In most cases, you should catalog the database connections as described in Setting up a connection to a database so that you can test the connection from the command line.
在大多数情况下，应该像建立到数据库的连接中所描述的那样编目数据库连接，以便可以从命令行测试该连接。
If the catalog partition is suspended, then the connection attempt may hang.
如果编目分区被挂起，那么连接尝试将中止。
The first step in the newly opened Catalog window is to add a database connection.
在新打开的Catalog窗口中，第一步是添加一个数据库连接。
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