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I'm trying to understand the following query: select count(distinct Name || '' || Surname) from PEOPLE; What does the double bars mean? What does this query do? In MySQL: select "aaaaa"...
12 kwi 2011 · I'm learning SQL, and a lot of the examples have | (vertical bar) in function parameters. What does it represent? Like this: TRUNC(column|expression, decimal places) between column and expression.
In this blog post, we’re going to break down the various operators used in SQL, their syntax, and how to use them effectively. You will also look at some examples, working with a hypothetical data set to give you a hands-on understanding. Let’s dive in!
17 lut 2021 · What can you do with SQL? Here's a reference guide to the most commonly-used SQL commands, with code examples you can copy-paste.
5 maj 2021 · Common table expressions (CTEs), also known as WITH clauses, are used to create named subqueries that can be referenced in the main query. CTEs are not saved for future use and can be referenced only within the query where they are defined. The basic syntax is: WITH cte_name AS (SELECT … cte body...)
SQL Logical Operators. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
16 sie 2024 · Learn the basics of working with tables in SQL, including how to create, alter, and delete tables, and how to insert and update data. Understand how to use logic functions, perform mathematical calculations, and execute joins to manipulate and analyze your data efficiently.
