It does not contain any kind of user interface.
How to connect to oracle database plus#
In simple words the SQL PLUS is old fashioned command line interface which we are using to do development of oracle. But we need to know that how we can connect using sys user in SQL PLUS as well. The PL SQL or oracle developers will use the Oracle SQL developer to complete the development tasks related to Oracle. The SQL plus interface is been used by mostly DBA rather than developer. I would like to explain the multiple steps to connect to the Oracle database in different environments. Those are basically used in our application development and management.ġ.How to connect to the oracle using the SQL PLUS?Ģ.How to connect to the oracle using in SQL developer? As per the oracle architecture the Inside container database there are pluggable databases. When user first time logs in to database, he or she will be logged in to the container database. The container database is the key database of Oracle. Before we start, we must need to know that there are container database and pluggable databases in oracle.
How to connect to oracle database how to#
How to connect to Oracle database using sys user? I would like to give you multiple examples of the how to connect to Oracle database using sys user. In this article I would like to give you the answer of the important question. In my previous article I have given multiple SQL queries. (ADDRESS=(PROTOCOL=tcp)(HOST=133.22.67.112)(PORT=1521)))įor each of these configurations there are situation where they make sense.How to connect to Oracle database using Sys user? You can avoid the SCAN listener and still have a load balancing and a fail over if you use =(DESCRIPTION= You also can connect directly to a node VIP, but then you have no load balancing nor a failover if the server is down, e.g. Of course you cannot connect if this IP is down. This paper I already cited in this answer that maybe also helpful to you.īut you can also only to connect to one SCAN IP address, e.g. This example is from the Oracle Whitepaper Oracle Single Client Access Name (SCAN), June 2013, page 12p. Here the IP addresses are the SCAN listener addresses. (ADDRESS_LIST= (LOAD_BALANCE=on)(FAILOVER=ON) If possible, you can define the fail_over/load_balance features that would be usually by the DNS server on the client side: =(DESCRIPTION= I you have not DNS you have a lot of possibilities: After the client reached a SCAN listener this listener will forward it to the vip-listener of one of the cluster nodes. The cluster takes care that no all listener run on one node only. This makes the SCAN listener high available, if one scan listener process is down, two others may be still available. If Oracle client wants to connect by using the scan DNS name he will get a list of the three IPs in a random order, He will try them one by one until he succeeded. If you have a DNS then the idea is to configure three IP address in round robin system on the DNS server. # Defaultġ27.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 Since there is no DNS I had to configure /etc/host like so for both nodes. Here's some information regarding my lab.ĬRS-4638: Oracle High Availability Services is onlineĬRS-4537: Cluster Ready Services is onlineĬRS-4529: Cluster Synchronization Services is online I didn't configure DNS (I was stuck for 4 days and the video guide didn't actually show how to configure it), so now I'm stuck trying to connect to this database from DBeaver before I program my node app. I'm not sure how to do it! I suppose I have to connect to the SCAN network? But I had configured it as a private network in each machine's network adapter. For a college project, I have to set up a RAC Instance and an application, I already managed to configure my RAC lab by using virtual machines by using this video guide, now I just need to program an application to connect to my RAC instance but.