Question

SQL 数据库ER图题目求解

1、一名研究生可以选修多门课程，一名导师可以讲授多门课，一名导师可以带多名学生，一名学生只能有一名导师。
2、一名顾客可以发出多次订购单进行订货，一张单上面可以订购多个商品，一张订购但只能属于一名顾客，一种商品可以被不同的订购单订购。
3、学生基本信息表（学号、姓名、性别、专业、出生年月等），学号为主键
选课表（学号、课程号、分数），学号、课程号为主键
课程表（课程号、课程名、所属专业、学分），课程号为主键。
（1）用ER图表示上述关系的概念模型。
（2）用表的形式表示每张表的关系模式。
（ER图可以做成图片形式作答案）

求好心人帮忙解决这几个问题，谢谢！我实在想知道这些题目怎么做的。

Answer 1

最简单的方法，装一个Visio，然后选择数据库，可以直接导出ER图，然后保存成图片放到Word里就可以啦。前提是你的外键关系要建好 当然，如果没有外键关系，也

Answer 2

yoga is not complicated. General physical exercise, tended to focus on the external beauty, but something inside little or no regard. Yoga is different, it is the external image of the sculpture,nike ltd 2, while you, give you back the power that comes from the heart. After a workout from the inside out, you will be surprised to find that the mentality has changed a look. You will not be reduced to a few kilograms of body weight and torture yourself, you will have happy and beautiful, as beautiful and happy.
we are here to introduce the yoga of the six classic action, usually at home practicing on the floor for a practice that can help you eliminate stress, keep a calm mind, make you more flexible, more balanced good, but also to maintain weight-loss secret weapon.
1, the tree position:

feet together to the mountain positions, the toe extension fully open, use your front thigh muscles to stimulate the muscles around the knee. Straighten your spine, Student Groups and shoulders. Hands together to do a prayer gesture,mbt schuhe bestellen, thumb close to the chest, elbow flexion close to the body. Then lifted his left foot, right leg tightly affixed to the inside (when necessary, use your hand to help), to maintain a balance, your right leg must maintain upright posture,Manolo Blahnik Sandals, adhere to the 5 breathing time. If you are relatively poor flexibility and softness, you can put the left foot into the leg or foot joint position, you seem like a tree, rooted in the earth, deep breathing.

2, crescent-shaped:

starting position from the tree, a big step left foot back, heel raised, legs straight and your right knee flexion, before and after the straight, arms held up,thomas sabo Ringe, hands together and press down the shoulders and back, breathing time for 5 times.
If you think that yoga is not a real exercise, then to try this action! Your thighs will tell you it's feeling.

3, warrior-like:

from the crescent-shaped, starting left foot flat, toe turn 30 degrees, legs still straight, hips turned 90 degrees. Right foot and left foot with the back to keep a line maintained at 90 degrees knee, hip, body and shoulders relaxed, centered, Stretch your arms, shoulder high, palms down. Hard stretch your fingers, as if to touch the wall. Eyes focused on the middle finger of his right hand and hold for 5 breaths of time.

4, T shape:

start from the warrior-like pose, hands on hips, upper body straight forward, lift left feet, to find a balance, and upper body completely forward, lift left leg and left leg until parallel to the body. Fully extended left leg, from hip to toe. Maintain the integrity of the buttocks, face toward the floor. Straight arms at your sides, palms toward the inside, the time for 5 breaths. If the action is too difficult for you, when you can be in the first frame in a chair leg.
5, Half Moon:

T shape from the beginning,true religion Men's Skinny, the right hand fingers touch the floor (if you can not touch the floor,Gucci Scarpe, you can pad some items such as books, etc.) shift weight to the right hand and right leg. Left foot off the floor, rotate the left shoulder, hip and left leg parallel to the ground, in order to better balance, looked up to the point of view, the time for 5 breaths. To the end, turn the torso and hips forward, reducing the mountain pose.

6, triangles:

from mountain positions, the right foot step back 2 feet, turn right into the outside of the foot and leg 90 degrees, left foot forward, the legs of a circle, the hips move forward, right foot and left foot back into a straight line. Arms raised, palms down. The leg straight (if you can not, can be flexion of the knee 90 degrees), trunk and arms stretched, breathing. The other hand on the shin bone, joint or foot on the floor, insisted his left arm and right arm in a straight line. Rise to the point of view, the time for 5 breaths. Restoration in situ, and then start the other side. Topics related articles：

Simple 4 moves acupuncture stovepipe (Photos)

manolo blahnik schuhe g??nstig Step S4 breast size get small

MBT Sport Sports Yoga weight-loss weight-loss oper

Answer 3

to wear a beautiful spring, they look at the MM weight loss exercise experts say it

With the arrival of spring and summer, many people began to lose weight and distress. In order to wear pretty thin clothes,louboutin schuhe, if you want to cut the arms, legs, waist and other local fat, how sports? Sports experts say to look at it.
current fitness cases

Vivian, F, 25-year-old physical condition: height 161cm,christian louboutin schuhe g??nstig, weight 53 kg, married without a child, there is no plan to have a baby.
Lifestyle: job stability, nine to five, one day sitting in the office of a computer, not much pressure. Three meals a day fixed, good appetite, since that with meat and vegetables properly. Weekend back to parents house to eat more. Chinese New Year eating too much meat, so a couple of pounds of fat.
most want to cut the parts: arms, buttocks and thighs.
current sports situation: You have participated in the health club, once or twice a week, running and other sports equipment-based.
prefer sports: badminton, tennis.
thin Planning

the female body within the standard, as long as the exercise progressively less fat can achieve the purpose.
thin for her to do three sports for reference:

sit Diego

body supine, legs raised, ride bicycles, do the action, stampede as a group clockwise, counterclockwise stampede as a group, each group 10, the beginning, then gradually increased, in two to three months to reach the ultimate goal of under 100 in each group. As compared to the grueling campaign,discount true religion jeans, it is proposed to cope with her breathing exercises, do not hold your breath, so that the effect of aerobic exercise will be more pronounced.
movement effect: at the same time reduce fat in the abdomen, hips and legs can slim down.
sit-ups

flexibility is better because of her waist, suggested that the basis of 30, each 5 times for a raise standards, the ultimate goal is to do 100 each.
skipping

calculated by time physical activity, neither the rhythm of jumping too fast nor too slow, to be with the breath, each maintained at 10 to 15 minutes or so can.
recommendations of the three sports once each morning and evening. Movement should be selected in the morning to get up before exercise and then wash up finish, and immediately add water. Done at night after exercise, drink some water, lie on the bed smooth normal breathing, relax the body.
■ Control Volume experts say the important three-pronged

Sports Medicine Center of Fudan University Professor Chen Shiyi that the best solution to weight control is still the joint use of exercise, nutrition and behavior change three ways. Bulletin American College of Sports Medicine pointed out that the negative energy balance, that is, weight loss diet is an important principle. Followed by the need to change bad eating behaviors and habits, exercise to aerobic exercise based, at least three times a week, every 30 minutes. People need to be reminded that beauty has not found an effective weight-loss world drugs, do not expect weight loss programs through drug shortcut.
local diet, mainly through sport and exercise physiotherapy. Such as sit-ups like the abdominal exercise to reduce waist fat, arm dumbbell exercises like aerobics to reduce arm fat, hip hip exercise to create a beautiful shape and so on, but the real effect of the local diet to reduce fat is not a local training results, but the tightening of muscle tone, restore muscle elasticity change caused by the appearance of improvement and the United States. Local training is to really achieve fat loss or fat transfer, there is no scientific conclusion. Currently, liposuction surgery is the world's beauty industry is one commonly used way to lose weight.
of any people,ed hardy schuhe, are no shortcuts to lose weight, weight control is most important is to uphold and perseverance. If you can participate in training all year round, free from temptation of delicious food, even over Lent girls can shape remains, on the contrary, if the busy staying up late,schuhe rote sohle christian louboutin, sleep late at leisure, often by eating snacks, flavors, food temptations, sometimes empty, sometimes a meal, overeating, the weight gain, increased waist circumference, the outcome is irreversible.
exercise once every 6 hours over

fat, primarily poor diet, in particular, eat health food by mistake caused. Therefore, the spring if you want to lose weight, we must increase the amount of exercise, to force movement, otherwise, by the nutritional impact of excess savings, but also fat. Ideal goal is a daily non-stop movement, every 6 hours to exercise over time, amount of exercise to feel all her muscles, part of the organization as a moderate acid Zhang Tong, Zhang Tong, mainly in the acid movement of the first week of existence, If you adhere to the exercise program, acid will gradually disappear up.
choice of exercise are jogging, sit-ups, stretching, sit Diego, Twist and so on. In addition, you can do both hands flat on the squat stand, exercise the legs and waist and hip. Elbow rotation, release the left shoulder is his left hand, right hand put the right shoulder, left elbow up and down along the front and rear direction, each time improving the standards to increase 7 or 9 times, the last of 49 times, which is useful for less arm fat. Rotating the ankle joint, according to the medial ankle,christian louboutin pumps, lateral, up, down, left, right, front and rear direction of rotation, etc., each time improving the standards to increase 7 or 9 times, the last to reach 49 times in each direction, The campaign can effectively subtract the lower extremities obesity. Overall, the choice of the number of acid up to a sense of whether the local judge, and if so, to explain physical activity in place, on this basis, can gradually increase the volume.

Answer 4

最简单的方法，装一个Visio，然后选择数据库，可以直接导出ER图，然后保存成图片放到Word里就可以啦。
前提是你的外键关系要建好

当然，如果没有外键关系，也能生成，只是各个表之间的线就没有了。不过你可以手动连接。也很简单。

画的方法可以参加以下的连接

Visio如何反向导出数据库设计文档