NAMEUSERNAME varchar (100 );
V. DML: Data ManipulationLanguage
Used to insert, delete, and modify data into a database table.
Common keywords: INSERT UPDATEDELETE
In MySQL, string and date and time types must be enclosed by single quotation marks.
Special Value: null
Exercise:
Use the insert statement to insert information about three employees into the USER table.
Mysql> insert into USER (ID, USERNAME, GENDER, BIRTHDAY, ENTRY_DATE, JOB, SALARY, RESUME) values (1, 'wangdongxue ', 'female', '201
are similar to lists, except that tuples and strings are immutable, that is, you cannot modify them.
-- The tuples are defined by commas (,) in parentheses.
-- Tuples are usually used to securely use a group of values for statements or user-defined functions. that is, the values of the used tuples are not changed.
>>> Str2 = '123'>>> Id (str2)139702043552192>>> Str2 = '123'>>> Id (str2)
139702043552576
Next, we start the operation of tuples.
First, we can look at the name generated by slicing.
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Female: Where?
Male: No.
Female: Where are you not?
Male: You should wait. (then stand up and yell at the opposite side: You are paralyzed. Why are you not hammers! You have done it! There was a grievance on the other side: I was scared and slept here: Why are you paralyzed? Why are you not missiles? Go to hell
Tags: compute mongodb sort localization by the collectorfor localized languages (for example: Chinese), MongoDB is sorted by UNICODE encoding, not by encoding in the local language. Using esproc with MongoDB makes it easy to sort the localized languages (for example: Chinese in alphabetical order). Let's take the Chinese as an example to look at the specific approach. the collection in MongoDB person saves the name and gender as follows:>db.person.find (){"_id": ObjectId ("544e4e070f03ad39eb2bf4
Label: style blog HTTP color OS ar strong SP 2014
Haha, today is a panic Sunday, tomorrow is Monday ~
Don't forget to study on weekends. Now, let's review discrete mathematics ~
By the way, I have a thorough understanding of the girl's skills. It's not a dream for the girl friend of programmers!
The discrete mathematics class (csci2110) has an interesting question.
Suppose there are five boys and five girls, each of whom has a certain preference order for the five opposite sexes in their
The IT session will be crowded at the job fair. Wu finally squeezed into a booth and quickly browsed the recruitment information. He was glad that he met the conditions of the software developers and suddenly saw the last line of the requirement information saying "Gender, male ", I felt very frustrated. In this way, I turned around a few times and did not see the recruitment of female developers. It was hard to find a company to recruit female progra
USER values (2, 'hangzhou', 'male', '2017-09-08 ', '2017-02-17', 'cto', 1990, 'Strong man ');
Mysql> insert into USER values (3, 'Display as ', 'male', '2017-09-08', '2017-02-17 ', 'UFOs', 1988, 'shuai Pu ');
View all records in the table
Mysql> select * from USER;
View all the codes of the database:
Mysql> show variables like 'character _ set % ';
Character_set_client: character set used by the client
one element in the tuple, the element is followed by a comma (,)Name = (' Xiaofang ',)He has only 2 methods, count and index usage are the same as the list above.6. Dictionary (Dictionary)A dictionary is the only type of mapping in Python that stores data in the form of key-value pairs (key-value). Python computes the hash function of key and determines the storage address of value based on the computed result, so the dictionary is stored out of order and the key must be hashed. A hash indicate
Original works of Lin Bingwen Evankaka. For more information, see http: blogcsdnnetevankaka. Data Query refers to obtaining the required data from the database. Data query is the most common and important operation in database operations. You can use different query methods based on your data requirements. You can obtain different data through different query methods. MySQL uses the SELECT statement to query data. The content in this chapter includes.
1. basic syntax of the query statement2. qu
the scene in line with, while the old street or old alley for shooting scene, you can choose cheongsam, long skirts and other slightly more elegant clothes, and retro scene fusion.
As for equipment, I am accustomed to using the fuselage of Canon EOS5DS and the EF 50mm f/1.4 USM. The Canon EOS 5DS has a superb quality of half billion pixels and leaves more room and possibility for image clipping. and the focal lens of the large apertu
How to upload photos with old net tutorial
First, open http://how-old.net/ This site click Use your own photo upload pictures
Second, upload a photo of yourself or someone else to the site, a few seconds later, the system will be analyzed, interpretation of the age of the image, even gender can be judged. You directly click the button to upload it.
How can HowOldRobot not use
If many of the mainland users are not used words are mostly because it is outside the net, there is no shieldi
is "website construction."
The "Interactive" Department of the advertising agency
In this "circle" of advertising, more and more 4A advertising companies set up an "interactive" department; The reason is very simple, the market needs; it is not opposed to the traditional advertising practitioners to understand the construction of fencing sites, however, they often too take creative and visual when the matter; the idea is Grandpa, vision is grandma, strategy is dad, Brand is mom, Website on TM
constructor overloading.
2. The constructor method name is the __construct () that starts with a two bottom line.Here is an example of it:
Class Person{Public $name;Public $age;Public $sex;/*** Display declares a construction method with parameters*/Public function __construct ($name = "", $sex = "Male", $age =22){$this->name = $name;$this->sex = $sex;$this->age = $age;}/*** Say method*/Public function Say (){echo "My name is:". $this->name. ", Sex
JSON (JavaScript Object notation) is a lightweight data interchange format, which is a JavaScript representation of objects. It is very convenient for programmers to deal with the data, but also convenient for the machine to the data analysis and generation, the application is very extensive.
JSON is a lightweight data interchange format in which a JSON-formatted file can grow like this:
{
' name ': ' Hanzichi ',
' sex ': ' Male '
}
It a
Student table: T_studentNumber s_id shaping primary key auto-incrementName: S_name string does not allow duplicatesGender: S_sex String Default value maleAge: S_age PlasticClass: S_class stringBuild tables and add data with no less than 10 data, and complete the following topics1. Change the name of Liu Ji to Liu Bowen2. Tong Pak-fu age 20, sex male, Class is T130, add to Table3. Find out all the information about all the people whose names include Bo
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