Consider the following example: SELECT NULL OR TRUE -- Results in True In this case, the fact that the value on the left of OR is unknowable is irrelevant, because the outcome of the OR operation would be True regardless of the value on the left.
考慮下面的例子： SELECT NULL OR TRUE -- Results in True 在這種情況下，OR 左邊的未知值這一事實是無關緊要的，因為 OR 的操作結果將是 True，而不管左邊的值如何。