Database Management Systems
A key-value database (also known as a key-value store and key-value store database) is a type of NoSQL database that uses a simple key/value method to store data.
The key-value part refers to the fact that the database stores data as a collection of key/value pairs. This is a simple method of storing data, and it is known to scale well.
NoSQL is a term that refers loosely to a particular type of database model, or database management system (DBMS).
NoSQL is a very broad term that doesn’t refer to one particular database model. Rather, it refers to a whole variety of different models that don’t fit into the relational model.
Although NoSQL databases have been around since the 1960s, it wasn’t until the early 2000s that the NoSQL approach started to pick up steam, and a whole new generation of NoSQL systems began to hit the market.
This article lists the SQL DROP TABLE syntax, as implemented by various database management systems (DBMSs). The syntax is listed exactly as each vendor has listed it on their website. Click on the applicable link to view more detail about the syntax for a particular vendor.
The DBMSs covered are MySQL, SQL Server, PostgreSQL, and Oracle Database.
Oracle Database is an object-relational database management system (ORDBMS) produced by Oracle Corporation. It is one of the world’s most popular database management systems (DBMSs).
Oracle Database is often shortened to “Oracle” and sometimes “Oracle DB” or “Oracle RDBMS” (although it’s not the only product from Oracle Corporation).
PostgreSQL is an object-relational database management system (ORDBMS). It is an open source system that is known for its close alignment with the SQL standard.
PostgreSQL is one of the world’s most popular database management systems (DBMS), and it is consistently in the top 5 on the DB-Engines ranking list.
This article lists the SQL TRUNCATE syntax, as implemented by various database management systems (DBMSs). The syntax is listed exactly as each vendor has listed it on their website. Click on the applicable link to view more detail about the syntax for a particular vendor.
The DBMSs covered are MySQL, SQL Server, PostgreSQL, and Oracle Database.
This article lists the SQL DELETE syntax, as implemented by various database management systems (DBMSs). The syntax is listed exactly as each vendor has listed it on their website. Click on the applicable link to view more detail about the syntax for a particular vendor.
The DBMSs covered are MySQL, SQL Server, PostgreSQL, and Oracle Database.
This article lists the SQL UPDATE syntax, as implemented by various database management systems (DBMSs). The syntax is listed exactly as each vendor has listed it on their website. Click on the applicable link to view more detail about the syntax for a particular vendor.
The DBMSs covered are MySQL, SQL Server, PostgreSQL, and Oracle Database.
This article lists the SQL INSERT syntax, as implemented by various database management systems (DBMSs). The syntax is listed exactly as each vendor has listed it on their website. Click on the applicable link to view more detail about the syntax for a particular vendor.
The DBMSs covered are MySQL, SQL Server, PostgreSQL, and Oracle Database.
This article lists the SQL SELECT syntax, as implemented by various database management systems (DBMSs). The syntax is listed exactly as each vendor has listed it on their website. Click on the applicable link to view more detail about the syntax for a particular vendor.
The DBMSs covered are MySQL, SQL Server, PostgreSQL, and Oracle Database.