The SQL WHERE Clause. The WHERE clause is used to filter records. It is used to extract only those records that fulfill a specified condition.

Mar 21, 2014 · To narrow down the number of rows returned by the query, we will add the WHERE clause with a condition for the table clustered index. The SQL Server query execution plan now contains the Clustered index seek. As its tooltip explains, the database engine scans a particular range of rows from the clustered index.

Dec 3, 2024 · In this article, we will learn the WHERE clause in detail—from basic concepts to advanced ones. We’ll cover practical examples, discuss common operators, provide optimization tips, and address real-world use cases. What is the SQL WHERE Clause? The SQL WHERE clause is used to specify a condition while fetching or modifying data in a database.

Dec 4, 2008 · As you can see, that gives quite a lot of detail about how the query will be executed. It tells me that: finally the filter "dept.loc like 'l%' will be applied. This order of application has nothing to do with the way the predicates are ordered in the WHERE clause, as we can show with this re-ordered query: 2 join dept on dept.deptno = emp.deptno.

May 10, 2022 · Learn how to use the SQL WHERE clause to filter rows. In this comprehensive article, we cover comparison operators and the BETWEEN, IN, LIKE, AND, OR, and NOT operators. Filtering output rows is one of the first things …

Mar 1, 2023 · The SQL WHERE clause sets a filter condition for a SQL statement. It extracts only the rows that meet the specified conditions, like retrieving all customers located in a specific area. In this SQL tutorial, we will illustrate the different use cases and options available when using the WHERE clause and demonstrate them using the ...

In the article, we'll review the basics of a SQL WHERE clause and examine how to filter data using the clause and dbForge Query Builder. In addition, we'll share some helpful tips to make your queries work faster using WHERE clauses.

The WHERE clause in SQL filters records from a result set, frequently in conjunction with other clauses, such as SELECT, Update, or Delete. The WHERE clause indicates the conditions that must be met for a record to be included within the result set.

Aug 4, 2021 · In these cases, you'll need to select only the part of the records on which you want to work, those that satisfy a certain condition. This is where SQL's WHERE clause is useful. You write the WHERE clause like this: SELECT column1, column2... FROM …

Nov 30, 2020 · Examples of where clause in SQL: Scenario 1: Fetching all values from Employee table. Scenario 2: Example of where clause using simple condition. We can fetch the values from employees table where manager_id is specific or salary is specific. Scenario 3: Example of where clause using date and character conditions.