replace number with string name

[varann]

Hello,

how can I replace numbers from -1 to 15 with string in MSSQL? For e.g.:
-1 = TEST1
1 = TEST2
2 = TEST3
...
12 = TEST123
13 = TEST1234

Thank you!
Fredy

[NeoPa]

You give no explanation and your example makes it very unclear what is behind your thinking.

Nevertheless, a table of matching values (that match your logic whatever that may be) would work for you.