In SQL, DESC and ASC keywords are used to sort the query results in descending and ascending order, respectively, and the descending order is arranged from large to small, and ascending order is arranged from small to large.
Descending and ascending order in SQL
In SQL, descending and ascending order are used to sort query results.
descending order
Descending order means sorting data in order from large to small. It uses the DESC keyword. For example:
<code class="sql">SELECT * FROM customers ORDER BY name DESC;</code>
The above query will arrange the customer table in descending order of customer names.
Ascending order
Ascending order means sorting data in order from small to large. It uses the ASC keyword. For example:
<code class="sql">SELECT * FROM customers ORDER BY name ASC;</code>
The above query will arrange the customer table in ascending order of customer names.
the difference
The main difference between descending and ascending order lies in the order in which the data are arranged. The descending order is arranged in order from large to small, while the ascending order is arranged in order from small to large.
application
Descending and ascending order can be used in various situations, such as:
- Find the highest or lowest value
- Arrange data by specific column group
- Create reports and charts
- Perform data analysis
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