How do you convert an integer into a string of hex? I want to convert the int into a format that I can use as a color on my page for example '#ff0000'.
So for example:
--This converts my int to hex:
CONVERT(VARBINARY(8), Color) Color,
And I want to do something like this:
'#' + CONVERT(NVARCHAR(10), CONVERT(VARBINARY(8), Color)) Color
But converting a varbinary string just converts it to an ascii character rather than returning the actual hex string
Using GUI. Then we can use the GUI to change the data type of the table from an int into a string. In SSMS, we can use the Design option to change the data type, by right clicking on the table name. In the designer, change the data type of OrderQty from an int into nvarchar(50) and save the changes.
HEX() : This function in MySQL is used to return an equivalent hexadecimal string value of a string or numeric Input. If the input is a string then each byte of each character in the string is converted to two hexadecimal digits.
To convert a hexadecimal string to a numberUse the ToInt32(String, Int32) method to convert the number expressed in base-16 to an integer. The first argument of the ToInt32(String, Int32) method is the string to convert. The second argument describes what base the number is expressed in; hexadecimal is base 16.
You can use varbinary type of column to store the hexa values. You can cast/convert them to integer as and when required using the cast/convert functions.
There is a built in function to generate hex strings from binary values
SELECT
'#' + sys.fn_varbintohexstr(CONVERT(BINARY(3), 0)),
'#' + sys.fn_varbintohexstr(CONVERT(BINARY(3), 255))
You need binary(3)
to ensure the correct length of the output string
This is wrong. You get 4 hex digits because 0 and 255 here are 4 byte int
values
SELECT
'#' + sys.fn_varbintohexstr(CONVERT(varBINARY(8), 0)),
'#' + sys.fn_varbintohexstr(CONVERT(varBINARY(8), 255))
Oct 2017 Update:
The conversion is now built-in to SQL Server (since 2008!!) so we can simply use CONVERT
SELECT '#' + CONVERT(char(6), CONVERT(BINARY(3), 2570841), 2)
Conversion from int to varbinary is implicit in SQL SERVER, so you can also use SELECT sys.fn_varbintohexstr(1234567) and you're done.
But beware BIGINT values, because long numeric literals are interpreted as DECIMAL values and not as BIGINT. Decimals have prefix data to hold the precision, and the byte order is reversed, and that's why you get this:
select sys.fn_varbintohexstr(2147483648)
returns 0x0A00000100000080
You need to convert explicitly to BIGINT:
select select sys.fn_varbintohexstr(CONVERT(BIGINT(2147483648))
returns 0x0000000080000000
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