visioning exercise

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Orcle database Query Exercise review: Four

fromCoursewhereCNameinch('Mathematics','English') Step2SelectCid fromStudentwhereSsex='male'Step3SelectSid fromMarkwhereSidinch(STEP2) andCidinch(STEP1)Group bySid7. Find out the names of students who are evenly divided by more than the total sharing (sharing of all courses for all)Select avg from Selectfromgroupby hasavg(cmark)> (STEP1)8. Which course in Shanghai is evenly divided than FujianStep1SelectSid fromStudentwhereSnativeplace='Shanghai'Step2SelectCidavg(Cmark) fromMarkwhereSidin=(S

MySQL Review little Exercise

of the school number, name;Select S.id from student s where s.id not in (select S.id from student S, Teacher T, Course C, SC where sc.s_id=s.id an D sc.c_id=c.id and C.t_id=t.id and C.id =1)6. The inquiry has studied "001" and has also learned the number and name of the students in the "002" course;Select Aa.id,aa.sname from (select S.id,s.sname from student S, Teacher T, Course C, SC where Sc.s_id=s.id and Sc.c_id=c. ID and C.t_id=t.id and c.id =1) AA, (select S.id,s.sname from student S, Teac

SQL text Exercise

department number and descending by salary:SELECTEmpno,deptno,sal,ename,job fromEmpORDER by 2 ASC,3 DESC; Replace letter stringSELECTTRANSLATE ('AB Hello BCADEFG','ABCDEFG','1234567') asNew_str fromDUAL; Sort alphabetically by letter and number in a mixed column data:6767adams→ename:adamsSELECTData,translate (data,'-0123456789','-') asEname fromVORDER by 2: First, the column of letters, that is, to take out the sort of the basis of another column ename, and then in the sort, the numbers an

Database Exercise 3

Label:11. Check the average score of each course.12. Check the average score of the course with at least 5 students enrolled in the score table and begin with 3.14. Sname, CNO and degree columns for all students are queried.15. Check the SNO, CNAME and degree columns of all students.16. Check the sname, CNAME and degree columns of all students.17. Check the average score of "95033" class students.19, the query elective "3-105" course performance is higher than the "109" student scores of all the

Shell exercise (Key-free login script)

#!/bin/bashremote_ip=$1if[!-N" $"] ; Then Echo "Please usage./without_password remote_host!"Exit1Else Echo "The remote_host you input is $remote _ip"fiSSH[Email protected] $remote _IP"mkdir. ssh; chmod. SSH"Ssh-keygen-t RSASCP~/.SSH/id_rsa.pub [email protected]10.0.0.223:/root/.SSH/Authorized_keysSSH[Email protected]$1 "chmod ~/.ssh/authorized_keys"SSH[Email protected]$1ifconfigExit remote[[Email protected] ~]# exitlogoutconnection to10.0.0.223closed.eth0 Link encap:ethernet HWaddrxx: 0C:

Shell Practice Applet Exercise--99 multiplication table

Recently, I was going to review the shell, just to see the shell operation, and to write a simple 99 multiplication table like a beginner. It is suggested that you can run shell scripts directly in Http://www.runoob.com/try/runcode.php?filename=helloworldtype=bash if you do not want to install Linux environments.First, the previous code#!/bin/bash#使用while循环I=1;While [$i-le 9];d o #-le means less than or equal toJ=1;While [$j-le $i];d oEcho-n ${j} "x" $[i] "=" ' Expr $i \* $j ' ""; #echo-n means

Shell Scripting Exercise A

ifMulti-branch statement practice#!/bin/bashread-p " Please enter 100 m running seconds: "IIf [$i-lt] [$i-GT 0]Thenecho " Enter the final "read-p " enter male and female "aif [$a = male]Thenecho " into the men's group "elif [$a = female]Thenecho " Enter the women's group "Elseecho "Error"Fielif [$i-ge 10]; Thenecho " elimination "Elseecho " Error "Fi Case Statement Practice, automatically unzip the compressed file according to the filename suffixVim untar.sh#!/bin/bashCase $ in*.gz)If [-F $]Th

Shell programming Exercise-Copy the specified file (keep the directory structure of the file)

/bakdir/root/dir1/dir3/file3-rw-r--r--1 root root 23M Feb 12 12:1 9/tmp/bakdir/root/dir1/file1-1-rwxr-xr-x 1 root root 3.7M Feb 12:19/tmp/bakdir/root/nginx-1.12.2/objs/ nginx-rw-r--r--1 root root 2.0M Feb 12:19/tmp/bakdir/root/pcre-8.40.tar.gz-rw-r--r--1 root root 1.2M Feb 12:19/t Mp/bakdir/root/pi. DAT 4.3 Concrete implementations[[emailprotected] ~]# cat CpFiles.sh #!/bin/bash#Func:cp files include directory#Author:reed. /etc/profileSourcePath="/root"DestPath="/tmp/BakDir"#mkdir backup direct

[Zhan lixing matrix theory exercise reference] Contents

Note: 1. Some of them are self-developed, while some are post-referenced. 2. If you have any good ideas and answers, please kindly inform me or reply to them on the corresponding Exercise answers page. I hope you can point out any errors. 3. After all, I have studied advanced algebra in college and want to learn more about matrix theory (matrix = magic). I will select this book first. Chapter 1 prerequisites [Zhan Xiang matrix theory

Algorithmic Competition Introductory Classic (Rujia) the answer to the first three chapters of a post-lesson exercise

Reproduced in this article:Chapter I.Exercise 1-1#include int main (){int a,b,c;Double D;scanf ("%d%d%d", a,b,c);D= (Double) (A+B+C);printf ("%.3lf\n", d/3.0);return 0;}Exercise 1-2#include int main (){int F;Double C;scanf ("%d", f);c=5* (F-32)/9;printf ("%.3lf\n", c);return 0;}Exercise 1-3#include int main (){int n;scanf ("%d", n);printf ("%d\n", (n (1+n))/2);return 0;}

Steps and methods of exercise

Steps and methods of exercise (1) skillful routines and clear posture The so-called "routine" refers to the entire architecture of Taijiquan. The so-called "posture" refers to the action structure of each type. At the beginning of the school, the primary focus is on the routine proficiency, and the orientation is correct. Pay attention to the posture specification. After a period of practice, the routine has been skilled. At this time, you must focus

[C language exploration tour] Part 1 Lesson 10: Exercise questions + exercises, study tours

[C language exploration tour] Part 1 Lesson 10: Exercise questions + exercises, study tours Introduction 1. Course outline 2. Part 1 Lesson 10: exercise + exercise 3. Part 2 Lesson 1: Modular programming Course outline Our courses are divided into four parts. Each part has exercise questions after completion and an

C language programming exercise reference answers

C language QQ group: 108168489 This group is a common group with a maximum of 100 people. It cannot accommodate all C language students. Please forgive me. Apply to joinBe sure to enter the "class and name](Not SpecifiedClass and name, Refuse to join), And then modify the group business card. After the course ends, [cancel the Group] (you will leave the group ). [1] C LanguageProgramDesign course calendar 2010 Spring http://www.cnblogs.com/emanlee/archive/2010/04/11/1709439.html[2] C la

A good way to stay away from lumbago-how do you exercise your back muscles?

In our orthopedic outpatient department most common is the lumbago patient, causes the low back pain The reason many, also is more complex, therefore has the proverb "The patient lumbago, the doctor headache" one said. In fact, a large part of the symptoms of low back pain are related to muscle fascia strain or aseptic inflammation in the rear of the waist, do not need surgery, take conservative treatment can be. And one of the important things is to exercis

[C language exploration tour] Part 2 Lesson 10: Exercise questions and exercises, study tours

[C language exploration tour] Part 2 Lesson 10: Exercise questions and exercises, study tours Introduction 1. Course outline 2. Part 2 Lesson 11th: Exercise questions and exercises 3. Part 3 Lesson 1 notice: Install SDL Course outline Our courses are divided into four parts. Each part has exercise questions after completion and answers will be published. Th

Programmers need to exercise their own exercises on the suggestions of three netizens: +++ bluechart

User A said: Working in front of the computer for a long time is very unhealthy. fitness can exercise your will, improve work efficiency, and enhance your strength. Fitness Programmers generally lack exercise and do not often consume much physical energy. Therefore, even if you eat very little, the fat will accumulate in your abdomen and buttocks unceremoniously. In addition, the body often lacks a long ti

Exercise-Healthy Life

Exercise can consume calories, promote metabolism, improve diet rules, beauty, detoxification, fitness, cure, improve mood, and help improve a series of sub-health. Daily exercise can improve your anxiety and ease your mood. It can also promote blood circulation, strengthen cell metabolism, and achieve a healthy effect! Sports can cure all diseases and prevent diseases ............ Benefits of sports:

How do you exercise at the waist?

much as possible, and then put down slowly. After this exercise is performed evenly, the knees bend and continue to perform the same action. Repeat eight times. 4. sit-and-bend: mainly refers to the development of upper and lower abdominal muscles. Straighten your knees, move up your upper body, maintain balance, and bend your knees to lower your abdomen to make your abdominal muscles bend. In practice, the foot is always inaccessible to the ground.

C + + Primer Fifth Edition exercise answer chapter II

Exercise 2.1Q: What is the difference between type int, long, long long and short, and what is the difference between unsigned and signed types? What is the difference between a float and a double?A:int, long, long long and short sizes differ in the range of data represented. Unsigned can only represent 0 and positive numbers, and unsigned can also represent negative numbers. Float is a single-precision floating-point number, double doubles, in genera

How can I exercise my muscles so that they can grow rapidly without rebounding? What simple equipment is needed?

There is no excuse. We don't want to hear you don't have time to exercise. Or it is inconvenient for you to regularly go to the gym. Or you think it is more advantageous to spend membership dues somewhere else. If you think so, well, we have a work und here to solve all the above excuses.First, you can exercise without leaving the house. With membership dues, you can buy basic equipment that creates a bette

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