You can use a SIGNAL statement to raise an error condition if the business rule defined in your trigger is violated.

如果违反了您在触发器中定义的业务规则，就可以使用signal语句来抛出一个错误条件信号。

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In the case of the DB2 example in the left column of Table 3, if a particular SQL statement fails and generates an error, control is passed to the condition handler.

对于表3左侧列的DB 2示例，如果某条sql语句失败并生成一个错误，那么控制将被传递给条件处理程序。

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This code relies on the assertion statement to handle the error condition.

这段代码依赖断言语句来处理错误条件。

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This code relies on the assertion statement to handle the error condition.

这段代码依赖断言语句来处理错误条件。

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