Common Table Expression Basics
Learn the basics of how CTEs work with a few examples in this article.
2023-05-31 (first published: 2023-05-19)
5,753 reads
sabyda
- Skills: Java, Spring boot, React, Azure, AWS, Postgres, Oracle, Websphere, Angular, Blockchain, Corda
Establishing a Connection to PostgreSQL with GoLang
Learn how to use golang to connect to a PostgreSQL database.
2022-07-22
16,454 reads
Array and Custom Data Types in PostgreSQL
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 […]
2021-09-10
12,665 reads
Conditional DELETE and INSERT in PostgreSQL
Introduction We are comfortable with inserting/deleting record(s) into/from a table. But we sometimes get confused when we need to insert or delete records conditionally from a table. Let us look at an example. Example scenario Suppose we have a table, called ALL_EMPLOYEES, which contains all employees' information who are working or had ever worked for […]
2021-06-18 (first published: 2021-05-12)
10,176 reads
Getting a Query Execution Plan in PostgreSQL
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 […]
2021-03-18
8,697 reads
The CAST operator in PostgreSQL
Introduction Cast is a technique in PostgreSQL with which we can convert a value of one datatype into another. We can perform various cast operations in PostgreSQL for converting one datatype to another, such as the String datatype to the Integer datatype (or the Boolean datatype or datetime datatype) and vice versa. This article will […]
2021-01-21
71,482 reads
Rules in PostgreSQL
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 […]
2020-12-03
8,578 reads
Getting Started with Gremlin
Apache TinkerPop is an open source graph computing framework. A graph computing network is a set of vertices and edges in the network. If we compare a graph database to traditional relational databases, we can assume that every row in a table of a relational database is equivalent to a vertex in graph network. Similarly, […]
2020-10-15
3,936 reads
Blogs
SQL Data Pipelines: The Ultimate Guide to Streamlining Your Data Flow
Want to build a data analytics foundation that transforms raw data into valuable business...
Using SQL Compare in Read-Only Databases
By Steve Jones
Recently a customer asked if SQL Compare and SQL Data Compare can be used...
T-SQL Tuesday #179 Roundup: The Data Detective Toolkit
By Tim Mitchell
Earlier this month, I hosted the monthly T-SQL Tuesday invitation in which I asked,...
Forums
Date Type ETL Question
I'm not sure that I'm posting this in the right section, so please mods...
Possible oddity in msdb.dbo.backupset
Hi all I've written a script to keep track of how long backups...
Operand data type varchar is invalid for sum operator
I have this view [dbo].[Asset Metrics - Client(Rama -Client-Test)], which makes use of multiple...
Question of the Day
Data Migration Assistant Sources
In the current (Sep 2024) Data Migration Assistant, what are the possible sources for on-premises SQL Server instances?
See possible answers