SQL Server convert from string to smalldatetime

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-- SQL Server convert from string to smalldatetime

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-- T-SQL convert from format mm/dd/yyyy to smalldatetime

SELECT CONVERT(smalldatetime, '10/23/2016', 101)

-- 2016-10-23 00:00:00

-- MSSQL convert from format dd/mm/yyyy to smalldatetime

SELECT CONVERT(smalldatetime, '23/10/2016', 103)

-- 2016-10-23 00:00:00

-- Month 23 is out of range

SELECT CONVERT(smalldatetime, '23/10/2016', 101)

/* Msg 242, Level 16, State 3, Line 1

The conversion of a varchar data type to a smalldatetime data type resulted

in an out-of-range value.

*/

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-- Translate/convert string/text hours and minutes to seconds

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DECLARE @TimeStr varchar(16) = '20:49:30'

SELECT   PARSENAME(REPLACE(@TimeStr,':','.'),1)

       + PARSENAME(REPLACE(@TimeStr,':','.'),2) * 60

       + PARSENAME(REPLACE(@TimeStr,':','.'),3) * 3600

-- 74970

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Converting string dates from a table

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-- Converting string dates from a table

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-- Create and populate a test table with a string date

USE tempdb;

SELECT

      DepartmentID,

      LastUpdate=CONVERT(varchar,

                 dateadd(day, DepartmentID, ModifiedDate),100)

INTO DeptInfo

FROM AdventureWorks.HumanResources.Department

SELECT * FROM DeptInfo

/* Partial results

DepartmentID      LastUpdate

1                       Jun  2 1998 12:00AM

2                       Jun  3 1998 12:00AM

*/

-- Convert string date column to datetime

SELECT

      DepartmentID,

      LastChangeDate=convert(datetime, LastUpdate)

FROM DeptInfo

/* Partial results

DepartmentID            LastChangeDate

1                       1998-06-02 00:00:00.000

2                       1998-06-03 00:00:00.000

*/

DROP TABLE DeptInfo

GO

MSSQL replace string function

-- SQL date & time eliminating dividing characters

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-- MSSQL replace string function

-- T-SQL string concatenate (+)

USE AdventureWorks2008;

SELECT replace(convert(VARCHAR(10),getdate(),102),'.','')

-- 20120315

SELECT replace(convert(VARCHAR(10),getdate(),111),'/','')

-- 20120315  

-- SQL triple replace

SELECT replace(replace(replace(convert(VARCHAR(25),

       getdate(),20),'-',''), ':',''),' ','')

-- 20120529090427

-- T-SQL concatenating from a date and a time conversion

SELECT replace(convert(VARCHAR(10),getdate(),111),'/','') +

       replace(convert(VARCHAR(8),getdate(),108),':','')

-- 20120315085654

SQL date styles and SET Date format in SQL

 USE AdventureWorks

-- Selected named date styles

DECLARE @DateTimeValue varchar(32)

-- US-Style

-- Convert string to datetime sql - sql convert string to datetime

SELECT @DateTimeValue = '10/23/2016'

SELECT StringDate=@DateTimeValue,

[US-Style] = CONVERT(datetime, @DatetimeValue)

SELECT @DateTimeValue = '10/23/2016 23:01:05'

SELECT StringDate = @DateTimeValue,

[US-Style] = CONVERT(datetime, @DatetimeValue)

-- UK-Style, British/French

SELECT @DateTimeValue = '23/10/16 23:01:05'

SELECT StringDate = @DateTimeValue,

[UK-Style] = CONVERT(datetime, @DatetimeValue, 3)

SELECT @DateTimeValue = '23/10/2016 04:01 PM'

SELECT StringDate = @DateTimeValue,

[UK-Style] = CONVERT(datetime, @DatetimeValue, 103)

-- German-Style

SELECT @DateTimeValue = '23.10.16 23:01:05'

SELECT StringDate = @DateTimeValue,

[German-Style] = CONVERT(datetime, @DatetimeValue, 4)

SELECT @DateTimeValue = '23.10.2016 04:01 PM'

SELECT StringDate = @DateTimeValue,

[German-Style] = CONVERT(datetime, @DatetimeValue, 104)

-- Double conversion to US-Style 107 with century: Oct 23, 2016

SET @DateTimeValue='10/23/16'

SELECT StringDate=@DateTimeValue,

[US-Style] = CONVERT(varchar, CONVERT(datetime, @DateTimeValue),107)

-- SQL dateformat setting

USE AdventureWorks2008;

SELECT convert(datetime,'14/05/08')

/* 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.

*/

SET DATEFORMAT ymd

SELECT convert(datetime,'14/05/08')   -- 2014-05-08 00:00:00.000

-- Setting DATEFORMAT to UK-Style

SET DATEFORMAT dmy

SELECT convert(datetime,'20/05/14')   -- 2014-05-20 00:00:00.000

-- Setting DATEFORMAT to US-Style

SET DATEFORMAT mdy

SELECT convert(datetime,'05/20/14')   -- 2014-05-20 00:00:00.000

SELECT convert(datetime,'05/20/2014') -- 2014-05-20 00:00:00.000
GO

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