Sqlplus command to list all databases with examples. Connect to database with the username & password 4.
Sqlplus command to list all databases with examples The SQL*Plus, SQL, and PL/SQL command languages are powerful enough to serve the needs of users with some database experience, yet straightforward enough for new users who are just learning to work with the Oracle Database. This Quick Reference has the following topics: Alphabetic List of SQL*Plus Commands Starting and Leaving SQL*Plus Starting Up and Shutting Down a Database Entering and May 13, 2014 · 2 Your sqlplus line looks correct, verify the following: You can connect as sysdba on the database server itself. This is especially useful for storing complex commands or frequently used reports. Connect to database as sysdba and check the current database user 3. These examples include listing all databases, filtering results with LIKE, and excluding specific databases using NOT LIKE Example 1: Listing All Databases This command returns the list of all the databases available on a server or a host and Feb 15, 2012 · I want to connect to an oracle database located on another host using sqlplus. ora file that you can modify. SQL is a standard language for storing, manipulating and retrieving data in databases. For example, setting an operating system environment variable only affects SQL*Plus sessions started subsequently. This command-line tool enables users to execute T-SQL statements, run scripts, and automate various tasks. Exit from SQL*Plus 5. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. In this article, we will learn about How to Show or List Databases by understanding the various methods with the help of examples and so on. Could be a big security issue (or turn into a big security issue). For detailed information on each command, refer to the SQL*Plus User's Guide and Reference. This article presents some some basic techniques for creating Windows batch files and UNIX/Linux shell scripts that connect to SQL*Plus and RMAN. All of these basic SQL commands work on Oracle, SQL Server, MySQL, and PostgreSQL, unless otherwise indicated. Mar 13, 2009 · 22 With newer versions of client tools, there are multiple options to format the query output. This article lists all of those commands, what they do, and what they look like. DDL - Data Definition Language DDL (Data Definition Language) consists of SQL commands that can be used for defining, altering and deleting database structures such as tables, indexes and schemas. Summary: This tutorial introduces you to an Oracle sample database and shows you how to load it into the Oracle Database Server. The SQL*Plus language is easy to use. Oct 28, 2021 · In this article, we will discuss all the methods to list all tables in the oracle SQL Database. For example, setting an operating system environment variable does not effect the current SQL*Plus session, it only effects SQL*Plus sessions started subsequently. In this note i will show how to list all Oracle “databases” (equivalent to SHOW DATABASES command in MySQL), get the current schema name and how to switch to a different schemas using the command-line interface of SQL*Plus. Edit the statement in the SQL*Plus You can continue a long SQL*Plus command by typing a hyphen at the end of the line and pressing Return. Step 3: Start SQL*Plus Start SQL*Plus. For example, For the various popular database systems, how do you list all the columns in a table? Mar 5, 2014 · The most common approach is to put the databases you're connecting to into your tnsnames. It simply deals with descriptions of the database schema and is used to create and modify the structure of database objects in the The SQL*Plus, SQL, and PL/SQL command languages are powerful enough to serve the needs of users with some database experience, yet straightforward enough for new users who are just learning to work with the Oracle Database. I want to be able to display the resulting data from a select in a pretty way, not all columns under others. Recap In this blog post, we discussed how to display databases in Oracle 11g using SQL*Plus. May 25, 2021 · SQL*Plus provides an interactive and batch processing environment that dispatches commands to the SQL and PL/SQL engines. Save the contents of the buffer into a file 8. Administrators, in turn, employ this database to perform user account management, password landing, and configuration of authentication settings. For example, to rename a column labeled LAST_NAME with the heading "Family Name", enter the command: About this Quick Reference This Quick Reference shows iSQL*Plus buttons and icons, and iSQL*Plus and SQL*Plus command syntax. You can work either in the interactive SQL*Plus command-line interface (CLI) or in Oracle SQL Developer through a Java-based GUI. This page suggested adding an item on my tnsnames to connect to that database local_SID = (DESCRIPTION = (ADDRES In this tutorial, you will learn how to list users in the Oracle Database using the ALL_USERS, DBA_USERS, and USER_USERS views. Unlike graphical tools like SQL Developer, SQL*Plus is lightweight, scriptable, and ideal for automation. We have three types of a subset of tables available to use as identifiers which in turn help us to sort the required table names. You can tnsping the listener from the computer you are trying to connect This Quick Reference shows SQL*Plus command syntax. Nov 22, 2024 · SELECT * FROM DBA_USERS; This command will display a list of all the schemas or users in Oracle, including the TestDB schema. Here, we will discuss the SQL*Plus commands, and understand how to use the SQL*Plus command-line argument. If you wish, however, you can Mar 23, 2023 · In this quick reference SQL Cheat Sheet, we will show Oracle SQL and PostgreSQL commands with examples. For example, to rename a column labeled LAST_NAME with the heading "Family Name", enter the command: Feb 6, 2025 · Discover all ways to connect to an Oracle database using SQL*Plus with clear examples for each method, including remote and secure login. Jul 15, 2020 · SQL, or Structured Query Language, contains a range of commands for interacting with the database. sql file, which is a bunch of oracle pl/sql commands and I want to create a shell script to run these commands. Find the contents of the SQL*Plus buffer 7. Not all commands or command parameters are shown. SQL Statements Most of the actions you need to perform on a database are done with SQL statements. Jul 23, 2025 · SHOW DATABASES; Examples of SQL Show Databases The Examples of SQL Show Databases demonstrate how to use the SHOW DATABASES command in various scenarios. SQL*Plus displays a right angle-bracket (>) as a prompt for each additional line. It provides an interface to interact with the database, run queries, execute scripts, and perform administrative tasks. Shows the current setting for the number of rows that SQL*Plus will prefetch from the database at one time. When you finish entering the command, you can press Return. The rest is to spool it to a file or save the output as a file depending on the client tool. Database management systems provide means to perform these tasks easily. Introduction to the OT Oracle sample database We provide you with an Oracle sample database named OT, which is based on a global fictitious company that sells computer hardware, including storage, motherboards, RAM, video cards, and CPUs. Jun 9, 2010 · With help of this command show databases; I can see databases in MySQL. You can write scripts which contain SQL*Plus, SQL and PL/SQL commands, which you can retrieve and edit. PL/SQL Show/List Databases How to show tables in Oracle Database When working with databases, you often need to check tables in your databases, access certain tables or list all existing tables. SQL statements consist of keywords that are easy to understand. This section explains how to use these two primary interfaces to the SQL and PL/SQL engines. I usually recommend creating a file or using here document so you can protect the username/password from being viewed with "ps -ef" command in Unix/Linux. SQL*Plus User's Guide and Reference for information about SQL*Plus, Oracle's version of SQL Oracle Database Sample Schemas for information about the HR sample schema that is used for examples in this chapter Feb 25, 2025 · What Is SQL*Plus? SQL*Plus is a powerful command-line tool for executing SQL commands in Oracle databases. ora; usually, your client installation contains an example tnsnames. For example, to rename a column labeled LAST_NAME with the heading "Family Name", enter the command: SQL*Plus Quick Reference T his Quick Reference shows the syntax for SQL*Plus commands. Connect to database with the username & password 4. SQL*Plus is a command-line tool that provides access to the Oracle RDBMS. Feb 25, 2025 · What Is SQL*Plus? SQL*Plus is a powerful command-line tool for executing SQL commands in Oracle databases. SQL*Plus enables you to: Enter SQL*Plus commands to configure the SQL*Plus environment Startup and shutdown an Oracle database Connect to an Oracle database Enter and execute SQL commands and PL/SQL blocks Format and print query results SQL*Plus is available on several Just be aware that on Unix/Linux your username/password can be seen by anyone that can run "ps -ef" command if you place it directly on the command line . Step 4: Submit the SQL*Plus CONNECT Command Submit the SQL*Plus CONNECT command to initially connect to the Oracle database instance or at any time to reconnect as a different user. The commands shown in Table A-1 are SQL*Plus commands available in the command-line interface. Jun 6, 2024 · SQL*Plus is a command-line tool for Oracle Database that allows users to interact with the database using SQL and PL/SQL commands. How do I query an Oracle database to display the names of all tables in it? Suppresses all SQL*Plus information and prompt messages, including the command prompt, the echoing of commands, and the banner normally displayed when you start SQL*Plus. Suppose that user/pass@server is my credentials. Here are few of the ways: SQL*Plus Using the SQL*Plus commands you could format to get your desired output. Feb 22, 2020 · Getting Help With sqlplus sqlplus does not have a man page, but provides help when you pass -h/-help: $ sqlplus -h Connecting to an Oracle Database Using SQL*Plus The basic syntax to connect as user alice with password qwerty to a database FOO which is located on db. This Quick Reference has the following topics: Alphabetic List of SQL*Plus Commands Starting and Leaving SQL*Plus Starting Up and Shutting Down a Database Entering and Executing Commands Manipulating SQL, SQL*Plus and PL/SQL Commands Formatting Query Jul 23, 2025 · PL/SQL is the procedural extension of and used in Oracle Database and provides powerful capabilities for database programming and management. The company maintains SQL*Plus commands, for formatting query results, setting options, and editing and storing SQL commands and PL/SQL blocks The manner in which you continue a command on additional lines, end a command, or execute a command differs depending on the type of command you wish to enter and run. You can ping the database server from the computer you are trying to connect from. tld and listens on port 1521 (default port) is: The SQL*Plus, SQL, and PL/SQL command languages are powerful enough to serve the needs of users with some database experience, yet straightforward enough for new users who are just learning to work with the Oracle Database. How to show the available databases in Oracle? Aug 19, 2020 · The schema/user in Oracle can be considered as an equivalent to a “database” concept in MySQL, PostgreSQL or MS SQL. Oracle SQL Developer provides a SQL Worksheet that you can use to query data, by writing simple or complex SQL statements. Operating system commands entered from a SQL*Plus session using the HOST command do not affect the current SQL*Plus session. Display the structure of any table 6. databases view or using the sp_databases or sp_helpdb stored procedures. Mar 8, 2021 · Getting a list of databases in different SQL vendors is done using a range of different commands. These commands cause SQL*Plus to cease displaying titles on reports, but do not clear the current definitions of the titles. Use SPOOL to spool the output to a file. SQL*Plus, and its command-line user interface, Windows GUI, and i SQL*Plus web-based user interface are installed by default when you install the Oracle Database. If you wish, you can type a space before typing the hyphen. SQL*Plus commands, for formatting query results, setting options, and editing and storing SQL commands and PL/SQL blocks The manner in which you continue a command on additional lines, end a command, or execute a command differs depending on the type of command you wish to enter and run. Oct 1, 2024 · I have a . If the username Tutorial on How to Take Backups and Perform Recovery of an Oracle Database with Examples. domain. . The following SQL statement returns all records from a table named "Customers": Nov 12, 2025 · SQL Commands 1. You can connect as the user you are trying to on the database server itself. It enables you to enter and run SQL, PL/SQL, and SQL*Plus commands and statements to: Query, insert, and update data Execute PL/SQL procedures Examine table and object definitions Develop and run batch scripts Perform database administration You can use SQL Command Line to generate About this Quick Reference This Quick Reference shows SQL*Plus command syntax. Suppresses all SQL*Plus information and prompt messages, including the command prompt, the echoing of commands, and the banner normally displayed when you start SQL*Plus. Startup and shutdown an Oracle database Connect to an Oracle database Enter and execute SQL commands and PL/SQL blocks Format and print query results SQL*Plus is available on several platforms. You may restore the current definitions by entering: Use the odacli list-databases command to list all databases on the appliance. For example, to rename a column labeled LAST_NAME with the heading "Family Name", enter the command: Learn how to startup and shutdown container databases (CDB) and pluggable databases (PDB) in Oracle 12c Release 1 (12. For more information about setting the number of rows that SQL*Plus will prefetch from the database at one time, see SET ROWPREFETCH. In this How-To, we look at the most basic of these, select all the data in a table, and restricting this query by reducing the columns or rows you retrieve. In this guide, we'll use sqlcmd to demonstrate how to view lists of databases. Here is the way sqlplus displays my table data: But I want to show them as: Name | Startup and shutdown an Oracle database Connect to an Oracle database Enter and execute SQL commands and PL/SQL blocks Format and print query results SQL*Plus is available on several platforms. For example, MySQL has the SHOW TABLES command; however, other DBMSs do not support that function directly. Each vendor's command is different, but hopefully this guide helps you in remembering what those commands are. You do not need to end a SQL*Plus command with a semicolon. Overview of SQL Command Line SQL Command Line (SQL*Plus) is a command-line tool for accessing Oracle Database XE. Connect to sqlplus without connecting to Oracle database 2. Feb 17, 2021 · What can you do with SQL? Here's a reference guide to the most commonly-used SQL commands, with code examples you can copy-paste. SQLPLUS basic commands: 1. In SQL Server, you can list all the databases on a server instance by querying the sys. This tutorial shows you step by step how to use the Oracle CREATE TABLE statement to create a new table in the Oracle Database. SQL*Plus Quick Start SQL*Plus Resources xviii SQL*Plus Overview xviii SQL*Plus Prerequisites xx Starting SQL*Plus Command-line xx About Starting SQL*Plus Instant Client xxi About Connecting to a Different Database xxii About Sample Schemas and SQL*Plus xxii Running your first Query xxiii About Exiting SQL*Plus xxiv Part I SQL*Plus Getting Started In SQL*Plus command-line, the use of an external editor in combination with the @, @@ or START commands is an effective method of creating and executing generic scripts. Running SQL Commands Running PL/SQL Blocks Running SQL*Plus Commands System Variables that Affect How Commands Run Saving Changes to the Database Automatically Stopping a Command while it is Running Running Host Operating System Commands Getting Help Listing a Table Definition Listing PL/SQL Definitions Controlling the Display Interpreting The SQL*Plus, SQL, and PL/SQL command languages are powerful enough to serve the needs of users with some database experience, yet straightforward enough for new users who are just learning to work with the Oracle Database. We learned that Oracle does not have a simple database model like MySQL or MS SQL Server. 1). Jul 23, 2025 · Likewise, it may incorporate 5 tables to wit: user, db, tables_priv, columns_priv, and host all hold the information about users, databases, and their permissions. Operating system commands entered from a SQL*Plus session using the HOST command do not effect the current SQL*Plus session.