目录前言1. 定义注解示例：定义一个简单的注解2. 注解的元注解示例：使用元注解3. 注解的保留策略4. 注解的应用目标5. 运行时处理注解示例：运行时处理注解6. 内置注解7. 自定义注解处理器示例：定义一个简单的注解处
Every time you make use of a derived table, that query is going to be executed. When using a CTE, that result set is pulled back once and only once within a single query.
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