- Microsoft SQL Server T-SQL date and datetime formats
- Date time formats - mssql datetime
- MSSQL getdate returns current system date and time in standard internal format
SELECT convert(varchar, getdate(), 100) - mon dd yyyy hh:mmAM (or PM)
- Oct 2 2008 11:01AM
SELECT convert(varchar, getdate(), 101) - mm/dd/yyyy - 10/02/2008
SELECT convert(varchar, getdate(), 102) - yyyy.mm.dd - 2008.10.02
SELECT convert(varchar, getdate(), 103) - dd/mm/yyyy
SELECT convert(varchar, getdate(), 104) - dd.mm.yyyy
SELECT convert(varchar, getdate(), 105) - dd-mm-yyyy
SELECT convert(varchar, getdate(), 106) - dd mon yyyy
SELECT convert(varchar, getdate(), 107) - mon dd, yyyy
SELECT convert(varchar, getdate(), 108) - hh:mm:ss
SELECT convert(varchar, getdate(), 109) - mon dd yyyy hh:mm:ss:mmmAM (or PM)
- Oct 2 2008 11:02:44:013AM
SELECT convert(varchar, getdate(), 110) - mm-dd-yyyy
SELECT convert(varchar, getdate(), 111) - yyyy/mm/dd
SELECT convert(varchar, getdate(), 112) - yyyymmdd
SELECT convert(varchar, getdate(), 113) - dd mon yyyy hh:mm:ss:mmm
- 02 Oct 2008 11:02:07:577
SELECT convert(varchar, getdate(), 114) - hh:mm:ss:mmm(24h)
SELECT convert(varchar, getdate(), 120) - yyyy-mm-dd hh:mm:ss(24h)
SELECT convert(varchar, getdate(), 121) - yyyy-mm-dd hh:mm:ss.mmm
SELECT convert(varchar, getdate(), 126) - yyyy-mm-ddThh:mm:ss.mmm
- 2008-10-02T10:52:47.513
- SQL create different date styles with t-sql string functions
SELECT replace(convert(varchar, getdate(), 111), -/-, - -) - yyyy mm dd
SELECT convert(varchar(7), getdate(), 126) - yyyy-mm
SELECT right(convert(varchar, getdate(), 106), 8) - mon yyyy
----
- SQL Server date formatting function - convert datetime to string
----
- SQL datetime functions
- SQL Server date formats
- T-SQL convert dates
- Formatting dates sql server
CREATE FUNCTION dbo.fnFormatDate (@Datetime DATETIME, @FormatMask VARCHAR(32))
RETURNS VARCHAR(32)
AS
BEGIN
DECLARE @StringDate VARCHAR(32)
SET @StringDate = @FormatMask
IF (CHARINDEX (-YYYY-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -YYYY-,
DATENAME(YY, @Datetime))
IF (CHARINDEX (-YY-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -YY-,
RIGHT(DATENAME(YY, @Datetime),2))
IF (CHARINDEX (-Month-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -Month-,
DATENAME(MM, @Datetime))
IF (CHARINDEX (-MON-,@StringDate COLLATE SQL_Latin1_General_CP1_CS_AS)>0)
SET @StringDate = REPLACE(@StringDate, -MON-,
LEFT(UPPER(DATENAME(MM, @Datetime)),3))
IF (CHARINDEX (-Mon-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -Mon-,
LEFT(DATENAME(MM, @Datetime),3))
IF (CHARINDEX (-MM-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -MM-,
RIGHT(-0-+CONVERT(VARCHAR,DATEPART(MM, @Datetime)),2))
IF (CHARINDEX (-M-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -M-,
CONVERT(VARCHAR,DATEPART(MM, @Datetime)))
IF (CHARINDEX (-DD-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -DD-,
RIGHT(-0-+DATENAME(DD, @Datetime),2))
IF (CHARINDEX (-D-,@StringDate) > 0)
SET @StringDate = REPLACE(@StringDate, -D-,
DATENAME(DD, @Datetime))
RETURN @StringDate
END
GO
- Microsoft SQL Server date format function test
- MSSQL formatting dates
SELECT dbo.fnFormatDate (getdate(), -MM/DD/YYYY-) - 01/03/2012
SELECT dbo.fnFormatDate (getdate(), -DD/MM/YYYY-) - 03/01/2012
SELECT dbo.fnFormatDate (getdate(), -M/DD/YYYY-) - 1/03/2012
SELECT dbo.fnFormatDate (getdate(), -M/D/YYYY-) - 1/3/2012
SELECT dbo.fnFormatDate (getdate(), -M/D/YY-) - 1/3/12
SELECT dbo.fnFormatDate (getdate(), -MM/DD/YY-) - 01/03/12
SELECT dbo.fnFormatDate (getdate(), -MON DD, YYYY-) - JAN 03, 2012
SELECT dbo.fnFormatDate (getdate(), -Mon DD, YYYY-) - Jan 03, 2012
SELECT dbo.fnFormatDate (getdate(), -Month DD, YYYY-) - January 03, 2012
SELECT dbo.fnFormatDate (getdate(), -YYYY/MM/DD-) - 2012/01/03
SELECT dbo.fnFormatDate (getdate(), -YYYYMMDD-) - 20120103
SELECT dbo.fnFormatDate (getdate(), -YYYY-MM-DD-) - 2012-01-03
- CURRENT_TIMESTAMP returns current system date and time in standard internal format
SELECT dbo.fnFormatDate (CURRENT_TIMESTAMP,-YY.MM.DD-) - 12.01.03
GO
----
/***** SELECTED SQL DATE/DATETIME FORMATS WITH NAMES *****/
- SQL format datetime
- Default format: Oct 23 2006 10:40AM
SELECT [Default]=CONVERT(varchar,GETDATE(),100)
- US-Style format: 10/23/2006
SELECT [US-Style]=CONVERT(char,GETDATE(),101)
- ANSI format: 2006.10.23
SELECT [ANSI]=CONVERT(char,CURRENT_TIMESTAMP,102)
- UK-Style format: 23/10/2006
SELECT [UK-Style]=CONVERT(char,GETDATE(),103)
- German format: 23.10.2006
SELECT [German]=CONVERT(varchar,GETDATE(),104)
- ISO format: 20061023
SELECT ISO=CONVERT(varchar,GETDATE(),112)
- ISO8601 format: 2008-10-23T19:20:16.003
SELECT [ISO8601]=CONVERT(varchar,GETDATE(),126)
----
- SQL Server datetime formats
- Century date format MM/DD/YYYY usage in a query
- Format dates SQL Server 2005
SELECT TOP (1)
SalesOrderID,
OrderDate = CONVERT(char(10), OrderDate, 101),
OrderDateTime = OrderDate
FROM AdventureWorks.Sales.SalesOrderHeader
/* Result
SalesOrderID OrderDate OrderDateTime
43697 07/01/2001 2001-07-01 00:00:00.000
*/
- SQL update datetime column
- SQL datetime DATEADD
UPDATE Production.Product
SET ModifiedDate=DATEADD(dd,1, ModifiedDate)
WHERE ProductID = 1001
- MM/DD/YY date format
- Datetime format sql
SELECT TOP (1)
SalesOrderID,
OrderDate = CONVERT(varchar(8), OrderDate, 1),
OrderDateTime = OrderDate
FROM AdventureWorks.Sales.SalesOrderHeader
ORDER BY SalesOrderID desc
/* Result
SalesOrderID OrderDate OrderDateTime
75123 07/31/04 2004-07-31 00:00:00.000
*/
- Combining different style formats for date & time
- Datetime formats
- Datetime formats sql
DECLARE @Date DATETIME
SET @Date = -2015-12-22 03:51 PM-
SELECT CONVERT(CHAR(10),@Date,110) + SUBSTRING(CONVERT(varchar,@Date,0),12,8)
- Result: 12-22-2015 3:51PM
- Microsoft SQL Server cast datetime to string
SELECT stringDateTime=CAST (getdate() as varchar)
- Result: Dec 29 2012 3:47AM
----
- SQL Server date and time functions overview
----
- SQL Server CURRENT_TIMESTAMP function
- SQL Server datetime functions
- local NYC - EST - Eastern Standard Time zone
- SQL DATEADD function - SQL DATEDIFF function
SELECT CURRENT_TIMESTAMP - 2012-01-05 07:02:10.577
- SQL Server DATEADD function
SELECT DATEADD(month,2,-2012-12-09-) - 2013-02-09 00:00:00.000
- SQL Server DATEDIFF function
SELECT DATEDIFF(day,-2012-12-09-,-2013-02-09-) - 62
- SQL Server DATENAME function
SELECT DATENAME(month, -2012-12-09-) - December
SELECT DATENAME(weekday, -2012-12-09-) - Sunday
- SQL Server DATEPART function
SELECT DATEPART(month, -2012-12-09-) - 12
- SQL Server DAY function
SELECT DAY(-2012-12-09-) - 9
- SQL Server GETDATE function
- local NYC - EST - Eastern Standard Time zone
SELECT GETDATE() - 2012-01-05 07:02:10.577
- SQL Server GETUTCDATE function
- London - Greenwich Mean Time
SELECT GETUTCDATE() - 2012-01-05 12:02:10.577
- SQL Server MONTH function
SELECT MONTH(-2012-12-09-) - 12
- SQL Server YEAR function
SELECT YEAR(-2012-12-09-) - 2012
----
- T-SQL Date and time function application
- CURRENT_TIMESTAMP and getdate() are the same in T-SQL
----
- SQL first day of the month
- SQL first date of the month
- SQL first day of current month - 2012-01-01 00:00:00.000
SELECT DATEADD(dd,0,DATEADD(mm, DATEDIFF(mm,0,CURRENT_TIMESTAMP),0))
- SQL last day of the month
- SQL last date of the month
- SQL last day of current month - 2012-01-31 00:00:00.000
SELECT DATEADD(dd,-1,DATEADD(mm, DATEDIFF(mm,0,CURRENT_TIMESTAMP)+1,0))
- SQL first day of last month
- SQL first day of previous month - 2011-12-01 00:00:00.000
SELECT DATEADD(mm,-1,DATEADD(mm, DATEDIFF(mm,0,CURRENT_TIMESTAMP),0))
- SQL last day of last month
- SQL last day of previous month - 2011-12-31 00:00:00.000
SELECT DATEADD(dd,-1,DATEADD(mm, DATEDIFF(mm,0,DATEADD(MM,-1,GETDATE()))+1,0))
- SQL first day of next month - 2012-02-01 00:00:00.000
SELECT DATEADD(mm,1,DATEADD(mm, DATEDIFF(mm,0,CURRENT_TIMESTAMP),0))
- SQL last day of next month - 2012-02-28 00:00:00.000
SELECT DATEADD(dd,-1,DATEADD(mm, DATEDIFF(mm,0,DATEADD(MM,1,GETDATE()))+1,0))
GO
- SQL first day of a month - 2012-10-01 00:00:00.000
DECLARE @Date datetime; SET @Date = -2012-10-23-
SELECT DATEADD(dd,0,DATEADD(mm, DATEDIFF(mm,0,@Date),0))
GO
- SQL last day of a month - 2012-03-31 00:00:00.000
DECLARE @Date datetime; SET @Date = -2012-03-15-
SELECT DATEADD(dd,-1,DATEADD(mm, DATEDIFF(mm,0,@Date)+1,0))
GO
- SQL first day of year
- SQL first day of the year - 2012-01-01 00:00:00.000
SELECT DATEADD(yy, DATEDIFF(yy,0,CURRENT_TIMESTAMP), 0)
- SQL last day of year
- SQL last day of the year - 2012-12-31 00:00:00.000
SELECT DATEADD(yy,1, DATEADD(dd, -1, DATEADD(yy,
DATEDIFF(yy,0,CURRENT_TIMESTAMP), 0)))
- SQL last day of last year
- SQL last day of previous year - 2011-12-31 00:00:00.000
SELECT DATEADD(dd,-1,DATEADD(yy,DATEDIFF(yy,0,CURRENT_TIMESTAMP), 0))
GO
- SQL calculate age in years, months, days
- SQL table-valued function
- SQL user-defined function - UDF
- SQL Server age calculation - date difference
- Format dates SQL Server 2008
USE AdventureWorks2008;
GO
CREATE FUNCTION fnAge (@BirthDate DATETIME)
RETURNS @Age TABLE(Years INT,
Months INT,
Days INT)
AS
BEGIN
DECLARE @EndDate DATETIME, @Anniversary DATETIME
SET @EndDate = Getdate()
SET @Anniversary = Dateadd(yy,Datediff(yy,@BirthDate,@EndDate),@BirthDate)
INSERT @Age
SELECT Datediff(yy,@BirthDate,@EndDate) - (CASE
WHEN @Anniversary > @EndDate THEN 1
ELSE 0
END), 0, 0
UPDATE @Age SET Months = Month(@EndDate - @Anniversary) - 1
UPDATE @Age SET Days = Day(@EndDate - @Anniversary) - 1
RETURN
END
GO
- Test table-valued UDF
SELECT * FROM fnAge(-1956-10-23-)
SELECT * FROM dbo.fnAge(-1956-10-23-)
/* Results
Years Months Days
52 4 1
*/
----
- SQL date range between
----
- SQL between dates
USE AdventureWorks;
- SQL between
SELECT POs=COUNT(*) FROM Purchasing.PurchaseOrderHeader
WHERE OrderDate BETWEEN -20040301- AND -20040315-
- Result: 108
- BETWEEN operator is equivalent to >=-AND-.<=
SELECT POs=COUNT(*) FROM Purchasing.PurchaseOrderHeader
WHERE OrderDate
BETWEEN -2004-03-01 00:00:00.000- AND -2004-03-15 00:00:00.000-
/*
Orders with OrderDates
-2004-03-15 00:00:01.000- - 1 second after midnight (12:00AM)
-2004-03-15 00:01:00.000- - 1 minute after midnight
-2004-03-15 01:00:00.000- - 1 hour after midnight
are not included in the two queries above.
*/
- To include the entire day of 2004-03-15 use the following two solutions
SELECT POs=COUNT(*) FROM Purchasing.PurchaseOrderHeader
WHERE OrderDate >= -20040301- AND OrderDate < -20040316-
- SQL between with DATE type (SQL Server 2008)
SELECT POs=COUNT(*) FROM Purchasing.PurchaseOrderHeader
WHERE CONVERT(DATE, OrderDate) BETWEEN -20040301- AND -20040315-
----
- Non-standard format conversion: 2011 December 14
- SQL datetime to string
SELECT [YYYY Month DD] =
CAST(YEAR(GETDATE()) AS VARCHAR(4))+ - -+
DATENAME(MM, GETDATE()) + - - +
CAST(DAY(GETDATE()) AS VARCHAR(2))
- Converting datetime to YYYYMMDDHHMMSS format: 20121214172638
SELECT replace(convert(varchar, getdate(),111),-/-,-) +
replace(convert(varchar, getdate(),108),-:-,-)
- Datetime custom format conversion to YYYY_MM_DD
select CurrentDate=rtrim(year(getdate())) + -_- +
right(-0- + rtrim(month(getdate())),2) + -_- +
right(-0- + rtrim(day(getdate())),2)
- Converting seconds to HH:MM:SS format
declare @Seconds int
set @Seconds = 10000
select TimeSpan=right(-0- +rtrim(@Seconds / 3600),2) + -:- +
right(-0- + rtrim((@Seconds % 3600) / 60),2) + -:- +
right(-0- + rtrim(@Seconds % 60),2)
- Result: 02:46:40
- Test result
select 2*3600 + 46*60 + 40
- Result: 10000
- Set the time portion of a datetime value to 00:00:00.000
- SQL strip time from date
- SQL strip time from datetime
SELECT CURRENT_TIMESTAMP ,DATEADD(dd, DATEDIFF(dd, 0, CURRENT_TIMESTAMP), 0)
- Results: 2014-01-23 05:35:52.793 2014-01-23 00:00:00.000
/*******
VALID DATE RANGES FOR DATE/DATETIME DATA TYPES
SMALLDATETIME date range:
January 1, 1900 through June 6, 2079
DATETIME date range:
January 1, 1753 through December 31, 9999
DATETIME2 date range (SQL Server 2008):
January 1,1 AD through December 31, 9999 AD
DATE date range (SQL Server 2008):
January 1, 1 AD through December 31, 9999 AD
*******/
- Selecting with CONVERT into different styles
- Note: Only Japan & ISO styles can be used in ORDER BY
SELECT TOP(1)
Italy = CONVERT(varchar, OrderDate, 105)
, USA = CONVERT(varchar, OrderDate, 110)
, Japan = CONVERT(varchar, OrderDate, 111)
, ISO = CONVERT(varchar, OrderDate, 112)
FROM AdventureWorks.Purchasing.PurchaseOrderHeader
ORDER BY PurchaseOrderID DESC
/* Results
Italy USA Japan ISO
25-07-2004 07-25-2004 2004/07/25 20040725
*/
- SQL Server convert date to integer
DECLARE @Datetime datetime
SET @Datetime = -2012-10-23 10:21:05.345-
SELECT DateAsInteger = CAST (CONVERT(varchar,@Datetime,112) as INT)
- Result: 20121023
- SQL Server convert integer to datetime
DECLARE @intDate int
SET @intDate = 20120315
SELECT IntegerToDatetime = CAST(CAST(@intDate as varchar) as datetime)
- Result: 2012-03-15 00:00:00.000
----
- SQL Server CONVERT script applying table INSERT/UPDATE
----
- SQL Server convert date
- Datetime column is converted into date only string column
USE tempdb;
GO
CREATE TABLE sqlConvertDateTime (
DatetimeCol datetime,
DateCol char(8));
INSERT sqlConvertDateTime (DatetimeCol) SELECT GETDATE()
UPDATE sqlConvertDateTime
SET DateCol = CONVERT(char(10), DatetimeCol, 112)
SELECT * FROM sqlConvertDateTime
- SQL Server convert datetime
- The string date column is converted into datetime column
UPDATE sqlConvertDateTime
SET DatetimeCol = CONVERT(Datetime, DateCol, 112)
SELECT * FROM sqlConvertDateTime
- Adding a day to the converted datetime column with DATEADD
UPDATE sqlConvertDateTime
SET DatetimeCol = DATEADD(day, 1, CONVERT(Datetime, DateCol, 112))
SELECT * FROM sqlConvertDateTime
- Equivalent formulation
- SQL Server cast datetime
UPDATE sqlConvertDateTime
SET DatetimeCol = DATEADD(dd, 1, CAST(DateCol AS datetime))
SELECT * FROM sqlConvertDateTime
GO
DROP TABLE sqlConvertDateTime
GO
/* First results
DatetimeCol DateCol
2014-12-25 16:04:15.373 20141225 */
/* Second results:
DatetimeCol DateCol
2014-12-25 00:00:00.000 20141225 */
/* Third results:
DatetimeCol DateCol
2014-12-26 00:00:00.000 20141225 */
----
- SQL month sequence - SQL date sequence generation with table variable
- SQL Server cast string to datetime - SQL Server cast datetime to string
- SQL Server insert default values method
DECLARE @Sequence table (Sequence int identity(1,1))
DECLARE @i int; SET @i = 0
DECLARE @StartDate datetime;
SET @StartDate = CAST(CONVERT(varchar, year(getdate()))+
RIGHT(-0-+convert(varchar,month(getdate())),2) + -01- AS DATETIME)
WHILE ( @i < 120)
BEGIN
INSERT @Sequence DEFAULT VALUES
SET @i = @i + 1
END
SELECT MonthSequence = CAST(DATEADD(month, Sequence,@StartDate) AS varchar)
FROM @Sequence
GO
/* Partial results:
MonthSequence
Jan 1 2012 12:00AM
Feb 1 2012 12:00AM
Mar 1 2012 12:00AM
Apr 1 2012 12:00AM
*/
----
----
- SQL Server Server datetime internal storage
- SQL Server datetime formats
----
- SQL Server datetime to hex
SELECT Now=CURRENT_TIMESTAMP, HexNow=CAST(CURRENT_TIMESTAMP AS BINARY(8))
/* Results
Now HexNow
2009-01-02 17:35:59.297 0x00009B850122092D
*/
- SQL Server date part - left 4 bytes - Days since 1900-01-01
SELECT Now=DATEADD(DAY, CONVERT(INT, 0x00009B85), -19000101-)
GO
- Result: 2009-01-02 00:00:00.000
- SQL time part - right 4 bytes - milliseconds since midnight
- 1000/300 is an adjustment factor
- SQL dateadd to Midnight
SELECT Now=DATEADD(MS, (1000.0/300)* CONVERT(BIGINT, 0x0122092D), -2009-01-02-)
GO
- Result: 2009-01-02 17:35:59.290
----
----
- String date and datetime date&time columns usage
- SQL Server datetime formats in tables
----
USE tempdb;
SET NOCOUNT ON;
- SQL Server select into table create
SELECT TOP (5)
FullName=convert(nvarchar(50),FirstName+- -+LastName),
BirthDate = CONVERT(char(8), BirthDate,112),
ModifiedDate = getdate()
INTO Employee
FROM AdventureWorks.HumanResources.Employee e
INNER JOIN AdventureWorks.Person.Contact c
ON c.ContactID = e.ContactID
ORDER BY EmployeeID
GO
- SQL Server alter table
ALTER TABLE Employee ALTER COLUMN FullName nvarchar(50) NOT NULL
GO
ALTER TABLE Employee
ADD CONSTRAINT [PK_Employee] PRIMARY KEY (FullName )
GO
/* Results
Table definition for the Employee table
Note: BirthDate is string date (only)
CREATE TABLE dbo.Employee(
FullName nvarchar(50) NOT NULL PRIMARY KEY,
BirthDate char(8) NULL,
ModifiedDate datetime NOT NULL
)
*/
SELECT * FROM Employee ORDER BY FullName
GO
/* Results
FullName BirthDate ModifiedDate
Guy Gilbert 19720515 2009-01-03 10:10:19.217
Kevin Brown 19770603 2009-01-03 10:10:19.217
Rob Walters 19650123 2009-01-03 10:10:19.217
Roberto Tamburello 19641213 2009-01-03 10:10:19.217
Thierry D-Hers 19490829 2009-01-03 10:10:19.217
*/
- SQL Server age
SELECT FullName, Age = DATEDIFF(YEAR, BirthDate, GETDATE()),
RowMaintenanceDate = CAST (ModifiedDate AS varchar)
FROM Employee ORDER BY FullName
GO
/* Results
FullName Age RowMaintenanceDate
Guy Gilbert 37 Jan 3 2009 10:10AM
Kevin Brown 32 Jan 3 2009 10:10AM
Rob Walters 44 Jan 3 2009 10:10AM
Roberto Tamburello 45 Jan 3 2009 10:10AM
Thierry D-Hers 60 Jan 3 2009 10:10AM
*/
- SQL Server age of Rob Walters on specific dates
- SQL Server string to datetime implicit conversion with DATEADD
SELECT AGE50DATE = DATEADD(YY, 50, -19650123-)
GO
- Result: 2015-01-23 00:00:00.000
- SQL Server datetime to string, Italian format for ModifiedDate
- SQL Server string to datetime implicit conversion with DATEDIFF
SELECT FullName,
AgeDEC31 = DATEDIFF(YEAR, BirthDate, -20141231-),
AgeJAN01 = DATEDIFF(YEAR, BirthDate, -20150101-),
AgeJAN23 = DATEDIFF(YEAR, BirthDate, -20150123-),
AgeJAN24 = DATEDIFF(YEAR, BirthDate, -20150124-),
ModDate = CONVERT(varchar, ModifiedDate, 105)
FROM Employee
WHERE FullName = -Rob Walters-
ORDER BY FullName
GO
/* Results
Important Note: age increments on Jan 1 (not as commonly calculated)
FullName AgeDEC31 AgeJAN01 AgeJAN23 AgeJAN24 ModDate
Rob Walters 49 50 50 50 03-01-2009
*/
----
- SQL combine integer date & time into datetime
----
- Datetime format sql
- SQL stuff
DECLARE @DateTimeAsINT TABLE ( ID int identity(1,1) primary key,
DateAsINT int,
TimeAsINT int
)
- NOTE: leading zeroes in time is for readability only!
INSERT @DateTimeAsINT (DateAsINT, TimeAsINT) VALUES (20121023, 235959)
INSERT @DateTimeAsINT (DateAsINT, TimeAsINT) VALUES (20121023, 010204)
INSERT @DateTimeAsINT (DateAsINT, TimeAsINT) VALUES (20121023, 002350)
INSERT @DateTimeAsINT (DateAsINT, TimeAsINT) VALUES (20121023, 000244)
INSERT @DateTimeAsINT (DateAsINT, TimeAsINT) VALUES (20121023, 000050)
INSERT @DateTimeAsINT (DateAsINT, TimeAsINT) VALUES (20121023, 000006)
SELECT DateAsINT, TimeAsINT,
CONVERT(datetime, CONVERT(varchar(8), DateAsINT) + - -+
STUFF(STUFF ( RIGHT(REPLICATE(-0-, 6) + CONVERT(varchar(6), TimeAsINT), 6),
3, 0, -:-), 6, 0, -:-)) AS DateTimeValue
FROM @DateTimeAsINT
ORDER BY ID
GO
/* Results
DateAsINT TimeAsINT DateTimeValue
20121023 235959 2012-10-23 23:59:59.000
20121023 10204 2012-10-23 01:02:04.000
20121023 2350 2012-10-23 00:23:50.000
20121023 244 2012-10-23 00:02:44.000
20121023 50 2012-10-23 00:00:50.000
20121023 6 2012-10-23 00:00:06.000
*/
----
- SQL Server string to datetime, implicit conversion with assignment
UPDATE Employee SET ModifiedDate = -20150123-
WHERE FullName = -Rob Walters-
GO
SELECT ModifiedDate FROM Employee WHERE FullName = -Rob Walters-
GO
- Result: 2015-01-23 00:00:00.000
/* SQL string date, assemble string date from datetime parts */
- SQL Server cast string to datetime - sql convert string date
- SQL Server number to varchar conversion
- SQL Server leading zeroes for month and day
- SQL Server right string function
UPDATE Employee SET BirthDate =
CONVERT(char(4),YEAR(CAST(-1965-01-23- as DATETIME)))+
RIGHT(-0-+CONVERT(varchar,MONTH(CAST(-1965-01-23- as DATETIME))),2)+
RIGHT(-0-+CONVERT(varchar,DAY(CAST(-1965-01-23- as DATETIME))),2)
WHERE FullName = -Rob Walters-
GO
SELECT BirthDate FROM Employee WHERE FullName = -Rob Walters-
GO
- Result: 19650123
- Perform cleanup action
DROP TABLE Employee
- SQL nocount
SET NOCOUNT OFF;
GO
----
----
- sql isdate function
----
USE tempdb;
- sql newid - random sort
SELECT top(3) SalesOrderID,
stringOrderDate = CAST (OrderDate AS varchar)
INTO DateValidation
FROM AdventureWorks.Sales.SalesOrderHeader
ORDER BY NEWID()
GO
SELECT * FROM DateValidation
/* Results
SalesOrderID stringOrderDate
56720 Oct 26 2003 12:00AM
73737 Jun 25 2004 12:00AM
70573 May 14 2004 12:00AM
*/
- SQL update with top
UPDATE TOP(1) DateValidation
SET stringOrderDate = -Apb 29 2004 12:00AM-
GO
- SQL string to datetime fails without validation
SELECT SalesOrderID, OrderDate = CAST (stringOrderDate as datetime)
FROM DateValidation
GO
/* Msg 242, Level 16, State 3, Line 1
The conversion of a varchar data type to a datetime data type resulted in an
out-of-range value.
*/
- sql isdate - filter for valid dates
SELECT SalesOrderID, OrderDate = CAST (stringOrderDate as datetime)
FROM DateValidation
WHERE ISDATE(stringOrderDate) = 1
GO
/* Results
SalesOrderID OrderDate
73737 2004-06-25 00:00:00.000
70573 2004-05-14 00:00:00.000
*/
- SQL drop table
DROP TABLE DateValidation
Go
----
- SELECT between two specified dates - assumption TIME part is 00:00:00.000
----
- SQL datetime between
- SQL select between two dates
SELECT EmployeeID, RateChangeDate
FROM AdventureWorks.HumanResources.EmployeePayHistory
WHERE RateChangeDate >= -1997-11-01- AND
RateChangeDate < DATEADD(dd,1,-1998-01-05-)
GO
/* Results
EmployeeID RateChangeDate
3 1997-12-12 00:00:00.000
4 1998-01-05 00:00:00.000
*/
/* Equivalent to
- SQL datetime range
SELECT EmployeeID, RateChangeDate
FROM AdventureWorks.HumanResources.EmployeePayHistory
WHERE RateChangeDate >= -1997-11-01 00:00:00- AND
RateChangeDate < -1998-01-06 00:00:00-
GO
*/
----
- SQL datetime language setting
- SQL Nondeterministic function usage - result varies with language settings
SET LANGUAGE -us_english-; -- Jan 12 2015 12:00AM
SELECT US = convert(VARCHAR,convert(DATETIME,-01/12/2015-));
SET LANGUAGE -British-; -- Dec 1 2015 12:00AM
SELECT UK = convert(VARCHAR,convert(DATETIME,-01/12/2015-));
SET LANGUAGE -German-; -- Dez 1 2015 12:00AM
SET LANGUAGE -Deutsch-; -- Dez 1 2015 12:00AM
SELECT Germany = convert(VARCHAR,convert(DATETIME,-01/12/2015-));
SET LANGUAGE -French-; -- d�c 1 2015 12:00AM
SELECT France = convert(VARCHAR,convert(DATETIME,-01/12/2015-));
SET LANGUAGE -Spanish-; -- Dic 1 2015 12:00AM
SELECT Spain = convert(VARCHAR,convert(DATETIME,-01/12/2015-));
SET LANGUAGE -Hungarian-; -- jan 12 2015 12:00AM
SELECT Hungary = convert(VARCHAR,convert(DATETIME,-01/12/2015-));
SET LANGUAGE -us_english-;
GO
----
----
- Function for Monday dates calculation
----
USE AdventureWorks2008;
GO
- SQL user-defined function
- SQL scalar function - UDF
CREATE FUNCTION fnMondayDate
(@Year INT,
@Month INT,
@MondayOrdinal INT)
RETURNS DATETIME
AS
BEGIN
DECLARE @FirstDayOfMonth CHAR(10),
@SeedDate CHAR(10)
SET @FirstDayOfMonth = convert(VARCHAR,@Year) + --- + convert(VARCHAR,@Month) + --01-
SET @SeedDate = -1900-01-01-
RETURN DATEADD(DD,DATEDIFF(DD,@SeedDate,DATEADD(DD,(@MondayOrdinal * 7) - 1,
@FirstDayOfMonth)) / 7 * 7, @SeedDate)
END
GO
- Test Datetime UDF
- Third Monday in Feb, 2015
SELECT dbo.fnMondayDate(2016,2,3)
- 2015-02-16 00:00:00.000
- First Monday of current month
SELECT dbo.fnMondayDate(Year(getdate()),Month(getdate()),1)
- 2009-02-02 00:00:00.000
----
