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Let's talk about how to tell the difference between mysql and oracle. The secret of the text is to be close to the topic. So, no gossip, let's go straight to the following, I believe you will benefit from reading this article on how to distinguish mysql from oracle.

What's the difference between MySQL and Oracle? The characteristics of the two databases are different, so MySQL is used differently than Oracle, and Oracle is used differently than MySQL. Their characteristics are also different. Let's take a look at the differences between MySQL and Oracle.

1. The difference in essence

Oracle database is an object-relational database management system (ORDBMS). It is often called Oracle RDBMS or Oracle for short, and it is a paid database.

MySQL is an open source relational database management system (RDBMS). It is the most widely used RDBMS in the world and runs as a cloud server, providing multi-user access to multiple databases. It is an open source, free database.

2. Database security

MySQL uses three parameters to authenticate users, namely, user name, password, and location; Oracle uses many security features, such as user name, password, profile, local authentication, external authentication, advanced security enhancements, and so on.

3. The difference of SQL grammar.

Oracle's SQL syntax is very different from MySQL. Oracle provides more flexibility for a programming language called PL / SQL. Oracle's SQL * Plus tool provides more commands than MySQL for generating report output and variable definitions.

4. Differences in storage:

Compared to Oracle, MySQL has no tablespaces, role management, snapshots, synonyms and packages, and automatic storage management.

5. The difference between object names:

Although some schema object names are case-insensitive in both Oracle and MySQL, such as columns, stored procedures, indexes, and so on. However, in some cases, the case sensitivity between the two databases is different.

Oracle is case-insensitive for all object names, while some MySQL object names, such as databases and tables, are case-sensitive (depending on the underlying operating system).

6. Running program and external program support:

The Oracle database supports several programming languages written, compiled, and executed from within the database. In addition, to transfer data, the Oracle database uses XML.

MySQL does not support the execution of other languages within the system, nor does it support XML.

7. Comparison of character data types between MySQL and Oracle:

There are some differences in the character types supported in the two databases. For character types, MySQL has CHAR and VARCHAR, and the maximum length allowed is 65535 bytes (CHAR can be up to 65535 bytes, VARCHAR is 65.535 bytes).

However, Oracle supports four character types, that is, all four character types CHAR,NCHAR,VARCHAR2 and NVARCHAR2; require at least 1 byte long; CHAR and NCHAR can be up to 2000 bytes, and NVARCHAR2 and VARCHAR2 have a maximum limit of 4000 bytes. It may be extended in the latest version.

8. Comparison of additional functions between MySQL and Oracle:

MySQL databases do not support any features on their cloud servers, such as Audit Vault. On the other hand, Oracle supports several extensions and programs on its database cloud servers, such as Active Data Guard,Audit Vault,Partitioning and Data Mining.

9. The difference between temporary tables:

Oracle and MySQL handle temporary tables in different ways.

In MySQL, temporary tables are database objects that are visible only to the current user session and are automatically deleted once the session ends.

The definition of temporary tables in Oracle is slightly different from that of MySQL because temporary tables exist once created until they are explicitly deleted and visible to all sessions with appropriate permissions. However, the data in the temporary table is visible only to the user session that inserts the data into the table, and the data may persist during the transaction or user session.

10. Backup types in MySQL and Oracle:

Oracle provides different types of backup tools, such as cold backup, hot backup, export, import, data pump. Oracle provides the most popular backup utility called Recovery Manager (RMAN). With RMAN, we can automate our backup scheduling and restore databases with very few commands or storage scripts.

MySQL has mysqldump and mysqlhotcopy backup tools. There is no utility like RMAN in MySQL.

11. Database management of Oracle and MySQL:

In the database management section, Oracle DBA is more profitable than MySQL DBA. Compared to MySQL, Oracle DBA has a lot of available ranges.

12. Authentication of database:

MySQL certification is easier than Oracle certification.

Unlike Oracle (when set to use database authentication) and most other databases that use only usernames and passwords to authenticate users, MySQL uses other parameters when authenticating users. This location parameter is usually a hostname, IP address, or wildcard.

With this additional parameter, MySQL can further restrict user access to the database to specific hosts or hosts in the domain. In addition, this allows different passwords and permission sets to be enforced for users based on the host to which they are connected. Therefore, the user scott logged in from abc.com may be the same or different from the user scott logged in from xyz.com.

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