| Compound Assignment Operator | Description |
| += | declare @i int = 10 set @i += 3 print @i --13 |
| -= | declare @i int = 10 set @i -= 3 print @i --7 |
| *= | declare @i int = 10 set @i *= 3 print @i --30 |
| /= | declare @i int = 10 set @i /= 3 print @i --3 |
| %= | declare @i int = 10 set @i %= 3 print @i --1 |
| &= | declare @i int = 10 set @i &= 3 print @i --2 |
| |= | declare @i int = 10 set @i |= 3 print @i --11 |
| ^= | declare @i int = 10 set @i ^= 3 print @i --9 |