在LOAD命令中提供相应的select语句，就会隐式地定义游标。

Instead the cursor definition is implicitly done by providing the corresponding SELECT statement within the LOAD command.

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然后，您使用条件型if语句，以检查该命令的返回代码。

Then you use the conditional if statement to check the return code of the command.

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再次调用HISTORY命令来显示缓存中现在有5个命令，包括修改的SELECT语句。

Invoking the HISTORY command again shows that there are now five commands or statements in the cache, including the modified SELECT statement.

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