SQL Server functions for converting a String to a Date. PSE Advent Calendar 2022 (Day 11): The other side of Christmas. What to remember is that SQL Server only stores the milliseconds to the nearest 1/300th of a second. Is it possible to hide or delete the new Toolbar in 13.1? With the brackets I get the same error. counting up from 0 in the smallest increment: 00:00:00.000 00:00:00.003 00:00:00.007 00:00:00.010 00:00:00.013 . How do I UPDATE from a SELECT in SQL Server? SQL Server Convert Datetime to DateTime without milliseconds. Add a column with a default value to an existing table in SQL Server, How to return only the Date from a SQL Server DateTime datatype, How to check if a column exists in a SQL Server table, How to concatenate text from multiple rows into a single text string in SQL Server, LEFT JOIN vs. LEFT OUTER JOIN in SQL Server. According to msdn: Datetime values are rounded to increments of .000, .003, or .007 seconds. In the example above, the expression converts datetime value to string and extracts last digits (millisecons). So 0.0196 would round to 0.020. I then try to use that var later in a Data Flow task, in the query of a SQL Command, and nothing is ever returned - because of the issue that SSIS doesn't store ms in a datetime var. Now there are multiple ways through which we can remove the milliseconds part from a Datetime expression. The var is a SQL Server Integration Services: Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. It's a different precision. The Citrix Desktop Service lost contact with the Citrix Desktop Delivery Controller Service on server . Why do we use perturbative series if they don't converge? that being incredibly dump on MS's part, and the fact that they've promised it will be fixed, I can't get the solutions to work. Log Name: Application Source: Citrix Desktop Service Date: 10/13/2011 3:20:46 AM Event ID: 1014 Task Category: None Level: Warning Keywords: Classic User: . So that the second time it will match. What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. precision allowed. Why was USB 1.0 incredibly slow even for its time? I want to convert sql server datetime to milliseconds . Map the result set to a string variable:time. How can I do an UPDATE statement with JOIN in SQL Server? Given below is the script. I'm trying to save a datetime value from vb.net to a sql server. After that I tried to remove the seconds and milliseconds from datetime using same method but it gave me errors. With your code. The resolution of the date time field is to 3 decimal places: For example: 2011-06-06 23:59:59.997 and is only accuracte to within 3.33 ms. #, Jul 20 '05 Large scale of database and data cleansing. http://sqlblog.com/blogs/uri_dimant/ What is the highest level 1 persuasion bonus you can have? How do I UPDATE from a SELECT in SQL Server? Besides Arbitrary shape cut into triangles and packed into rectangle of the same area. Can i put a b-link on a standard mount rear derailleur to fit my direct mount frame, Central limit theorem replacing radical n with n, Name of poem: dangers of nuclear war/energy, referencing music of philharmonic orchestra/trio/cricket. HH:mm:ss.fff") it is coming properly with milliseconds I need the datetime values with milliseconds from datatable to insert into sql server datetime column Thanks, Mani Hi, When I assign the datetime, and updating that value into sql server database table, Milliseconds are set to 000 only I need to insert that datarow values into a sql server . stores the datetime as {7/31/2017 8:09:17 AM}, whereas SQL has 2017-07-31 08:09:17.413. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. SQL Transact-SQL (T-SQL) Reference Functions Date & time DATEPART (Transact-SQL) Article 10/24/2022 5 minutes to read 20 contributors Feedback In this article Syntax Arguments Return Type Return Value Week and weekday datepart arguments year, month, and day datepart Arguments iso_week datepart tzoffset smalldatetime date Argument Japanese girlfriend visiting me in Canada - questions at border control? If you can use datetime2, you get a higher precision. SQL SERVER - Multiple ways to remove Milliseconds from Datetime (Truncate Datetime till Second) | SQL Server Portal. This is because DATEDIFF () returns an int, which is too small to handle the number of milliseconds since 1970. So I cannot use it. SELECT CONVERT(VARCHAR(23), @date, 121); It seems that the data type is DateTime2(3). rev2022.12.11.43106. If you need that millisecond accuracy, there's no pleasant way around it. Find all tables containing column with specified name - MS SQL Server. Why was USB 1.0 incredibly slow even for its time? rev2022.12.11.43106. Yes, you are correct in your assumptions for what I'm doing - spot on. How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? Does anyone know where the discrepancy come from? 2) when I go to use it in my data flow task, what in the line below needs to change? SQL Server 2008 has much more precision available. E.g. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 1 These style values return nondeterministic results. DATETIME does not have infinite precision - you are probably using a value that cannot accurately be represented with the available bits. Let's try another one: When I examine the variable further it says milliseconds is 0. Zorn's lemma: old friend or historical relic? How can I delete using INNER JOIN with SQL Server? Or is it Entity Framework or OData that is messing this up? You will have to divide the values in hours and milliseconds. Would it be possible, given current technology, ten years, and an infinite amount of money, to construct a 7,000 foot (2200 meter) aircraft carrier? Reference System.Data and import the System.Data.SqlTypes namespace. This conversion is also not simply rounding, there is a complete conversion including tick calculations, MaxTime changes, etc.. Given the time critical nature of this data @Joel - I will pull off the milliseconds before I save it in the db the first time. SYSDATETIME (): To returns the server's date and time SYSDATETIMEOffset (): It returns the server's date and time, along with UTC offset GETUTCDATE (): It returns date and GMT (Greenwich Mean Time ) time Sad that we have to jump through so many hoops but very grateful to both Guoxiong and Pirlo for your help! Example # This example converts a string to a datetime value. Since SQL Server 2008 (10.0.x), the Database Engine derives the date and time values through use of the GetSystemTimeAsFileTime () Windows API. i have two dates from that i have taken milli seconds using datediff.now i want to display total hours,minutes,sec,millisec in that milli seconds. This can be beneficial to other community members reading this thread. Timeout (30000 milliseconds) waiting for the VMware Tools Service service to connect. Close, 3/1000 resolution would be 000, 003, 006, 009 1/300 resolution is 000, 003, 007, 010 We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. When it goes in the TimeOfDay value is: 09:30:03.0196095, When it comes out the TimeOfDay value is: 09:30:03.0200000. The field type in SQL Server is . How can I delete using INNER JOIN with SQL Server? Only three digits decimal. Try replacing the first line with: I tried your cast in the SQL Command query and it works, but doesn't return any data. OLE DB Source. I've tried to cast ImportDateTime and also put cast/convert on the parameter but it either doesn't work or gives some kind of an error about not being able to cast the parameter, so I'm sure I'm missing something. CONVERT DATETIME to TIME and remove seconds and milliseconds Chrissy321 SSCoach Points: 15669 More actions September 22, 2016 at 6:00 pm #329969 Hello Folks, How can I convert StartTime2 so. The datetime format you are using is unknown to SQL-Server. To display the millisecond component of a DateTime value Not the answer you're looking for? saw that you casted it as varchar, so I tried that. application inserts timestamp which includes amillisecondportion as a string (varchar). MS SQL Consulting: Ready to optimize your JavaScript with Rust? This API has a precision fixed at 100 nanoseconds. I can't get that to work. A word of warning, this will lose the Kind of the original DateTime structure (i.e. SQL Version: Does illicit payments qualify as transaction costs? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Find centralized, trusted content and collaborate around the technologies you use most. DECLARE @datetime DATETIME SET @datetime = GETDATE() SELECT @datetime AS [Datetime . In my step where I get the datetime back from my Exec SQL task, that task calls a stored proc which does some updates to the data that was just imported, and then returns the datetime value at the very end. The accuracy depends on the computer hardware and version of Windows on which the instance of SQL Server running. Search text in stored procedure in SQL Server. Making statements based on opinion; back them up with references or personal experience. DateTime dt = Convert.ToDateTime ( ( (DataRow)objRow) ["dt"].ToString ()); dt.ToString ("MM/dd/yyyy hh:mm:ss.fff tt"); In the first line you are cvonverting the datetime to a string with the ToString (losing the milliseconds) before converting it to a datetime. datetime2 still rounds millisecond decimals the same way for me. SELECT GETDATE () as 'DateTime', CAST (GETDATE () as datetime2 (0)) as 'NewDateTime'. This article shows how to include a date and time's millisecond component in formatted date and time strings. Why is the federal judiciary of the United States divided into circuits? Asking for help, clarification, or responding to other answers. Asking for help, clarification, or responding to other answers. Not the answer you're looking for? #, Use a decimal point to indicate the millisenconds. Stored Procedure in SQL Server. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Look at the Rounding of datetime Fractional Second Precision section of this msdn page and you'll understand how the rounding is done. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, Add a column with a default value to an existing table in SQL Server, How to return only the Date from a SQL Server DateTime datatype, How to concatenate text from multiple rows into a single text string in SQL Server, Convert string "Jun 1 2005 1:33PM" into datetime. When I try that it gives me this error: Invalid character value for cast specification. Find centralized, trusted content and collaborate around the technologies you use most. This really depends on the version of SQL server you are using. But on sql server management studio , I see that the field's value still has the milliseconds . Use CONVERT or TRY_CONVERT to perform this operation. Jul 20 '05 METHOD 1 : In this method, we will use Convert function to convert date time to varchar and then remove the seconds and milliseconds from it and then convert it back to datetime. What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. Thanks for contributing an answer to Stack Overflow! Was the ZX Spectrum used for number crunching? And by using the style parameter in Convert () function, we can even convert a string to different formats having milliseconds. MS SQL optimization: MS SQL Development and Optimization SQL Server is only accurate to 1/300th of a second. This is due to the precision of the SQL datetime type. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. as datetime2(3))" By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Creating Local Server From Public Address Professional Gaming Can Build Career CSS Properties You Should Know The Psychology Price How Design for Printing Key Expect Future. Remote DBA Services: This rounding can surprise you, so watch out. See the MSDN Datetime SQL Server reference. . There are three groups of date formats in SQL Server you can use to to preserve milliseconds 9 or 109 for Default + milliseconds 13 or 113 for Europian format 21 or 121 for ODBC format (that also matches ISO format) For example, SELECT CONVERT(varchar, DateTime, 21) FROM DateTest Returns: 2002-08-09 23:15:27.490 I have a value in my SQL Server table of 2015-10-30 12:17:41.007. Thanks for contributing an answer to Stack Overflow! We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. SQL Server stores DATETIME with a precision of 3.33 milliseconds (0. A comprehensive guide to the SQL Format function. Here's an example I've used: The result from SELECT shown in SQL Server Management Studio is off by 0.001 in this case: When trying multiple values, the result is shown is usually within 0.003 sec of the inserted time. :). For that level of accuracy, you want to use DATETIME2. Execute SQL Task. For higher precision the you may want to use DATETIME2 datatype introduced in MS SQL Server 2008 with OE10.2B using SANC10 driver. How to make voltage plus/minus signs bolder? The decimal ".999" is more precise than SQL Server can directly handle. Does SQL Server not have as much precision as .NET? Ready to optimize your JavaScript with Rust? To learn more, see our tips on writing great answers. Add a destination, e.g. Resolution This is expected behavior from MS SQL Server. The most widely used one is the DATETIME (look here ), as it has been present since the earlier versions of MS SQL Server. Most articles I've found say to store the var as a string then convert it to datetime when used in the data flow task. How were sailing warships maneuvered in battle -- who coordinated the actions of all the sailors? Includes all (yy) (without century) styles and a subset of (yyyy) (with century) styles. But I would like to know why this is happening. TryWHERE ImportDateTime =Convert(DateTime, ?,121). Making statements based on opinion; back them up with references or personal experience. Milliseconds in my DateTime changes when stored in SQL Server. Makes me feel better. rev2022.12.11.43106. When I put a breakpoint in so I can see the value of my string variable it has this: {7/30/2017 6:13:35 PM}, If I take off the squiggly brackets I get it to cast properly in SSMS. Does anyone know where the discrepancy come from? DECLARE @BMS BIGINT = 1542004320409; DECLARE @bh INT = @BMS / 360000; DECLARE @ims INT = @BMS % 360000; SELECT. (I've heard about this, but can't find an official reference.). In SQL Server, we can use the Convert () function to convert Datetime to a string with milliseconds. Would like to stay longer than 90 days. I then retrieve it with OData (WCF Data Services). The following function will strip the milliseconds from the SQL DATETIME and format the entire date expression: 'returns the fractional part of a positive double. METHOD 2 : What properties should my fictional HEAT rounds have to punch through heavy armor and ERA? Note that this code will not work if you declare @d as DATETIME or . Best Regards,Uri Dimant SQL Server MVP, How can I delete using INNER JOIN with SQL Server? Reference: time and datetime2 - Exploring SQL Server 2008's New Date/Time Data Types. Any ideas why I seem to be losing a millisecond?? Is this because it's a string, or is this just because that's what it puts around the value in debug mode? Ready to optimize your JavaScript with Rust? I think your best bet is to provide the rounding to the second PRIOR to storing it in SQL server if the milliseconds is unimportant. Be sure to read Rob Garrison's post about TIME and DATETIME2 -- these types have much higher resolution. I will just truncate off the milliseconds (I don't really need them). E.g. Connect and share knowledge within a single location that is structured and easy to search. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. SELECT CONVERT(DATETIME, '2022-04-28') AS Datetime Try it live Result: 1 record Datetime 2022-04-28 00:00:00.000 still won't give me a match because the db value has ms - 2017-07-30 18:13:35.260. SQL Server only stores time to approximately 1/300th of a second. For example, Inserting datetime with milliseconds in SQL Server, Datetime, SQL Server, Web App, Web Service, Inserting into sql server using parameterized - get new column value, getting problem while inserting using linked server, Millisecond values missing when inserting datetime into datetime column of sql Server, High security of openGauss - database audit, ElasticJob 3.0.2 is released including failover optimization, scheduling stability, and Java 19 compatibility, Knapsack 0-1 Python binary & rosettacode & WE, How to create a 3D snake game with Javascript (attached source code and game link). Mathematica cannot find square roots of some matrices? Thank you for the great explanation. why?? Japanese girlfriend visiting me in Canada - questions at border control? Using convert, as you described, for the return value from my stored proc gave me the datetime value with ms to my ssis var. I wasn't doing any casting/converting but Add a new light switch in line with another switch? Replies have been disabled for this discussion. MILLISECOND part of the DateTime in Sql Server We can use DATEPART() function to get the MILLISECOND part of the DateTime in Sql Server, here we need to specify datepart parameter of the DATEPART function as millisecondor mi. I've found several posts with this issue but either none work for me, or they don't have the full explanation and I'm missing something. Is it appropriate to ignore emails from a student asking obvious questions? Does integrating PDOS give total charge of a system? The default date and time formatting methods, such as DateTime.ToString (), include the hours, minutes, and seconds of a time value but exclude its milliseconds component. http://karaszi.com/the-ultimate-guide-to-the-datetime-datatypes. When choosing the DATETIME data type, the timestamp is internally represented by two integers: The first one represents the date and the second is the time. Why would Henry want to close the breach? Translating in bytes, the DATETIME type takes up 8 bytes, 4 bytes . So you can either use time in SQL Server or use .NET you could get millisecond. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, EF DateTimes do not match saved values in SQL Server, DateTime inserted in SqlServer changes value, Insert DateTime with milliseconds into SQL Server, When converting string to datetime the milliseconds precision is changing, Add a column with a default value to an existing table in SQL Server, How to check if a column exists in a SQL Server table, How to concatenate text from multiple rows into a single text string in SQL Server, LEFT JOIN vs. LEFT OUTER JOIN in SQL Server, How to truncate milliseconds off of a .NET DateTime, Function vs. SQL Command and map the parameter. This line of C# code runs: DateTime TrialStart = DateTime.Parse(TrialAbstractDT.Rows[0]["TrialStartTime"].ToString()); And the value of TrialStart is 10/30/15 12:17:41. The SQL Server datetime type only has a 1/300th of a second (~3.33 ms) resolution, so you are probably seeing a rounding error. SELECT GETDATE() 'Today', DATEPART(millisecond,GETDATE()) 'MilliSecond Part' SELECT GETDATE() 'Today', You could have. What am I missing? Join Bytes to post your question to a community of 471,635 software developers and data experts. Utc, Local). PSE Advent Calendar 2022 (Day 11): The other side of Christmas, Counterexamples to differentiation under integral sign, revisited. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. If you have any compliments or complaints to As indicated by others, you can use datetime2 instead of datetime to have a better precision: For those who do not have the ability to use DateTime2 in SQL (ex: like me using tables that are generated by a separate system that would be expensive to change for this single issue), there is a simple code modification that will do the rounding for you. SQL Server DateTime Formatting | www.venkateswarlu.co.in SQL Server DateTime Formatting SQL - Stored Procedures SQL - Stored Procedure Syntax SQL - Clauses SQL - Constraints SQL - IDENTITY SQL - Pre-Defined Datatypes SQL - User-Defined Data Types SQL - User Defined Functions SQL - Default databases SQL - View SQL - Triggers SQL - INDEX Guidelines Hello all. Find centralized, trusted content and collaborate around the technologies you use most. In this case since it is rounded up it also means that the DAY also gets rounded up. Irreducible representations of a product of two groups. The net effect of this makes it so that the Milliseconds are seen as 19 before it is saved and 20 after it is re-loaded. These always fall on the 0, 3 and 7 milliseconds. How do we know the true value of a parameter, in order to check estimator properties? To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page. Is this an at-all realistic configuration for a DHC-2 Beaver? Where does the idea of selling dragon parts come from? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, i noted same mistake with dates like '2008-12-31 23:59:59.999', look at this: SELECT CONVERT(DATETIME, '2008-12-31 23:59:59.999'). 2 The default values (0 or 100, 9 or 109, 13 or 113, 20 or 120, 23, and 21 or 25 or 121) always return the century (yyyy).. 3 Input when you convert to datetime; output when you convert to character data.. 4 Designed for XML use. By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use. as datetime)". I came across something that I think has to do with time resolution in SQL. When I made that last change it all works beautifully. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Not the answer you're looking for? The result from SELECT shown in SQL Server Management Studio is off by 0.001 in this case: 2016-04-01 15:01:02.130 When trying multiple values, the result is shown is usually within 0.003 sec of the inserted time. Improves MS SQL Database Performance The datetime2 type will accurately store values like this: 2008-12-19 09:31:38.5670514 (accuracy to 100 nanoseconds). I still didn't get any matches though until I changed the SQL Command query in my data flow task from "cast(? :). According to my tests on Azure SQL as of today, all of my DateTime fields have milliseconds with ones digits of 0, 3, and 6, Thanks for the responses. Add a Data Flow Task to hook the Execute SQL Task. We are discussing a few of them below. Arbitrary shape cut into triangles and packed into rectangle of the same area. What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. date from SQL, which of course contains milliseconds. SQL Server stores datetime values to a precision of 3 milliseconds. Single Row ResultSet. I just have to adjust my unit tests. Either of these will work: INSERT INTO foo VALUES ( {ts '2003-11-05 12:02:43.296'}) INSERT INTO foo VALUES ('2003-11-05T12:02:43.296') SQLServer's DATETIME data type rounds to the nearest 3 milliseconds so the. Creating Local Server From Public Address Professional Gaming Can Build Career CSS Properties You Should Know The Psychology Price How Design for Printing Key Expect Future. Alas, DateTime2 is not supported in OData. From a Exec SQL task in my SSIS project I have a result set value that populates a variable. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Another sample data to compare the value with the variable. Business Intelligence. Why is the federal judiciary of the United States divided into circuits? How is Jesus God when he sits at the right hand of the true God? How to get the identity of an inserted row? Only three digits decimal. Connect and share knowledge within a single location that is structured and easy to search. Dual EU/US Citizen entered EU on US Passport. Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, MS SQL Server is dropping 1 millisecond from converted time, SQL Server : datetime comparison ignoring few milliseconds, SQL Server milliseconds always end in 0, 3 and 7, Milliseconds wrong when converting from XML to SQL Server datetime, DateTime inserted in SqlServer changes value, Inserting datetime with milliseconds into SQL Server table issue, Why SQL changes the exact datetime by one tick, Convert DateTime Time from 00:00:00 to 23:59:59, Datetime field overflow with IBM Data Server Client v9.7fp5. time and datetime2 - Exploring SQL Server 2008's New Date/Time Data Types. Asking for help, clarification, or responding to other answers. To solve your issue, use DateTime2(3) as shown below: Thanks for contributing an answer to Stack Overflow! In my earlier article, I wrote a solution how to remove milliseconds from datetime. When would I give a checkpoint to my D&D party that they can return to if they die? I have a date time that I generate like this: I then store it in the database (in a DateTime typed column) with Entity Framework. I have used the DATEADD function as below, but this was giving an arithmetic overflow exception by supping milliseconds as difference: Beginning with SQL 2008, other data types were added to provide more detail, such as datetime2 which has up to 7 decimal places and is accurate to within 100ns. Use a decimal point to indicate the millisenconds. In this article. Where does the idea of selling dragon parts come from? I'm using this code : Dim dt As DateTime = DateTime.Now.ToString("dd/MM/yyyy HH:mm:ss") After I save this value to Database. Workaround Notes Whatever the answer, it You can then (optionally) store an 'approximate' date in the native date type for the sake of speed, but it introduces a conceptual complexity that often isn't wanted. To learn more, see our tips on writing great answers. ImportDateTime is my column in SQL with ms, and obviously I'm using my var as a parameter in the SQL Command query of the data flow task. These always fall on the 0, 3 and 7 milliseconds. Look at the Rounding of datetime Fractional Second Precision section of this msdn page and you'll understand how the rounding is done. Large scale of database and data cleansing Why does the USA not have a constitutional court? SQL Convert String to DATETIME Converting a string to a datetime value is a common requirement. The var is a date from SQL, which of course contains milliseconds. 'in VB.Net you can substituted this with the truncate function. Yes that is the same with .NET DateTime but it require Double data type because INT resolution is limited. How do I UPDATE from a SELECT in SQL Server? Connect and share knowledge within a single location that is structured and easy to search. Was the ZX Spectrum used for number crunching? Are defenders behind an arrow slit attackable? See the related questions to the side. MSDN Support, feel free to contact MSDNFSF@microsoft.com. Here is an example of converting a string datetime to datetime2, then adding 1 millisecond, and lastly, converting back to a string. Return the Milliseconds If you need to return a Unix timestamp with higher precision, say, the number of milliseconds since '1970-01-01 00:00:00.000' UTC, you'll need to swap the DATEDIFF () function for DATEDIFF_BIG (). ST_Tesselate on PolyhedralSurface is invalid : Polygon 0 is invalid: points don't lie in the same plane (and Is_Planar() only applies to polygons), Disconnect vertical tab connector from PCB. The best options I've seen are to store the value in custom number fields and rebuild it every time you fetch the value, or to store it as a string of a known format. --This script is compatible with SQL Server 2012 and above. According to MSDN https://msdn.microsoft.com/en-CA/library/ms187819.aspx, the accuracy of [DateTime] data type is "Rounded to increments of .000, .003, or .007 seconds". One of the other posters is correct; DATETIME (in T-SQL) is not accurate to the millisecond (it is accurate to the centisecond). to simply "cast(? If you need that millisecond accuracy, there's no pleasant way around it. DECLARE @date DATETIME2(3) = '2017-07-30 18:13:35.260'; As indicated by others, you can use datetime2 instead of datetime to have a better precision: datetime time range is 00:00:00 through 23:59:59.997 datetime2 time range is 00:00:00 through 23:59:59.9999999 Share DECLARE @ d DATETIME2(3) = GETDATE () -- Expression extracts last 3 digits expecting milliseconds SELECT CAST (RIGHT( CAST (@ d AS VARCHAR), 3) AS INTEGER) AS ms. 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