20 Jul 2017 Dorota Wdzięczna An Illustrated Guide to the SQL INNER JOIN What is an SQL INNER JOIN, and how does it work? Let's find out! In my last article, I discussed the CROSS JOIN operation in SQL. Today, we'll look at INNER JOIN and how to use it. Is it the same as a JOIN? How many tables can you link with an INNER JOIN? These are all good questions. Let's look at the answers! What is an INNER JOIN? Read more 7 Jul 2017 Dorota Wdzięczna An Illustrated Guide to the SQL CROSS JOIN What is an SQL CROSS JOIN statement? When should you use it? When shouldn't you use it? This post will tell you what you need to know about CROSS JOIN. You already know that you can use the SQL JOIN statement to join one or more tables that share a matching record. And if you're read the LearnSQL's post Learning SQL JOINs Using Real Life Situations, you know that there are many types of JOINs. Read more 6 Jun 2017 Dorota Wdzięczna Using CASE with Data Modifying Statements What happens when you combine CASE with SQL's data modifying statements? Find out in this article. The CASE expression is a very useful part of SQL and one that you'll employ frequently. We've already covered what the CASE expression does, how to format it, and how to use it in a SELECT statement in "Using CASE to Add Logic to a SELECT". Another article, "How to Sort Records with the ORDER BY Clause" Read more 18 May 2017 Dorota Wdzięczna How to Sort Records with the ORDER BY Clause Relational databases don't store records in alphabetical, numerical, ascending, or in any particular order. The only way to order records in the result set is to use the ORDER BY clause. You can use this clause to order rows by a column, a list of columns, or an expression. You can also order rows using the CASE expression. In this post, we'll take a look at the ORDER BY clause – how to write it, how it works, and what it does. Read more 7 May 2017 Dorota Wdzięczna Using CASE to Add Logic to a SELECT As you write an SQL query, you may need to get values from multiple columns and change values from one form to another. The simple way to achieve this goal is to add a CASE expression to your SELECT statement. In this article, we'll introduce you to the syntax, formats, and uses of the CASE expression. The CASE expression is a conditional expression: it evaluates data and returns a result. Read more 20 Apr 2017 Dorota Wdzięczna How to Use LIKE in SQL: SQL Pattern Matching SQL pattern matching is a very important and useful ability. In this article, we look at how you can perform it using LIKE in SQL. SQL Pattern matching is a very simple concept. It allows you to search strings and substrings and find certain characters or groups of characters. Apart from SQL, this operation can be performed in many other programming languages. In this article, we’ll examine how you can use LIKE in SQL to search substrings. Read more «« « 1 2 3 4 » »»