![]() In 1994, two Berkeley graduates converted Postgre to use the SQL interpreter instead of the QUEL one and labeled their version Postgre95. ![]() The last version using the QUEL interpreter was released in 1993. Back then, it was not based on SQL, but on the QUEL query language. In the following years the project was completed and several versions of the Postgre database were released. The new project was based on the ideas used in Ingres, but not on its source code. However, in 1985, the leader of the Ingres project started a new, post-Ingres project, with which he aimed to address the database problems at the time. This software became the foundation of other popular database solutions, such as Sybase, MsSQL and NonStop SQL. Back then, at the University of Berkeley, California, a new database software was created - Ingres. PostgreSQL's origins lead us back to the 1970s. And as a free alternative to powerful corporate applications comes PostgreSQL. And while most of the amateur, non-professional, or open source projects use the light, quick and free MySQL databases, the professional web environments count on expensive powerful databases offering a higher level of security such as Oracle, MsSQL, Sybase. The whole content is structured, easily accessible and editable, and can be transferred or exported to another web application or a newer version of the latter. When it comes to corporate business sites the presence of databases is a mandatory element.īuilding a website which uses databases has many advantages. Dynamic content is starting to replace static content even on personal pages. True - there are many personal static web pages on the Internet working without databases, but in today's dynamic information stream static pages are archaic. ![]() ĭELETE statement is used to delete the existing records present in the database table.Databases are indispensable when it comes to contemporary web applications. UPDATE statement is used to modify the existing values of records present in the database table. Select statement is used to select data from database tables. Syntax INSERT INTO table_name (column1, column2, column3. INSERT Statement is used to insert new records into the database table. Syntax ALTER TABLE table_name1 RENAME to new_table_name1 6. RENAME command is used to rename the table name. DROPĭROP command is used to delete the table along with its data. TRUNCATE command is used to delete the data present in the table but this will not delete the table. Syntax ALTER TABLE Table_name ADD column_name datatype 3. Syntax: CREATE TABLE table_name (ĪLTER command is used to add, modify or delete columns or constraints from the database table. It supports all major operating systems like Linux, Windows, OpenBSD,FreeBSD etc.ĬREATE command is used to create a table, schema or an index.It's the default database server for MacOS.First DBMS which implemented Multi-version concurrency control (MVCC) feature.ACID(Atomicity, Consistency, Isolation, Durability) compliant.Custom Data types and funtions from various programming languaues can be introduced and the good part is compiling entire database is not required. ![]()
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