建立出錯在SQL中加入

Question

SELECT permission.bit,permission.name 
FROM user 
LEFT JOIN permission ON user.role & permission.bit 
WHERE user.id = 1 

我有這樣的查詢，我得到這個錯誤：

Msg 4145, Level 15, State 1, Line 3
An expression of non-boolean type specified in a context where a condition is expected, near 'bit'.

Answer 1

我覺得找你試圖做一個按位比較

SELECT permission.bit,permission.name 
FROM user LEFT JOIN permission 
    ON user.role & permission.bit <> 0 
WHERE user.id = 1