datetime2 | 易学教程

HashBytes with datetime2 field

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问题 I am creating a hash key using hashbytes on multiple columns to get performance gain which we are using right now in where clause. alter table dbo.Table1 add HashKey AS CAST(hashbytes('MD5', PID+PNumber+CONVERT([varchar] (50),[DateStamp]) +CONVERT(VARCHAR(50), TransactionCount)+OCD+ONbr+TransactionID) AS VARBINARY(80)) PERSISTED But one of the column in that is a datetime2 field which i am unable to add. While i was trying i am getting below error message "Computed column 'HashKey' in table

Accuracy of SYSDATETIME Data Type in SQL Server

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问题 I have done some testing using the SYSDATETIME in stored procedure in SQL Server 2008. I have setup a table with a datetime2(7) with a IDENTITY field. I understand the difference between the precision and the accuracy of this data type however, I noticed an unusual result when inserting multiple records from this example: declare @counter int set @counter = 0 while @counter < 100000 begin set @counter = @counter + 1 INSERT INTO t ([now]) VALUES (SYSDATETIME()) end I looped through using an

SQL ignore nanoseconds when comparing datetime2

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I have 2 tables with a datetime2 field each. One of the tables has stored nanoseconds as well, while the other one only stores up to milliseconds (there is no way to change this data). Now I want to compare the 2 tables and check if the datetime2 values match, but I have to ignore the nanoseconds for this. Sample data: Table1 Table2 2018-01-24 10:51:23.9976180 2018-01-24 10:51:23.9970000 2018-01-24 10:51:23.9976180 2018-01-24 10:51:23.9970000 2018-01-24 11:08:23.2578500 2018-01-24 11:08:23.2570000 my query currently looks like this: select t1.* from Table1 t1, Table12 t2 where t1.tradeDateTime

How is SQL Server's timestamp2 supposed to work in JDBC?

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I'm having some trouble trying to use timestamp2 instead of Timestamp in SQL Server 2008. Apparently, rs.getTimestamp has very different behavior between timestamp and timestamp2. However, I can't find any documentation stating that there should be a difference, or that I should be using something different. I wonder whether I'm just doing something wrong. Environment: Tried on both SQL Express 2008 (10.0) and SQL Server 2008 R2 (10.5). sqljdbc4.jar version 3.0, size of 537,303 bytes, CRC-32=a0aa1e25, MD5=402130141d5f2cee727f4371e2e8fd8a. Java 1.6 Here is a unit test demonstrating the problem.

Hibernate MSSQL datetime2 mapping

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I have a stored procedure which is returning a column having datatype as datetime2 in database and Date in Java file. When I am trying to call getTime() on that obtained time from database. It's returning 19994321211 millisecond which is equivalent to Mon May 04 00:00:00 IST 2015. ideally it should return milliseconds of 2015-05-04 15:21:52 as this is the time shown in database when procedure is executed directly. As I am new to Hibernate , I am unable to understand if the issue is related to hibernate mapping or something else I am missing out. <hibernate-mapping> <sql-query name="getMLC">

Hibernate MSSQL datetime2 mapping

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问题 I have a stored procedure which is returning a column having datatype as datetime2 in database and Date in Java file. When I am trying to call getTime() on that obtained time from database. It's returning 19994321211 millisecond which is equivalent to Mon May 04 00:00:00 IST 2015. ideally it should return milliseconds of 2015-05-04 15:21:52 as this is the time shown in database when procedure is executed directly. As I am new to Hibernate , I am unable to understand if the issue is related to

Using SQL Server 2008 and SQL Server 2005 and date time

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I've built a entity framework model against a 2008 database. All works ok against the 2008 database. When I try to update the entity on a 2005 database I get this error. The version of SQL Server in use does not support datatype 'datetime2 I specifically did not use any 2008 features when I built the database. I can't find any reference to datetime2 in the code. And, yes the column is defined as "datetime" in the database. A quick google points me to what looks like the solution . Open your EDMX in a file editor (or “open with…” in Visual Studio and select XML Editor). At the top you will find

DateTime2 vs DateTime in SQL Server

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问题 Which one: datetime datetime2 is the recommended way to store date and time in SQL Server 2008+? I\'m aware of differences in precision (and storage space probably), but ignoring those for now, is there a best practice document on when to use what, or maybe we should just use datetime2 only? 回答1: The MSDN documentation for datetime recommends using datetime2. Here is their recommendation: Use the time , date , datetime2 and datetimeoffset data types for new work. These types align with the