Menu
I am a software developer. I have used mysql for years and now I am about to have my first encounter with oracle in a project.
I was just told that I should be careful that the sql behaves quite differently in some cases. I have no idea what to expect. I am mostly looking for obvious stuff and typical beginner mistakes.
For example I was told that oracle as no auto increment.
That's the type of stuff I am looking for. I'd be grateful for any further knowledge that helps avoid creating new solutions to problems already solved.
456
MySQL support only two characters that are CHAR and VARCHAR. Oracle supports four different characters that are CHAR, VARCHAR2, NCHAR, and NVARCHAR2. It offers only two backup mechanisms that are mysqlhotcopy and mysqldump. It offers many backup mechanisms that are backup, hot backup, import, export, etc.
SQL is primarily used to query and operate database systems. MySQL allows you to handle, store, modify and delete data and store data in an organized way. SQL does not support any connector. MySQL comes with an in-built tool known as MySQL Workbench that facilitates creating, designing, and building databases.
Key Differences Between Oracle and MySQL While both MySQL and Oracle provide the same architecture with the Relational Model and offer many standard features such as a proprietary software license, there are some critical differences between the two tools. MySQL provides a GPL software license, while Oracle doesn't.
SQL Dialects: SummarySQL Server, Oracle, MySQL, and PostgreSQL are all different databases that have their own slightly different SQL dialects. The SQL Standard is an official ANSI/ISO document that defines the syntax of SQL. No database is fully compatible with the standard.
For example I was told that oracle as no auto increment.
Oracle has sequences; it's just a different notation. The idea of a column value that's automatically incremented on INSERT is certainly there.
Oracle will have you add primary and foreign keys as constraints, separate from the table definition.
PostgreSQL is the closest thing to Oracle among the open source databases. It, too, has sequences.
135
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
