JDBC可调用语句中的命名参数。

Named parameters in a JDBC callable statement.

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可调用语句也需要先作准备，然后使用set方法设置它们的参数。

Callable statements also need to be prepared first, and then their parameters are set using the set methods. Parameters value can be set by either of two ways.

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在创建预备语句（包括可调用语句）时，在创建时捕捉到 SQL 字符串参数。

When creating a prepared statement (including a callable statement), the SQL string argument is captured at creation time.

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