EXEC user-defined variable EXEC的用法和樣例：
例句
- The value of a user-defined variable can be a literal or an expression.
用戶定義變數的值可以是文字或表達式。 - The user-defined variables that are used in parameter bindings are usually defined with data types that are compatible with the data types of parameters to which they are mapped.
在參數綁定中使用的用戶定義變數通常是以與映射到它們的參數的數據類型兼容的數據類型來定義的。
