In this blog post which is a roundup of the performance blog series I want to complete the picture of our NoSQL performance test and include some of the. The benefit of an HTTP API would be easier access via tools that dont support the PostgreSQL protocol, such as curl, web browsers, new programming. Pgident. conf is used to map identUnix usernames to PostgreSQL usernames. This may be of help Annotated postgresql. QuerySet API reference This document describes the details of the QuerySet API. It builds on the material presented in the model and database query guides, so you. SQL is a language where one task can be solved multiple ways with different efficiency. You can see effective use of PostgreSQLs possibilities on this page. Postgre. SQL Array. Summary in this tutorial, we will show you how to work with Postgre. SQL array and introduce you to some handy functions for array manipulation. Array plays an important role in Postgre. SQL.  Every data type has its own companion array type e. In case you define your own data type, Postgre. SQL creates a corresponding array type in the background for you. Postgre. SQL allows you to define a column to be an array of any valid data type including built in type, user defined type or enumerated type. The following CREATE TABLE statement creates the contacts table with the phones column is defined as an array of text. The phones column is a one dimensional array that holds various phone numbers that a contact may have. Insert Postgre. SQL array values. The following statement inserts a new contact into the contacts table. INSERTINTOcontactsname,phonesWe used the ARRAY constructor to construct an array and insert it into the contacts table. Check Driving License Uttar Pradesh Map. You can also use curly braces as follows INSERTINTOcontactsname,phones4. The statement above inserts two rows into the contacts table. Notice that when you use curly braces, you use single quotes to wrap the array and double quotes to wrap text array items. Query array data. You use the SELECT statement to query array data as follows We access array elements using the subscript within square brackets. By default, Postgre. SQL uses one based numbering for array elements. It means the first array element starts with number 1. Suppose, we want to get the contacts name and the first phone number, we use the following query We can use array element in the WHERE clause as the condition to filter the rows. For example, to find out who has the phone number 4. Modifying Postgre. SQL array. Postgre. SQL allows you to update each element of an array or  the whole array. The following statement updates the second phone number of William Gate. SETphones24. Lets check it again. The following statement updates an array as a whole. SETphones4. 08 5. We verify the update using the following statement. Search in Postgre. Winrar Archiver Software. Rocky Balboa Games Pc. SQL Array. Suppose, we want to know who has the phone number 4. ANY function as follows 4. ANYphones Expand Arrays. Postgre. SQL provides the unnest function to expand an array to a list of rows. For example,  the following query expands all phone numbers of the phones array. In this tutorial, we have shown you how to work with Postgre. SQL array data type and introduced you to some of the most important array operators and functions.