SQL FOR ALL..!!!

## SQL history SQL, which stands for Structured Query Language, is a programming language designed to manage and manipulate relational databases. It provides a standardized way of interacting with databases, allowing users to perform various operations such as querying data,...

March 19, 2024

How to Transpose Columns in Each Group to a Single Row

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How to Transpose Columns in Each Group to a Single Row

We have a database table STAKEHOLDER as follows: We are trying to group the table by CLASS and convert all columns to a same row. Below is the desired result set: SQL code written in Oracle: WITH CTE AS( SELECT UP.CLASS, UP.NS...

March 18, 2024

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The Ultimate SQL SELECT Cheat Sheet

Have you ever found yourself staring blankly at your SQL code, trying to recall the syntax for a SELECT query? Don’t worry; you’re not alone. SQL, with its vast array of commands and clauses, can be daunting to remember every...

March 15, 2024

The difficulty of SQL stems from relational algebra

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The difficulty of SQL stems from relational algebra

In the field of structured data computing, SQL is still the most widely used working language, not only adopted by all relational databases, but also targeted by many new big data platforms. For a certain computing technology, people usually care...

March 14, 2024

What is a Relational Database for Beginners

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What is a Relational Database for Beginners

So, let us take a look real quick at a relational database, as other people refer to it as a SQL database. Over here we have two examples of tables. So, this is how we would store information in a...

March 14, 2024

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PostGreSql-StoryFrom(Day89-100)

Execute the SQL Script using \i with the Correct Path: Once you’re in the psql shell connected to the “test” database, directly provide the path to the SQL script file using the \i meta-command. Ensure you use the correct path...

March 14, 2024

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PostGreSql-StoryFrom(Day89-100)

March 14, 2024

Streamlining String Concatenation in SQL Server with CONCAT_WS

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Streamlining String Concatenation in SQL Server with CONCAT_WS

In SQL Server, concatenating strings from different columns is a common task, particularly when dealing with names or addresses. While traditional methods like using the + operator or CONCAT function are prevalent, CONCAT_WS offers a more efficient approach. This function...

March 13, 2024

Which Scenarios Does ClickHouse Applies to?

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Which Scenarios Does ClickHouse Applies to?

ClickHouse has been popular in recent years as an analytic database. It is noted for the high speed and is often used as the benchmark by vendors of many other analytic databases whose selling points are high performance. Many users...

March 11, 2024

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Why You Should Use a Database

Now, the point I want to drive home with this is that, storing a database, storing a collection of related information on a computer, is extremely useful. And computers are actually great for storing databases. So, I have here two...

March 11, 2024