/or WITS server and Client side software in C#?
Thank you in advance.
Without knowing what column EventDate is (we can guess, but that's dangerous!) we can't tell you.
However, if EventDate is a DATETIME type, how about
CAST(EventDate ASDATE) = CAST('NOW'ASDATE)
(Disclaimer - I don't know Firebird so using 'NOW' to get current date/time seems a bit weird - converting a string literal NOW to date time? I'd be more used to CAST(NOW() AS DATE) or CAST(NOW AS DATE) ... )
createtable PendingQueue (
cnstraint pk_pending_id nonclusteredprimarykey(id));
createclusteredindex cdxPendingQueue on PendingQueue (DueTime);
insertinto PendingQueue (DueTime, Payload)
values (@dueTime, @payload);
@batchsizeint = 100,
@retrysecondsint = 600assetnocounton;
set@now = getutcdate();
with cte as (
from PendingQueue with (rowlock, readpast)
where DueTime < @noworderby DueTime)
set DueTime = dateadd(seconds, @retryseconds, DueTime)
output deleted.Payload, deleted.id;
Specially see this line set DueTime = dateadd(seconds, @retryseconds, DueTime)
How this line instruct sql server to retry the update data again after 10 minute if fail to update data first time. this is not clear to me. please some one explain if you understand properly. thanks
I have some confusion about lock (ROWLOCK ,UPDLock AND xlock). i want to know the difference among these locks. where to use UPDLock, when to use RowLock and when Xlock with a example for better clarification.
BEGINTRANSACTIONSELECT @ID=RowID FROM MyTable WITH (ROWLOCK, XLOCK, HOLDLOCK) WHERE ID=6822
In the above sql rowlock and XLOCK both use as a result from other session records 6822 could not be read or modify. XLOCK alone is capable to lock the rows....so why one should use ROWLOCK & XLOCK together ?
if i use only xlock & HOLDLOCK then it will not serve the purpose ?
2) Tell me with example what is the difference between ROWLOCK & UPDLOCK ?
ROWLOCK prevent other session to modify data and UPDLOCK does the same thing. so what is the difference
between ROWLOCK & UPDLOCK ?
Please anyone explain these difference with example as a result at my end i can run the example code and understand.