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Filtering data in SQL is done using the WHERE clause, which allows you to specify conditions that the data must meet to be included in the result set12.
Example
To select all customers from Mexico:
SELECT * FROM CustomersWHERE Country = 'Mexico';Using Comparison Operators
You can use various comparison operators to filter data:
=: Equal to
<> or !=: Not equal to
>: Greater than
<: Less than
>=: Greater than or equal to
<=: Less than or equal to
Example:
SELECT * FROM CustomersWHERE CustomerID > 80;Filtering with Logical Operators
You can combine multiple conditions using logical operators like AND, OR, and NOT.
Example:
SELECT * FROM CustomersWHERE Country = 'Mexico' AND City = 'Mexico D.F.';Using LIKE for Pattern Matching
The LIKE operator is used to search for a specified pattern in a column.
Example:
SELECT * FROM CustomersWHERE CustomerName LIKE 'A%';Using IN for Multiple Values
The IN operator allows you to specify multiple values in a WHERE clause.
Example:
SQL WHERE Clause - W3Schools
The WHEREclause is used to filter records. It is used to extract only those records that fulfill a specified condition. See more
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The filter clause extends aggregate functions (sum, avg, count, …) by an additional where clause. The result of the aggregate is built from only the rows that satisfy the additional where clause too. Syntax. The filter clause follows …
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This tutorial shows you how to use the SQL WHERE clause to filter rows from a query based on one or more conditions.
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Jul 18, 2018 · In this article, we'll look at a simple example of filtering SQL queries to reduce the complexity of your data. The key to learning how to filter data in …
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SQL WHERE IN Examples for SELECT, UPDATE, …
Oct 16, 2023 · To complete the examples in this tip, download and install (restore) the AdventureWorks2019 sample database. Often, you will need to retrieve data based on two or more values. In this section, we will show, by example, how …
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Oct 16, 2024 · You can use basic conditional operator, logical operator to filter based upon any condition as well as LIKE operator filter based upon any pattern. You can also filter on rang using IN and BETWEEN clause whose examples …
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SQL WHERE - Guide and Examples including …
Jan 2, 2022 · Use a SQL WHERE clause to specify which rows to include in your query results. Think of the where clause of one large condition. If the condition is true, the row is returned. There are many ways you can create conditions. …
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To retrieve rows that satisfy one or more conditions, you use the WHERE clause in the SELECT statement. Here’s the syntax of the WHERE clause: select_list. FROM . table_name. WHERE …
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Example Analogy: Consider filtering as a fine mesh that only lets through the desired elements. Similarly, in a sales database, filtering helps isolate records for a specific product or time frame, helping in a focused analysis.
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Nov 30, 2023 · In this article, we will look at some basics of filtering and different ways to filter data in SQL. Why We Need to Filter Data? With filtering, you can recover just the subset of data that is useful in the particular table.
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Dec 23, 2024 · This blog explains how to filter, group and sort data using SQL’s WHERE, HAVING, ORDER BY, GROUP BY, and other clauses with real-life examples from the employees and departments tables. Understanding these …
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Across the last few tutorials, we've shown you multiple ways to filter data. To review, we covered. Here's a comprehensive table of the different operators you can use in conjunction with …
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Learn how to effectively use MySQL FILTER techniques with `WHERE`, `HAVING`, and `LIMIT` clauses to refine query results and optimize database performance. Explore practical …
SQL WHERE Clause to Filter Rows for SELECT, UPDATE and …
Feb 9, 2022 · WHERE can be applied to DML (Data Manipulation Language) statements such as SELECT, UPDATE and DELETE to tell SQL Server which rows to return, modify, or remove …
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SQL BETWEEN function: A guide with examples - tricentis.com
Mar 11, 2025 · Practical examples of using BETWEEN in Oracle SQL. The BETWEEN operator is compatible with numeric, date queries, and string matching. Let’s run some examples to …
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Designer Filters decide which rows in the database to load into Excel. You can create a single filter or a combination of several filters. A Column filter lets you filter the fetched rows based on …
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A SQL WHERE clause can be used as a way to filter down SQL query results. It can also be used as a way to join two tables together.
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Nov 8, 2022 · This tutorial includes various examples that demonstrate how to select single and multiple columns, use aliases and column headings, filter data with the WHERE clause, use …
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May 8, 2023 · Write queries that select records that satisfy user-specified conditions. Explain the order in which the clauses in a query are executed. One of the most powerful features of a …
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Data filtering is an important concept in SQL that allows you to extract specific data from a table or database. In this guide, we’ll cover the basics of data filtering in SQL, including how to use the …
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Jul 29, 2024 · It can be used as part of various SQL statements, including SELECT, UPDATE, DELETE, and INSERT, to filter records and only apply the statement to desired rows. The …
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6 days ago · The HAVING clause filters results after aggregation, whereas the WHERE clause filters rows before aggregation. Understanding this difference is crucial for writing efficient …
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Mar 18, 2025 · Examples of the issues that may lead to inefficient query plans are: Non-Sargable Queries; Parameter Sniffing Issues; ... Low-Selectivity Filters; SQL Server 2022 introduced a …
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