如何配置数据库Oracle

# TNSNAMES.ORA Network Configuration File: C:\oracle\ora90\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.


ORACLE90 =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.90)(PORT = 1522))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = oracle)
    )
  )

ORACLE79 =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.79)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = orcl)
    )
  )


//该文件的默认路径为C:\Oracle\ora90\network\ADMIN\tnsnames.ora。
注意：要先装Oracle客户端，然后在上面这个路径中配置上数据库路径。
然后再安装pl/sql,就可以连接数据库了。