PostgreSQL

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Array and Custom Data Types in PostgreSQL

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Introduction Just like every other database, PostgreSQL has its own set of basic datatypes, like Boolean, Varchar, Text, Date, Time, etc. We can easily store data like numbers, characters, date, time, etc. using these supported datatypes, but what if we need to store multiple data elements in a single column? Suppose we are storing the […]

5 (2)

2021-09-10

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SQLServerCentral Article

Getting a Query Execution Plan in PostgreSQL

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Introduction You often need to check the performance of a PostgreSQL query you just wrote to look for some way to improve performance. In order to do this, you need a report of the query execution, which is called the execution plan). The query execution plan gives you the entire summary of the query execution […]

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2021-03-18

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SQLServerCentral Article

PostgreSQL WHERE, ORDER BY, and GROUP BY Clauses

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Overview A database clause is a conditional statement used to filter data from the database. There are various database clauses available in PostgreSQL, like Where, Order By, Group By, Having, Distinct, Limit, Fetch. In this first chapter of the tutorial we will cover Where, Order By, Group By clauses with suitable example. WHERE Clause The […]

4.5 (2)

2021-03-11

10,737 reads

SQLServerCentral Article

Rules in PostgreSQL

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We sometimes need to perform a different/alternative actions during database queries. We need it for data protection or data abstraction. The PostgreSQL rule system allows to define an alternative action on insert, update or delete. A rule generates an extra query. As a result, rule execution impacts the performance of the system. Creating Rules A […]

5 (3)

2020-12-03

4,632 reads

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