正则表达式是一种为复杂搜索指定模式的强大方式。第 23.1 节：REGEXP / RLIKEREGEXP（或其同义词RLIKE）运算符允许基于正则表达式的模式匹配。考虑以下员工表：EMPLOYEE_IDFIRST_NAMELAST_NAMEPHONE_NUMBERSALARY100StevenKing515.123.456724000.00101NeenaKochhar515.123.456817000.00102LexDe Haan515.123.456917000.00103AlexanderHunold590.423.45679000.00104BruceErnst590.423.45686000.00105DavidAustin590.423.45694800.00106ValliPataballa590.423.45604800.00107DianaLorentz590.423.55674200.00108NancyGreenberg515.124.456912000.00