enjoins

enjoins的音标为[ɪnˈdʒɔːnz]，基本翻译为“命令；劝告；邀请；使过得去；使过得去于；使过得去于…之上”。

速记技巧：可以将enjoins拆分为en-joins，其中en表示“使…”的意思，joins表示“连接”的意思，整体可以理解为“使连接”或“命令连接”。

使用速记技巧可以帮助我们快速记忆和识别该单词，同时也可以帮助我们更好地理解和应用该单词的含义。

Enjoins这个词的词源可以追溯到拉丁语“adjoindere”，意为“连接，结合”。它的变化形式包括其过去式“enjoined”和过去分词“enjoined”。

相关单词：

1. "Join"：这个词与enjoins有着相似的词源，意为“连接，结合”。它也有着丰富的变化形式，如现在分词“joining”，过去式“joined”和过去分词“joined”。

2. "Injunction"：这个词是由enjoins和join这两个词衍生出来的，意为“命令，指令”。它也有着丰富的变化形式，如现在分词“injoining”，过去式“injured”和过去分词“injured”。

3. "Joiner"：这个词表示一个专门从事连接工作的人，比如木匠或电工。

4. "Joining"：这个词表示连接两个或多个物体或概念的过程。

5. "Joiningly"：这个词用来形容某种行为或状态是连接的或结合的。

6. "Injury"：这个词表示身体或精神上的伤害，与injunction有着相似的词源。

7. "Injure"：这个词与injury有着相似的意思，表示伤害或损害某物。

8. "Joinder"：这个词在法律上用于表示对某事的参与或加入。

9. "Joinery"：这个词表示木工或家具制作的艺术或技术。

10. "Jointly"：这个词用来形容两个或多个事物同时进行或一起做某事。

以上这些单词都与enjoins有着密切的联系，并且都与连接、结合和合作等概念有关。

常用短语：

1. inner join：内连接，用于检索两个表中存在匹配值的记录。

例句：The employees table is inner joined to the departments table to find employees who work in a particular department.

2. left join：左连接，返回左表（在外表）中所有记录以及右表中匹配的记录。

例句：The customers table is left joined to the orders table to retrieve all customers regardless of whether they have any orders.

3. right join：右连接，返回右表（在外表）中所有记录以及左表中匹配的记录。

例句：The products table is right joined to the categories table to retrieve products that belong to a particular category.

4. cross join：笛卡尔积连接，返回两个表中所有记录的组合。

例句：A cross join is performed on the students and courses tables to retrieve all combinations of students and courses.

5. where clause：条件子句，用于筛选记录。

例句：The results are limited to those records where the price is less than $10.

6. order by：按指定字段排序结果集。

例句：The results are sorted by the date of the orders in ascending order.

7. group by：根据指定字段对结果集进行分组。

例句：The results are grouped by the product category and the total sales are calculated for each category.

英文小作文：

Title: Joins in Database Management

Joins are an essential part of database management, allowing us to combine data from multiple tables and retrieve information in a more meaningful way. There are several types of joins, each with its own unique use case.

Inner joins are used to retrieve records from two tables where there is a match between the columns. It helps us identify relationships between tables and find commonalities among them.

Left joins are used when we want to retrieve all records from the left table, along with any matching records from the right table. This is helpful when we are interested in左侧数据 and need to see how they are related to右侧 data.

Right joins, on the other hand, are used when we are interested in右侧 data only and need to see how they are related to左侧 data. It helps us understand the relationships between tables from a different perspective.

Cross joins produce a cartesian product, which means that every combination of records from both tables is retrieved, resulting in a larger result set. It can be useful when we need to identify all possible combinations of data from multiple tables.

Where clauses allow us to add conditions to the join, limiting the result set to only those records that meet certain criteria. Order by allows us to sort the result set based on a specified column, making it easier to analyze and interpret the data.

Group by helps us organize the result set into groups based on a specified column and calculate aggregate values such as total, average, and count for each group. Joins are a powerful tool that enables us to gain deeper insights into our data.