select distinct

Distinct is a keyword used in SQL to retrieve unique values from a database table. It is commonly used with the SELECT statement to obtain a list of unique values from a particular column. For example, if we have a table called "employees" with columns "name" and "department", we can use the following SQL query to get a list of unique departments:

SELECT DISTINCT department
FROM employees;

This will return a list of all the unique departments in the "employees" table. If there are multiple employees in the same department, they will be counted only once.

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select DISTINCT

SELECT DISTINCT语句用于返回唯一不同的值。在表中，一个列可能会包含多个重复值，有时您也许希望仅仅列出不同（distinct）的值。使用DISTINCT关键字可以实现这一目的。例如，可以使用SELECT DISTINCT来查询表中不同的值，并返回结果集中的唯一值。根据需要，可以对一个或多个列使用DISTINCT关键字来获取不同的值。通过使用SELECT DISTINCT语句，可以过滤掉结果集中重复的数据，让查询结果更加清晰和准确。

Select distinct

" DISTINCT" is a SQL statement used to retrieve unique or distinct values from a database table. It eliminates any duplicate rows that might exist in the result set.

For example, if you have a table named "customers" with columns "id", "name", and "email", you can use the following SQL query to retrieve a list of distinct email addresses:

SELECT DISTINCT email FROM customers;

This would return a list of unique email addresses from the "customers" table.