Solved

How do Return a unique number from a datetime field in sql 2008

Posted on 2010-09-22
4
523 Views
Last Modified: 2012-05-10
Hi Gurus

I am pulling my hair out.  How do i return an integer that is unique based on date AND time from a date time field.  The value currently in the datetime field which is called datetimsubmitted is '2010/09/03 10:18:05 AM'

It is easy to return an integer from the date only but each record needs to be uniquely identified by an integer based on date and time to the second
many thanks
Alan
0
Comment
Question by:caandal
  • 2
4 Comments
 
LVL 8

Accepted Solution

by:
Mohit Vijay earned 500 total points
ID: 33733619
If you want to return a BigInt, based of DateTime value, that will be always unique

use

CAST(Convert(VARCHAR(50), GETDATE(), 112) + REPLACE(Convert(VARCHAR(50), GETDATE(), 114),':','') AS BIGINT)

To Test it write

SELECT CAST(Convert(VARCHAR(50), GETDATE(), 112) + REPLACE(Convert(VARCHAR(50), GETDATE(), 114),':','') AS BIGINT)

0
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 33733634
How about seconds from date 0 (1900-01-01) ?

convert(bigint, convert(float, datetimesubmitted)*24*60*60)
0
 
LVL 58

Expert Comment

by:cyberkiwi
ID: 33733655
Or the Unix timestamp, which is number of seconds from 1970-01-01 12:00am

convert(int, (convert(float, datetimesubmitted)-convert(float, convert(datetime,'19700101')))*24*60*60)
0
 

Author Closing Comment

by:caandal
ID: 33733678
Hi VjSoft
Thanks - I was one bracket away from the right solution and then chucked it out
Alan
0

Featured Post

Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Why is this different from all of the other step by step guides?  Because I make a living as a DBA and not as a writer and I lived through this experience. Defining the name: When I talk to people they say different names on this subject stuff l…
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Viewers will learn how to use the UPDATE and DELETE statements to change or remove existing data from their tables. Make a table: Update a specific column given a specific row using the UPDATE statement: Remove a set of values using the DELETE s…

840 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question