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I have a situation where i need to get the integer value from a literal hex. Example: "ff" equals 255 in decimal, but if i use the HEX("ff") function it returns 6666. Is it possible to get it to return 255? Like a=10, b=11... and so on

Thank you

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If you need to convert hexadecimal representation to decimal one then you must use CONV() function.

SELECT CONV('ff', 16, 10);
| CONV('ff', 16, 10) |
| :----------------- |
| 255                |

db<>fiddle here

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