SQL 如何查找某个位是否打开
SQL how to find if a certain bit is on
Select '5th bit on'
Where 16 & (2^(5-1)) > 0
为什么这行不通?
我只是想看看从十进制到二进制的某个位是否是on/off。
我一定是遗漏了一些非常基本的东西。
^
是 xor operator, not the "power of" operator I suspect you expect it to be. Instead, you can use the power
函数:
Select '5th bit on'
Where 16 & (POWER(2, (5-1))) > 0
Select '5th bit on'
Where 16 & (2^(5-1)) > 0
为什么这行不通? 我只是想看看从十进制到二进制的某个位是否是on/off。 我一定是遗漏了一些非常基本的东西。
^
是 xor operator, not the "power of" operator I suspect you expect it to be. Instead, you can use the power
函数:
Select '5th bit on'
Where 16 & (POWER(2, (5-1))) > 0