convert varchar to date sqlserver


convert varchar to date sqlserver



I have a day in varchar and month and year also in varchar they are separated how to convert it in date format in SQL server


varchar


varchar


date





show some sample input data
– Chanukya
Jul 3 at 9:38





We can't see your data. Please provide some samples. This sounds like, however, you've made the mistake of storing your data as the wrong data type, and (unsurprisingly) its come to back to bite you. Alwats use the correct data type for your data. stores dates as a date, times as a time, date && times and datetime2, numerics as a int/decimal, etc, etc. varchar is not a "one size fits all` datatype. sql_variant almost fulfils that, but still, you should be using the proper data type when you can.
– Larnu
Jul 3 at 9:38



date


time


datetime2


int


decimal


varchar


sql_variant





Concatenate and convert
– apomene
Jul 3 at 9:38





You can also use DATEFROMPARTS().
– HoneyBadger
Jul 3 at 9:39


DATEFROMPARTS()




2 Answers
2


DECLARE @Year nvarchar(50) = '2018'
DECLARE @Month nvarchar(50) = '7'
DECLARE @Day nvarchar(50) = '3'

SELECT DATEFROMPARTS(@Year, @Month, @Day)



use CONVERT() or CAST() to convert


SELECT CONVERT(DATETIME, year_column + month_column + '01') as DateTimeColumn





i use cast mais but is display an error
– malak laghoz
Jul 3 at 10:04






select cast(cast(p.Year*10000 + p.Month*100 + p.Day as varchar(255)) as date) FROM Personnel p SELECT CAST(CONCAT(CAST(p.Year AS VARCHAR(4)), '-',CAST( p.Month AS VARCHAR(2)), '-',CAST(p.Day AS VARCHAR(2))) AS DATE) FROM Personnel p SELECT convert(date, CONVERT(nvarchar(10), Year) + '-' + CONVERT(nvarchar(10), Month) + '-' + CONVERT(nvarchar(10), Day)) as 'Date' FROM Personnel;
– malak laghoz
Jul 3 at 10:05





@malaklaghoz please update your original question with the query
– Squirrel
Jul 3 at 13:54






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