本节介绍了如何在 MySQL 中书写字面值。这些包括字符串、数字、十六进制和位值、布尔值以及 NULL。本节还涵盖了在处理 MySQL 中这些基本类型时可能遇到的各种细微差别。This section describes how to write literal values in MySQL. These include strings, numbers, hexadecimal and bit values, boolean values, and NULL. The section also covers various nuances that you may encounter when dealing with these basic types in MySQL.