Convert string to date sql4/4/2023 ![]() See How to Format the Date & Time in SQL Server for more information and examples. That way we don’t need to remember the format of that locale. One benefit of this function is that it allows us to specify a locale to use for the date/time format. Converting it to a string enables us to apply formatting to the date so that it’s easier for humans to read.Īnother way to format dates is with the FORMAT() function. That’s because date types don’t support string characters like / and other formatting niceties we might impose on the date. Note that by doing this, we need to convert the date to a string. A value of 101 returns the date as mm/dd/yyyy. This determines the format that the date is returned. I used CONVERT() because this function allows us to add an argument to specify the style of the resulting date. Here I added the CONVERT() function to do another conversion. We can use the following query to do that: SELECT CONVERT( nvarchar, CAST( CAST( 20281030 AS char(8)) AS date), 101 ) For example, we might want to format the date as mm/dd/yyyy. One possible reason for converting the yyyymmdd number to an actual date type might be to format the date. Here’s an example of converting our yyyymmdd number to a datetime2 type: SELECT CAST( CAST( 20281030 AS char(8)) AS datetime2 ) Īs expected, a whole bunch of zeros are added. In such cases, a time component would be added, set to all zeros (e.g. I could have converted it to another date/time value such as datetime or datetime2. It didn’t necessarily have to be the actual date type that I converted to. In this example we provided a string literal, whereas in the first example we explicitly converted the int to a char(8) string. That’s because SQL Server allows us to convert the string to a date. In this case it successfully converted the value to a date. SQL Server tells us that the conversion is not allowed.īut here’s what happens when we pass the number as a string literal: SELECT CAST( '20281030' AS date ) Result: Msg 529, Level 16, State 2, Line 1Įxplicit conversion from data type int to date is not allowed. Here’s an example of what happens when we try to directly convert the int to a date: SELECT CAST( 20281030 AS date ) But it does allow us to convert an int to a string, and then that string to the date type. The reason for this is because SQL Server doesn’t allow an explicit conversion from the int type to the date type. ![]() The syntax for this is CONVERT (datetime, format). In this case I used CAST() to convert the number to a char(8), then I used another CAST() to convert that char(8) to a date. You can convert a DATETIME to a DATE using the CONVERT function. Here’s an example to demonstrate: SELECT CAST( CAST( 20281030 AS char(8)) AS date ) ![]() This will enable us to perform date operations against it that we might not be able to do when it’s still in numeric form. When working with SQL Server, if we’re given a number that represents a date in the yyyymmdd format, we can use functions like CAST() or CONVERT() to convert that number to a valid date type. ![]()
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