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In SQL, the terms DISTINCT and UNIQUE serve different purposes, despite their similar meanings in everyday language. Understanding their distinct roles is crucial for effective database management.
DISTINCT Keyword
The DISTINCT keyword is used in the SELECT statement to remove duplicate rows from the result set. It ensures that the output contains only unique rows based on the specified columns. This is particularly useful when you want to retrieve a list of unique values from a table that may contain duplicates.
Example:
Consider a table named Cars with the following data:
| Id | Brand | Model | ProductionYear | |------|-------|---------|----------------| | AQ16 | Audi | Q7 | 2011 | | FK19 | Ford | Kuga | 2019 | | JC07 | Jeep | Cherokee| 2012 | | JW15 | Jeep | Wrangler| 2015 | | TS14 | Tesla | Model S | 2014 | | TY20 | Tesla | Model Y | 2020 |
To get a list of unique car brands produced after 2011, you can use the following query:
What’s the Difference Between UNIQUE and …
May 20, 2021 · The UNIQUE keyword in SQL plays the role of a database constraint; it ensures there are no duplicate values stored in a particular column or a set of columns. On the other hand, the DISTINCT keyword is used in the …
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See more on pediaa.comUnique is a command or a constraint in SQL that ensures that all values in a column are different. Moreover, both unique and primary keyprovides a guarantee for the uniqueness of a column or a set of columns. Generally, the primary key already has the unique constraint. It is possible to have multiple unique constraint…- Estimated Reading Time: 3 mins
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Despite their initial similarity, "UNIQUE" and "DISTINCT" stand out for their unique functions among them. We'll discuss the special and noticeable distinctions between these two crucial SQL components in this article.
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Jan 16, 2024 · Here, we will talk about SELECT UNIQUE which is used to fetch unique values from a column that may have duplicate values. The UNIQUE constraint is used while creating the table whereas the SELECT UNIQUE …
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Aug 9, 2023 · The major difference between the DISTINCT and UNIQUE statements is that DISTINCT works on queries and UNIQUE sets an attribute on a table column. They do not have the same functionality, but they serve the …
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Oct 27, 2014 · In SQL, the UNIQUE keyword prevents two records in a column from having the same values, while the DISTINCT keyword removes duplicate values when retrieving data. …
Difference Between UNIQUE and DISTINCT in MySQL
Nov 4, 2022 · The UNIQUE keyword makes sure that the column does not store any duplicate value. On the other hand, the DISTINCT clause is used with the SELECT statement to fetch the unique records from the table. Now let’s see …
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Jul 10, 2023 · Difference Between Unique and Distinct. In summary, while UNIQUE and DISTINCT both aim at dealing with duplicates, they do so in different contexts. UNIQUE ensures uniqueness at the data storage level …
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Feb 5, 2025 · This article covers the differences between unique and distinct keywords in SQL, along with some frequently asked questions.
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Nov 20, 2022 · What's the Difference between UNIQUE and DISTINCT in SQL? DISTINCT keyword in SQL eliminates all duplicate records from the result returned by the SQL query. …
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Jul 30, 2019 · The main difference between unique and distinct is that UNIQUE is a constraint that is used on the input of data and ensures data integrity. While DISTINCT keyword is used when …
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Jun 4, 2024 · Distinct: All different values in a dataset, regardless of how many times they appear. Each value is counted only once, even if it appears multiple times. Unique: Values that appear …
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Jan 18, 2025 · In the world of SQL, retrieving unique data from a table is a common requirement. While both SELECT UNIQUE and SELECT DISTINCT serve this purpose, they have slight …
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Jan 8, 2024 · In this article, we will explore the difference between SQL SELECT UNIQUE and SELECT DISTINCT statements. Both SELECT UNIQUE and SELECT DISTINCT are used to …
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Apr 22, 2023 · Unique means values that exist only once in the dataset, distinct means values that are repeated several times. For example you can have today's date 20/04/2023 appear …
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