The new value comparison operators will report an error if either operand in the comparison contains more than one value, so using them expedites detection of the error.
如果比较的一个操作数包含多个值,新的值比较运算符将报告错误,因此使用这些运算符可以迅速有效地检测错误。
Any attempt to perform a string comparison on an employee ID will then fail with a type error at query run time.
在查询运行时,尝试在雇员ID上执行字符串比较将遭到失败,并产生一个类型错误。
Like the previous set of test operators, comparison test operators are a handy way to perform error checking or to test values against another value.
与前一组测试操作符一样,比较测试操作符是执行错误检查或根据另一个值测试值的简便方法。
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