Every SQL query you write returns rows, but rarely do you want all of them. The WHERE clause is the mechanism that lets you state, precisely and declaratively, which rows qualify: customers in a particular region, orders above a dollar threshold, product names that begin with a certain prefix, or records where a value was never recorded at all. Understanding WHERE is the foundation for nearly everything else in this module, because joins, grouped summaries, and subqueries all depend on your ability to express conditions accurately.
In this topic you will work through the building blocks one at a time: the basic structure of a WHERE clause, the comparison operators (=, <>, <, >, <=, >=, BETWEEN), the logical operators AND, OR, and NOT, pattern matching with LIKE and its wildcards, set membership with IN and NOT IN, and the special handling that NULL requires through IS NULL and IS NOT NULL. The last subtopic ties these together: combining several conditions in one predicate, where operator precedence and parentheses determine whether your query means what you think it means.
As you watch the videos below, pay attention to the exact syntax used, especially how string literals are quoted, how wildcards (% and _) behave, and why NULL cannot be tested with the equals sign. Try pausing and predicting which rows a given condition will return before the presenter runs the query — that habit is what turns syntax recognition into real query-writing skill.
This installment of Microsoft's T-SQL beginner series focuses on sorting and filtering query results, so it should cover the WHERE clause in the context of a full SELECT statement along with ORDER BY. Expect demonstrations of filtering conditions written in Transact-SQL against sample tables, likely including comparison operators and ways to restrict which rows are returned.
It comes directly from Microsoft Developer, so the syntax and terminology match the SQL Server/T-SQL dialect authoritatively, and placing WHERE alongside sorting shows how filtering fits into the overall shape of a query rather than in isolation.
A tutorial that introduces the SELECT statement together with the WHERE clause and walks through SQL operators with worked examples. Based on its title and placement in a full SQL course playlist, it should demonstrate comparison and logical operators used inside filter conditions on sample data.
It is an entry-level, example-driven treatment that maps closely to the first three subtopics (introduction to WHERE, comparison operators, and AND/OR/NOT), making it a good first pass before you tackle the more specialized operators.
This tutorial concentrates on three specific SQL Server operators used inside WHERE conditions: IN for set membership, BETWEEN for ranges, and LIKE for pattern matching. The description indicates it demonstrates how to apply each operator to write more targeted queries.
It gives dedicated coverage to the IN/NOT IN and LIKE-with-wildcards subtopics that shorter introductory videos often mention only briefly, and the range operator BETWEEN is a natural companion to the comparison operators you will already have seen.
These three videos together support MO2 most directly: the Microsoft Developer and Rishabh Mishra videos establish WHERE clause structure, comparison operators, and the logical operators AND, OR, and NOT, while the Tech Yatra tutorial extends that foundation to IN, BETWEEN, and LIKE pattern matching. Together they give you the operator vocabulary needed to filter rows precisely before joining tables (MO1), to recognize that WHERE acts on individual rows prior to grouping — the distinction you will need for MO3 and MO4 — and to write the conditions that later host subqueries in the WHERE clause (MO5). Note that NULL handling with IS NULL and IS NOT NULL may receive limited attention in these videos, so review the course readings on that subtopic to complete your coverage.
These videos were chosen from YouTube on October 2, 2026. Each has captions; the player turns them on. Videos on YouTube can be changed or removed — if one no longer plays, tell your instructor. If a player does not appear, use its Watch on YouTube link.