The SQL standard defines four levels of transaction isolation. The most strict is Serializable, which is defined by the standard in a paragraph

PostgreSQL provides facilities to support dynamic tracing of the database server. This allows an external utility to be called at specific

After a query has produced an output table (after the select list has been processed) it can optionally be sorted. If sorting is not chosen, the rows will be returned in an

Namepg_basebackup -- take a base backup of a PostgreSQL cluster

NameCREATE EVENT TRIGGER -- define a new event trigger Synopsis

The examples shown below use tables in the PostgreSQL regression test database. The outputs shown are taken from version 8.3. The behavior

As shown in the previous section, the table expression in the SELECT command constructs an intermediate virtual table by possibly combining tables

The first test to see whether you can access the database server is to try to create a database. A running PostgreSQL server can manage many

The current limitations of PostgreSQL's text search features are: The

NameCREATE POLICY -- define a new row level security policy for a table Synopsis