Oracle 11g Tutorial Pdf

[Maral Mende]

Ingeneral, a database is a collection of data treated as a unit. A database management system (DBMS) stores, manages and retrieves a large amount of data in a multi-user environment so that many users can access the same data concurrently.

Oracle Database is a robust object relational database that provides efficient and effective solutions for database users such as delivering high performance, protecting users from unauthorized access, and enabling fast failure recovery.

A database schema is a collection of metadata that describes the relationship between the data in a database. A schema can be simply described as the "layout" of a database or the blueprint that outlines how data is organized into tables.

Schema objects are database objects that contain data or that govern or perform operations on data. By definition, each schema object belongs to a specific schema. The following are commonly used schema objects:

In this section, you execute the SELECT statement to query tables in the HR schema. You also use the ORDER BY and WHERE clauses within the SELECT statement to sort and restrict data in the result set.

In this section, you execute the SELECT statement to retrieve data from tables and views. You can select rows and columns that you want to return in the output. In its simplest form, a SELECT statement must contain the following:

You can display specific columns of data in a table by specifying the column names in the SELECT statement. Execute the following statement to view the JOB_ID and JOB_TITLE columns in the JOBS table:

In this section, you use the WHERE clause to restrict the rows that are returned from the SELECT query. A WHERE clause contains a condition that must be met. It directly follows the FROM clause. If the condition is true, the row that meets the condition is returned.

In this section, you use the ORDER BY clause to sort the rows that are retrieved from the SELECT statement. You specify the column based on the rows that must be sorted. You also specify the ASC keyword to display rows in ascending order (default), and you specify the DESC keyword to display rows in descending order.

Execute the following SELECT statement to retrieve the LAST_NAME, JOB_ID, and HIRE_DATE columns of employees who belong to the SA_REP job ID. Sort the rows in ascending order based on the HIRE_DATE column.

In this section, you create a schema named ONLINE_SHOPPE. This schema portrays an online store that operates with a customer base and commodities. Information about customers is stored in the CUSTOMERS table, information about commodities is stored in the COMMODITIES table and order details are stored in the ORDERS table.

Database administrators perform many tasks. One of their more common tasks is creating database users and assigning them unique usernames. After users log in to the database with their username and password, they can issue database SQL statements to create objects, query objects, and manage the database.

When multiple users access database objects, you can control the authorization of the objects with privileges. Privileges control whether a user can modify an object that is owned by another user. They are granted or revoked either by:

You use the GRANT statement to assign privileges to users and roles. To assign privileges, you must have been assigned either the ADMIN OPTION or the GRANT ANY PRIVILEGE system privilege.

Syntax: GRANT TO ;

When you create a user with the CREATE USER statement, the user's privilege domain is empty by default. The administrator assigns privileges to the user based on the tasks that the user may perform in the future. In this tutorial, the ONLINE_SHOPPE user establishes a session, creates a table, and writes DML statements against tables. Execute the following statements to assign the required privileges to the ONLINE_SHOPPE user:

In this section, you use the COMMIT and ROLLBACK statements to change data permanently. You use the ROLLBACK statement to undo the work that was performed in your current transaction and you use the COMMIT statement to save the work that was performed in your current transaction.

In this section, you execute the REVOKE statement to revoke user and role system privileges. To revoke a system privilege or a role, you must be assigned the privilege with the ADMIN OPTION.

Syntax: REVOKE FROM ;

Our Oracle tutorial includes all topics of Oracle database such as insert record, update record, delete record, select record, create table, drop table etc. There are also given Oracle interview questions to help you better understand the Oracle database.

PLSQL stands for "Procedural Language extensions to SQL", and is an extension of SQL that is used in Oracle. PLSQL is closely integrated into the SQL language, yet it adds programming constructs that are not native to SQL.

Our tutorial will start with the basics of Oracle such as how to retrieve and manipulate data. Then we will move to the more advanced topics such as how to create tables, functions, procedures, triggers, tablespaces, and schemas. We will conclude with a review of the functions that are proprietary to Oracle.

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We recommend getting started with CellOracle using the provided demo dataset.When you want to apply CellOracle to your own scRNA-seq or scATAC-seq dataset, please refer to the following tutorials to learn how to prepare input data.

This tutorial assumes that you have adequate Python programming experience. In particular, we assume you are familiar with the following python data science libraries: jupyter, pandas, and matplotlib.

Also, this tutorial assume that you are familiar with basic scRNA-seq data analysis. In particular, we assume you basic understanding of scRNA-seq analysis using Scanpy and Anndata , which is a python toolkit for single-cell analysis.

CellOracle is a python package. For the installation of CellOracle, we recommend using Anaconda , If you are not familiar with Anaconda or python environment management, please use our pre-built docker image.

If you are running CellOracle for the first time, we recommend getting started with the GRN model construction and network analysis and then, proceed to In silico gene perturbation with GRNs.We provide demo scRNA-seq dataset and base-GRN data as follows.The demo scRNA-seq dataset and base GRN data can be loaded within the notebook.

Using these tutorials, you can easily start CellOracle analysis with this dataset.You can reproduce hematopoiesis network analysis and perturbation simulation results that are shown in our bioRxiv preprint .

Before you can develop and run WebLogic-based applications, you must first create a domain. The Configuration Wizard guides you through the process of creating a new domain quickly and easily, by selecting the product components you want to include in your domain.

In a WebLogic Server domain, machines can be defined to represent physical computers that host one or more Oracle WebLogic Server instances. Machine definitions help WebLogic Server choose backup servers for session replication. Machine definitions also include WebLogic Node Manager configuration.

This tutorial shows you how to create and configure machines by using the Oracle WebLogic Server 12c (12.2.1) administration console.

In a production environment, WebLogic Server instances are often distributed across multiple domains, machines, and geographic locations. Node Manager is a WebLogic Server utility that enables you to start, shut down, and restart the administration server and managed servers from a remote location. Although Node Manager is not required, it is recommended if your WebLogic Server environment hosts applications with high availability requirements.

A Node Manager process is not associated with a specific WebLogic domain, but with a particular machine. You can use the same Node Manager process to control server instances from any WebLogic Server domain, as long as those server instances reside on the same machine as the Node Manager process.

A WebLogic Server cluster consists of multiple managed servers running simultaneously, running the same applications, and working together to provide increased scalability and reliability. A cluster appears to a client as one WebLogic Server instance. Web application client requests go to the cluster proxy, which passes those requests to one of the servers in the cluster. A cluster proxy can be a web server, a hardware load balancer, or even another instance of WebLogic Server itself. The managed servers that make up a cluster can run on the same machine or on different machines. For increased reliability, managed servers in a cluster typically run on more than one machine.

This tutorial shows you how to use the Oracle WebLogic Server 12c (12.2.1) administration console to create a basic cluster and add servers to it. Additional tutorials extend this cluster's capabilities to support load balancing and failover of Java Platform, Enterprise Edition applications.

A data source is an object that enables a Java Database Connectivity (JDBC) client to obtain a database connection. The data source has a collection of database connections called a connection pool. An application can request a connection from the data source, use the connection to access the database, and then close the connection. Rather than actually close the connection, however, the data source places it back in the connection pool to be used again. Data sources can be created as part of the configuration of an instance of WebLogic Server. When that server comes up, (or the data source is deployed), the server creates database connections to fill the connection pool of its data source.

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