于右边就为真>=如果左边大于「或等于右边则为真<= 如果左边小于「或等于右边就为真 && 逻辑与运算子 (logical and operator) || 逻辑或运算子 (logical or operator): 范例 x && y x || y 值:真或伪 说明:如果右边的值和左边的值是非零值, && 为真.
2
?运算符
1.逻辑“与”运算符 逻辑“与”运算符(logical AND operator)有时也简称为“与”,它对两个操作数执行逻辑“与”操作,并返回结果。让我们演示一下“与”运算符怎样工作以及提供一个返回值。
双语例句
1
Consider using parentheses to improve readability and avoid mistakes because of logicaloperator precedence.
考虑使用括号来改善可读性和避免由于逻辑操作符的优先级导致的错误。
2
It's best to read such execution plans from the left-lowest operator in the tree, since the logical flow in the plan is from bottom to top and left to right.
因为执行计划中的逻辑流是自下而上、从左到右,所以看此类执行计划时,最好是从树中左下方的操作符开始。
3
The next step is to choose the logicaland or or operator and a second parameter.