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I receive data in a certain format. Dates are numeric(8,0). For example 20120101 = YYYYMMDD
There exists rows with values like (0,1,2,3,6) in that date field, thus not a date.
I want to check if it is a date and convert it, else it can be null.
Now the following code works, but I was hoping there is a better way.
(CASE WHEN [invoice_date] LIKE '________' --There are 8 underscores
THEN convert(datetime, cast([invoice_date] as char(8)))
END) AS Invoice_Date
Any help will be appreciated.
476
SQL Server ISDATE() FunctionThe ISDATE() function checks an expression and returns 1 if it is a valid date, otherwise 0.
In SQL Server, you can use the ISDATE() function to check if a value is a valid date. To be more specific, this function only checks whether the value is a valid date, time, or datetime value, but not a datetime2 value. If you provide a datetime2 value, ISDATE() will tell you it's not a date (it will return 0 ).
Using the Date. One way to check if a string is date string with JavaScript is to use the Date. parse method. Date. parse returns a timestamp in milliseconds if the string is a valid date.
use isdate function like ..
(CASE WHEN ISDATE (invoice_date) = 1
THEN convert(datetime, cast([invoice_date] as char(8)))
END) AS Invoice_Date
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