Subquery (Chapter Summary), subquery Chapter Summary

Source: Internet
Author: User

Subquery (Chapter Summary), subquery Chapter Summary
1. Self-query refers to multiple small queries embedded in a complete query. According to different requirements, self-query can appear in any position of the query statement, but in FROM, WHERE and HAVING clauses are followed by many cases.


2. The results returned by the self-query are divided into four types: single-row Single-Column subquery, single-row multi-column subquery, multi-row Single-Column subquery, and multi-row multi-column subquery.


3. If the subquery returns multiple rows of Single-Column data, you can use IN, ANY, and ALL for determination.


4. subqueries, restricted queries, multi-table queries, and statistical queries can be combined to complete complex query operations.


5. analytics functions facilitate data partitioning, sorting, and window separation, allowing you to perform statistical operations on data.


6. In addition to complex SQL statements, you can also use the functions of aggregate () and unaggregate.


7. Hierarchical operation statements can be used to display the hierarchical structure of specified data.
Summary of each chapter in a novel

There is a fixed form for this!
There is no fixed mode for Chapter content.
Why is there a content feed?
If you have to, use a scenario as a chapter.
The mode is three steps:
Scenario Description (time, location, and plot undertaking description)
Scenario events (including language, action, behavior, and mind)
Conclusion (comments and questions can be written ...... Or do not write)
The same is true for the content feed.
Honestly, this is boring ......

Summary and reading experiences of each article

1. "dog, cat, and mouse"-in this article, Mr. Lu Xun cleared the crimes of cats. First, cats always have enough to play with their prey to eat them; second, it is cool with the lions and tigers, but it is naturally charming. Third, it is annoying when it is used together. Fourth, it eats a little hidden rat that I loved when I was a child. Although it was later confirmed that it was not the harm of a cat, I would not like it, not to mention that it did eat a rabbit later! This article uses the "cat" type to sharply and visually Satirize people similar to cats in life.

2. A long and a sea Sutra-a long was a nanny of Lu Xun when he was a child. Describe the situation of getting along with Agoda in childhood, and describe the kindness, simplicity, superstition, nagging of long mothers, and the character of "full stomach is troublesome etiquette; she is full of respect and gratitude for her long-cherished plot of the mountain sea Sutra. The article expresses the sincere nostalgia for the working woman in a deep language.

3. Twenty-four filial piety figures-the so-called twenty-four filial piety figures are a book about twenty-four filial piety stories in ancient China. They are equipped with pictures to promote feudal filial piety. Starting with his experience in reading the "24 filial piety map", Mr. Lu emphasized the strong dislike caused by reading the stories of "Laolai entertainment" and "guo juweier, vividly reveals the hypocrisy and cruelty of feudal filial piety.

4. The five-day gala-the five-day gala is a welcoming event. In my childhood, it was a holiday in my mind. Describe the eager and excited mood of the child who hoped to watch the welcoming event, and the painful feeling of being forced by his father to recite "jian omitted. It points out the suppression and destruction of Children's nature by forced feudal education.

5. impermanence: impermanence is a humane ghost. When I go to the soul, I see my mother crying and dying son so sad that I decided to let her son "return to the sun for half a moment ", as a result, he was beaten by Luo Wang, the top boss. When recalling impermanence, the article occasionally adds a few irony to the reality that is called a gentleman. The impermanence gives Lu Xun a little comfort to his lonely and miserable heart.

6. From the garden to the three-flavor bookstore-describes the fun and boring life of reading in the Three-flavor bookstore at home in childhood, reveal the sharp contradiction between children's broad life interests and the education of feudal bookcases that constrain children's nature, and express the reasonable requirements for healthy and lively growth of children.

7. Father's illness: the death of his father by a mediocre doctor has always been a pain in Lu Xun's heart. The article focuses on recalling the cases where my father was treated as a medical doctor and describes the practices, style, and practices of several famous doctors, reveals the essence of these doctors, such as being confused, being confused, blacklisting money, and killing lives.

8. In this article, Lu Xun mainly recalled his departure from Shaoxing to go to Nanjing for study. The work described the drawbacks of the Jiangnan Water Division School and the mining railway school at that time and the difficulties of knowledge, and criticized the Foreign Affairs school's "smoke and smoke ". The author describes the excitement of being in touch with evolution and the hunger and thirst for reading the story of Tianyan, which shows a strong desire to explore truth.

9. Mr. Teng Ye-records the study and life of the author during his studies in Japan and describes the process of being discriminated against, insulted, and deciding to abandon a doctor in the Sendai Medical College. The author highlights Mr. tenano's rigorous, honest, enthusiastic, and non-national prejudice character, and expresses his deep affection for Mr. tenano.

10. Fan ainong: traces several pieces of life that the author has been in contact with fan ainong after studying abroad and returning home, describing fan ainong's dissatisfaction with the Dark society and the pursuit of revolution before the revolution, after the revolution, Xin Hai suffered a great deal of persecution, expressing disappointment with the old democratic revolution and sympathy and mourning for the upright and stubborn patriot.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.