The Complete Oracle SQL course for Data Analysts -A-Z of SQL
The Complete Oracle SQL course for Data Analysts -A-Z of SQL, Learn Oracle SQL from Basic to Advanced Level.
Oracle database is one of the top and most widely used relational database management systems in the world.
This more advanced beginners course will teach you how to retrieve data from an oracle database.
We will start off by downloading and installing oracle database 21c express which is free to use.
What is SQL?
SQL stands for Structured Query Language
SQL lets you access and manipulate databases
SQL became a standard of the American National Standards Institute (ANSI) in 1986 and of the International Organization for Standardization (ISO) in 1987
What Can SQL do?
SQL can execute queries against a database
SQL can retrieve data from a database
SQL can insert records in a database
SQL can update records in a database
SQL can delete records from a database
SQL can create new databases
SQL can create new tables in a database
SQL can create stored procedures in a database
SQL can create views in a database
SQL can set permissions on tables, procedures, and views
SQL is a Standard – BUT…
Although SQL is an ANSI/ISO standard, there are different versions of the SQL language. However, to be compliant with the ANSI standard, they all support at least the major commands (such as SELECT, UPDATE, DELETE, INSERT, WHERE) in a similar manner.
Note: Most of the SQL database programs also have their own proprietary extensions in addition to the SQL standard!