Solved

convert this back to a date?

Posted on 2016-09-16
13
63 Views
Last Modified: 2016-09-30
I want this result to be converted to a date.  The point of the below code was to return only month and year but now i want that to be recognized as a date .

SELECT CONVERT(VARCHAR, MONTH(getdate())-1, 120) + '/' + CONVERT(VARCHAR, YEAR(getdate())-1, 120)  

SO I was hoping to do something like this but i got an error

SELECT CONVERT(datetime, CONVERT(VARCHAR, MONTH(getdate()), 120) + '/' + CONVERT(VARCHAR, YEAR(getdate()), 120)  , 104)
0
Comment
Question by:vbnetcoder
  • 4
  • 4
  • 2
  • +1
13 Comments
 
LVL 28

Expert Comment

by:Pawan Kumar
ID: 41801793
Try this


SELECT DATEFROMPARTS(YEAR(GETDATE()) , MONTH(getdate()) , '01' )
0
 
LVL 28

Expert Comment

by:Pawan Kumar
ID: 41801797
Or this what ever you need ...

SELECT DATEFROMPARTS(YEAR(GETDATE()) , MONTH(getdate()) , DAY(GETDATE()) )

Open in new window

0
 
LVL 28

Expert Comment

by:Pawan Kumar
ID: 41801798
In this you easily do the maths also e.g. month - 1 etc.
0
NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

 
LVL 65

Expert Comment

by:Jim Horn
ID: 41801816
>return only month and year
>but now i want that to be recognized as a date
The above two comments are mutually exclusive, as formatting a datetime into anything that only shows part of the whole value will convert it to a character value.

Would probably help to give is a 'before and after' data mockup of what you're trying to do here, and your overall requirements as we may be able to recommend a better workaround.
0
 
LVL 28

Expert Comment

by:Pawan Kumar
ID: 41801822
If you need mm/dd/yyyy format use below

--

SELECT CONVERT(VARCHAR(10), DATEFROMPARTS(YEAR(GETDATE()) , MONTH(getdate()) , DAY(GETDATE())) ,101)

--

Open in new window

0
 
LVL 69

Expert Comment

by:Scott Pletcher
ID: 41801840
Don't convert to char at all, that just adds complexity and slows things down:

SELECT DATEADD(YEAR, -1, DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()) - 1, 0))

The "standard best-practice" way to adjust the current date to a given time period is:

DATEADD(<time_period>, DATEDIFF(<time_period>, 0, GETDATE()), 0)

That code very flexibly and  efficiently "zeros out" the time and puts you to the start of the specified time period.  Some specific examples:

SELECT
    DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0),
    DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()), 0),
    DATEADD(YEAR, DATEDIFF(YEAR, 0, GETDATE()), 0)

The code above simply adapts the MONTH adjustment to backup one month and then to subtract one year from that.
0
 

Author Comment

by:vbnetcoder
ID: 41801844
Jim - you answered my question. I figured that was the case but wasn't sure. I have a report were i am only interested in month/year so i was hoping there was something to make it be recognized as a year.
0
 
LVL 65

Accepted Solution

by:
Jim Horn earned 500 total points
ID: 41801870
Ok.  

If all you're going to do is display the mm/yy value and never touch it, then varchar is fine.

If this column will be touch in ways such as passed parameters or column sorting where you expect the sort order to behave like a date, then another option is to pass BOTH the mm/yy varchar and datetime value, show the mm/yy column but hide the datetime column, and add logic to your report that when you sort the mm/yy column it actually sorts the set based on the datetime column.
1
 
LVL 69

Expert Comment

by:Scott Pletcher
ID: 41801917
Do any/all conversions from date/datetime to character formats in the last query to process/present the data, since character format is less efficient for SQL to use.
1
 
LVL 69

Expert Comment

by:Scott Pletcher
ID: 41823879
I object to Khowal's claimed solution because "DATEFROMPARTS" is not available in SQL 2008, as specified in the initial q.
0
 
LVL 69

Expert Comment

by:Scott Pletcher
ID: 41823881
I object to Khowal's claimed solution because "DATEFROMPARTS" is not available in SQL 2008, as specified in the initial q.
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
SQL Server - TSQL - Removing duplicates/How to get max records per id 13 45
Nested Case statement 4 37
SQL Quer 4 21
Getting invalid Syntax SQL. 3 15
For both online and offline retail, the cross-channel business is the most recent pattern in the B2C trade space.
I have a large data set and a SSIS package. How can I load this file in multi threading?
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
Via a live example, show how to shrink a transaction log file down to a reasonable size.

809 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