Skip to main content

Difference Between SYSDATETIME and GETDATE( )

If we run the following Query,



SELECT GETDATE() AS GTDATE
SELECT SYSDATETIME () as SYSDATE

 


We get same result but difference is GETDATE the precision is till miliseconds and of SYSDATETIME the precision is till nanoseconds.

In SQL Server 2005, We had only one function, GETDATE( ) which returns a DATETIME value. Its precision was till milliSeconds.

But later in SQL Server 2008, onwards, to get Time precision to Nano seconds, they introduced a new Data type called DATETIME2.

Getdate ( ) with returning  DATETIME2 had a problem with precision with nanoseconds.
So SYSDATETIME is introduced which supports till NanoSeconds, which will return DATETIME2 Type and where as Getdate ( ) will return DATETIME type.

DATETIME value has precision upto 3 milliseconds. 

DATETIME2 value has precision upto 100 Nanoseconds.

Labels:

Comments

Post a Comment

Popular posts from this blog

BIG Data, Hadoop – Chapter 2 - Data Life Cycle

Data Life Cycle The data life cycle is pictorial defined as show below:     As we see, in our current system, we capture/ Extract our data, then we store it and later we process for reporting and analytics. But in case of big data, the problem lies in storing and then processing it faster. Hence Hadoop takes this portion, where it stores the data in effective format (Hadoop distributed File System) and also process using its engine (Map Reduce Engine). Since Map Reduce engine or Hadoop engine need data on HDFS format to process, We have favorable tools available in market to do this operation. As an example, Scoop is a tool which converts RDBMS to HDFS. Likewise we have SAP BOD to convert sap system data to HDFS.
73 comments
Read more

How to move multiple files in ssis and also rename simultaneously

There are two ways to achieve this. 1) We can move the flat files and then rename it. 2) While moving files itself, automatic rename should be done. We will do the second type. The criteria is to rename the files while moving from source to destination. So for that, we need FILE SYSTEM TASK to be included. Secondly since we need to move many files, we will use FOR EACH LOOP CONTAINER. To fetch all the files, we can use FOR EACH LOOP task in SSIS. In collection tab, we can select FOREACH FILE enumerator option for fetching files and we can change enumerator configuration Folder option: Points to source where we need to fetch files. Files: will give us idea whether we need to fetch all the files (*.*) or if we give extension like *.txt, it is going to fetch only  .txt files . Once I give Source name in FOR EACH LOOP container, It is going to fetch all the files corresponding to that path. Retrieve file name: This option is used to let the variables mentioned in V...
14 comments
Read more