打开数据连接失败。
他打开一个命令行窗口，连接到SAMPLE数据库，并尝试更新employee表中的雇员工资(当然这样的尝试会遭到失败)。
He opens a command line window, connects to the SAMPLE database and unsuccessfully tries to update the employee salaries in the employee table. He issues the following SQL statements.
Open()方法打开了到数据库的连接，如果连接失败，则抛出一个IfxException。
The Open() method opens the connection to the database and throws an IfxException if the connection fails.
Open()方法打开了到数据库的连接，如果连接失败，则抛出一个IfxException。
The Open() method opens the connection to the database and throws an IfxException if the connection fails.
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