• 1. sql database error: 乡村蓝调

• 1.With the property set this way, any SQL statements from the application that are not bound to the database will result in an SQL error.
  采用这种方式设置该属性，应用程序中任何未绑定到数据库的sql语句都将产生SQL错误。
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• 2.If the tables don't exist (which is the case if the database was just created), an error message is displayed; but as the preceding SQL comments indicate, you can safely ignore those messages.
  如果表不存在(当数据库刚创建时就会出现这种情况)，将显示一条错误消息；但前面的SQL注释指明，您可以安全地忽略这些消息。
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• 3.To force a lock timeout error, establish a first database connection and execute some SQL statements simulating a real transaction on the table employee.
  为了促使一个锁定超时错误发生，我们首先建立一个数据库连接，并执行一些sql语句来模拟表employee上的真实事务。
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