Database Journal
MS SQL Oracle DB2 Access MySQL PostgreSQL Sybase PHP SQL Etc SQL Scripts & Samples Links Database Forum

» Database Journal Home
» Database Articles
» Database Tutorials
MS SQL
Oracle
DB2
MS Access
MySQL
» RESOURCES
Database Tools
SQL Scripts & Samples
Links
» Database Forum
» Sitemap
Free Newsletters:
DatabaseDaily  
News Via RSS Feed


follow us on Twitter
Database Journal |DBA Support |SQLCourse |SQLCourse2
 

Featured Database Articles

SQL Scripts & Samples

Posted Feb 8, 2006

Get First/Last Datetime for a date

By DatabaseJournal.com Staff



>>Script Language and Platform: TSQL/SQL Server 2000
If you apply a DatePart function to seperate the date and time, in this case, the index will not be used (because of function usage) and your query may take too much long time.

These two functions will ease your life if you assign the returned values to two variables in use those two variables in your query with syntax.

SELECT listOfColumns 
 FROM MyTable 
Where TransactionDateTime >= @StartDate And TransactionDateTime <= @endDate

Author: Anjum Niaz


SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

-- Returns first moment of any date, 
-- usefull function to be used 
-- to calculated before using in 
-- select statement. 
-- Highly recommended to optimize 
-- queries based on datetime 
-- conditions 

CREATE FUNCTION [GetStartDate]
        (
        @Date DateTime 
        )
RETURNS DateTime 
AS
        BEGIN
                
        RETURN Convert(DateTime, Convert(VarChar(30), @Date, 102) + '' 00:00:00.000 AM'', 121) 
        
        END

GO

CREATE FUNCTION [GetEndDate]
        (
        @Date DateTime 
        )
RETURNS DateTime 
AS
        BEGIN
                
        RETURN Convert(DateTime, Convert(VarChar(30), @Date, 102) + '' 11:59:59.998 PM'', 121) 
        
        END

GO 

Disclaimer: We hope that the information on these script pages is valuable to you. Your use of the information contained in these pages, however, is at your sole risk. All information on these pages is provided "as -is", without any warranty, whether express or implied, of its accuracy, completeness, or fitness for a particular purpose... Disclaimer Continued


Back to Database Journal Home



SQL Scripts & Samples Archives

Comment and Contribute

 


(Maximum characters: 1200). You have characters left.

 

 




Latest Forum Threads
SQL Scripts & Samples Forum
Topic By Replies Updated
sql help!! add 1 August 22nd, 11:58 AM
How To Combine These 2 Queries into 1 Query ? tarek_land 1 June 7th, 08:37 AM
solving query svibuk 1 February 3rd, 06:08 AM
converting from a character string to uniqueidentifier saturnius 4 January 4th, 05:56 AM


















Thanks for your registration, follow us on our social networks to keep up-to-date