当程序一切正常时，删除这些语句并且发送该程序以便在生产环境中安装。
When the program was okay, those statements were removed and the program was sent to be installed in production.
优化器怎样决定如何以它的方式执行您可以发送的大量sql语句？
How does the optimizer decide how to execute the vast array of SQL statements that you can send its way?
JDBC 的基本功能是连接到数据库，并发送 SQL 语句到服务器。
The essential function of JDBC is to connect to the database and send SQL statements to the server.
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