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delete和delete from的区别

2023-07-14 13:27:18
共1条回复
tt白

在SQL Server中两者没有区别,但在Oracle的SQL语句中,delete * from是不标准的语法,执行无法通过。 Oracle下执行delete from语句(成功): Oracle下执行delete * from语句(失败):

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SQL中,delete与deletefrom有区别吗(sqldeletefrom)

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SQL中delete * from 和 delete from 有什么区别?

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For example,with the developmet of cities, the using of insecticide and serious pollution, their living areas have bee narrowcr and narrower. Many of the wild animals, now are confronted with food crisis. At the same time, man is killing off species just for getting their fur, skin, horns, teeth and meat. Saving Land for Endangered Animals There is only so much land on the earth, and so what we can do with it is limited. Some people believe that human needs for farmland, housing and industry should e first, while others believe that some land should be set aside for endangered animals. I am of the opinion that we should reserve some land for the world"s animals for the following reasons. First, mankind"s need for land is constantly growing. If the demand is not checked in some way, humans will eventually develop all of the earth"s available land. At that time, mankind will have no more room to grow, and all the wild animals will have disappeared, as well as other valuable resources. Second, humans are able to innovate and can use the land that they already possess in more efficient ways. Animals are unable to do this. Once their land is taken away from them they will die. Third and last, endangered animals are an important part of the biodiversity of our pla. If they disappear, we cannot predict what the effect will be. Therefore, we should treat such animals as a valuable resource to be protected. To sum up, the world"s endangered animals are an important resource and we should protect them by setting aside some land for them. Although mankind"s need for land continues to grow, people are intelligent and inventive enough to put the land they have to better use. In this way, we can have enough land for farming, housing and industry, and preserve the biodiversity of the pla at the same time. 参考译文: 保留土地给濒临绝种的动物 地球上的土地就只有这么多,所以我们可以利用土地的方式有限。 有些人认为人类对于耕地、居住以及工业的需求应该摆在第一位,但是有人则认为,有些土地应该留给濒临绝种的动物。我的看法是,基于下列的理由,我们应该保留一些土地给地球上的动物。 首先,人类对土地的需求在不断增加。如果这些需求不以某种方式来加以抑制,人类最后将会开发完地球上所有可用的土地。 到那时候,人类将没有栽种作物的空间,而且全部的野生动物将会和其他宝贵的资源一样消失殆尽。其次,人类可以创新并且以更有效率的方式来使用已经拥有的土地,动物则无法做到这一点。 一旦土地被剥夺,它们就会死亡。第三点,也是最后一点,濒临绝种的动物是我们地球上物种多元性的重要组成部分。 如果它们消失了,我们无法预测将会造成什么样有影响。因此,我们应该把这些动物视为需要保护的珍贵资源。 5. 求一篇“去动物园”的英文作文 I go to the Xiangjiang Zoo in Panyu.with my family. The zoo is very big and very beautiful , the zoo has a lot of animals , panda,lion,tiger,snake,elephant,fox… Collected By Panda is very cute and very fat , but it is not my favourite animal. Lion is very strong , but it isn"t my favourite animal either, because it isn"t very handsome. Tiger is very strong and very handsome , it"s my favourite animal, because it"s very strong and very handsome. I feel very happy ! 6. 关于动物园的英语作文 Today I visited the zoo with several clas *** ates. We went on foot. It was half an hour"s walk. When we got there, the zoo was already full of people. There are many animals in the zoo. They were very interesting, but we were especially interested in monkeys. They made all kinds of faces and we also talked with some foreign guests in English. It was time for lunch when we got home. I really had a wonderful time today. 今天,我和几个同学参观了动物园。我们步行。这是一个半小时的步行。当我们到了那里,动物园已经挤满了人。有许多动物在动物园中展览。他们是非常有趣的,但我们尤其感兴趣的猴子。他们提出的各种面孔,我们也谈到了一些外国客人的英文。现在是午餐时间,当我们回到家里,是多么美好的一天啊! 7. 动物园英语作文怎么写 sunday jane with her mother to go to zoo.in the zoo,they look mang animal.she and her mother look at elephants,pas,lions and tigers.some animals are very nice,some animals are very ugly,same animals are firendly.jane have a good time,bcease sheis very like those animals.。 8. 关于在动物园管理员的英语作文 We should take care of the animals in the zoo. First, I personally think we shouldn"t feed animals casually because those animals may eat something bad for their health. People like to municate with animals face to face. However ,that might hurt the animals as well as themselves. Besides, we shall not toss the trash everywhere. It is important for the environment of the zoo. 我临时随便写的,希望能帮助你
2023-07-14 04:08:001

七年级英语作文

  在我们平凡的日常里,大家对作文都不陌生吧,借助作文人们可以反映客观事物、表达思想感情、传递知识信息。如何写一篇有思想、有文采的作文呢?以下是我为大家整理的七年级英语作文7篇,欢迎大家分享。 七年级英语作文 篇1   Wow, you even the table! My family finally moved into a new building, at the same time, I also have my own small room, was quite happy! My room as a whole are light pink, wall is pink, the ceiling is pink. Mother said that the color is warm in winter and cool in summer, and looks very bright. By the way, on the high ceilings, a lovely rabbit light hanging, whenever I came into the room it will enthusiastically and looked at me, if is a stranger, thought is a flying yutu! And a pregnant mother rabbit, because it is stomach is so big! My bed! In my the left side of the room, with pink bed sheets, bedspreads, and pink bed is pink pillow, and the color of the room is the same! That kind of feeling, warm, very quietly elegant, very fresh, very comfortable! My study desk is in the left front of the small bed, on the table is really colorful! A small bookcase with a three layers, a layer on the bottom of the smaller, lay my strawberry shape small cups, very beautiful, a look like a really strawberry, but it is orange. , the middle layer is below a layer of a little larger, there is one of my favorite above all sorts of fairy tale books. The third layer to put my cute little doll, they put all kinds of lovely modelling, it is a doll"s house. Beside the bookshelf is my small desk lamp, it is a folding burger,, as long as I see desk lamp, just want to laugh. On one occasion, the younger brother to my home to produce, the desk lamp of he saw me, go up and then bite, have nearly gave his teeth. Don"t blame her little brother, take it seriously, every time I write my homework, the saliva can not but flow. ? My room is lovely! Have time I will show you around!   哇,好戏连台呀!我家终于搬进了新楼房,同时呢,我也就有了属于我自己的小房间,真是太开心啦! 我的房间整体都是淡淡的粉色,墙壁是粉色的,天花板也是粉色的。妈妈说这个颜色冬暖夏凉,而且看上去还很明亮。对了,在高高的天花板上,吊着一盏可爱的兔子灯,每当我进房间时它都会热情地看着我,如果是外人来了,还以为是一只飞天玉兔呢!并且还是一只怀孕的母兔,因为它的肚子好大呀! 我的床呢!位于我房间的左侧,床上铺着粉色的床单,床罩,还有粉色的床被,粉色的枕头,和房间的颜色是一致的哟!那种感觉,暖暖的,很淡雅,很清新,还很舒服呢! 我的学习桌就在小床的左前方,桌子上面真是丰富多彩啊!有一个三层的小书架,最下面的一层比较小,放着我的草莓形状小水杯,很漂亮的,一看就像一个真的草莓,不过它是橙色的。,中间的一层比较下面的一层要大那么一点点,上面放着我最喜欢的各种童话书。第三层放了我可爱的小玩偶,他们摆出各种可爱的造型,简直就是一个玩偶之家。 书架的.旁边是我的小台灯,那是一个折叠的汉堡,惟妙惟肖,我只要看见台灯,就想哈哈大笑。有,小弟到我家来串门儿,他见了我的台灯,上去就咬了一口,差点把他的牙硌掉。不怪小弟把它当真的,每次我写作业的时候,口水就忍不住流下来。 怎么样?我的房间可爱吧!有时间我就带你参观一下喽! 七年级英语作文 篇2   Taking care of our environment is our duty.But how we can do to make our environment more beautiful? At first,we must make ourselves clean.For example,we must wash our clothes when they are dirty.We should not litter waste things about,and draw on the wall.We mustn't spit in public or cut down trees. We should plant more trees around our nEighbourhood.We should pick the rubbish up and throw them into the dustbin when we see them. We must make our world more and more beautiful,don't you think so? 七年级英语作文 篇3   有一天,我进入了的大脑里,发现许多奇形怪状的细胞,他们是什么呢……   当我穿梭到英语老师的大脑中,发现了许多奇形怪状的细胞。    细胞一:“敬业”细胞   我们的英语老师大名敬文,真是人如其名,她可是相当相当敬业。在她的大脑里,有这样一种细胞——形状像一颗心(也许就是敬业心吧!),其数量数不胜数,大概占所有细胞的二分之一。一到期末复习时期,他们就开始飞速地分裂,然后肆意地操控着英语老师到处借,见们叫苦不迭,严重的似乎还想来个“学生起义”呢!他们又操控着英语老师的“说话神经”说了一些极有说服力的话:你们想不想过好你们的寒假啊,现在的付出就可以换来充满的寒假,何乐而不为呢?见同学们心服口服,他们才继续工作着,英语老师就开始勤劳地工作……    细胞二:“罗嗦”细胞   “罗嗦”细胞的形状像一张张嘴巴,故又名“烦人”细胞。话说昨天,我们班小强的期末复习考卷漏做了一面,“罗嗦”细胞便开始工作啦,只听见英语老师喋喋不休“考卷多重要,你怎么能不做?”“考试考不好,你想在吃年夜饭时被你爸你妈叨唠是吧?”差点小强被唾沫淹死。本以为这件事情就这样过去了,没想到下午来上学的时候,小强、他的还有英语老师在里,只见小强和他妈妈像做了大错事一样,都耷拉着脑袋,听着英语老师的“谆谆教导”。小强回来时,趴在课桌上——“我快死了,英语老师的话太有杀伤力啦~~”哎,可怜的小强……    细胞三:“发怒”细胞   “发怒”细胞长得像一团火焰,故又名“怒火”细胞。看着这一团“熊熊燃烧的火焰”,我不禁打了个寒战——在班上,英语老师算是比较疼爱我和英语课代表了,那一次,我和英语科代表的成绩都大幅度下降了,也许是“发怒”细胞紧急集合,英语老师的脸通红,声音高了N分贝:“你说你们,怎么这么粗心?这么简单的试卷,考得一塌糊涂?你们可是班上同学的榜样啊!!”说得我恨不得挖了地洞钻进去,然后有些“发怒”细胞躲了起来,英语老师的怒火息了一点,心平气和地但略带不满地说:“期末好好考,不能再考砸了啊!”我们都在不停地发抖,寒……   尽管英语老师有他们这样有些烦人但有些令人发抖的细胞,但是,她依然是我们最最亲爱的MissFu…… 七年级英语作文 篇4   Park   There is a park near my home.There are a lot of beautiful trees,flowers and birds in the park.So many people go to the park to enjoy their weekends.They like walking or having a picnic in the park.But I like flying a kite with my sisiter there. 我家附近有一个公园。哪里有很多美丽的树、花和小鸟。所以很多人都喜欢到那里去度周末。他们喜欢在公园里散步或是野餐.但是我喜欢和我姐姐在那里放风筝。   Bedroom   I have a small bedroom.There are only a small bed,a small desk and a small chair in the room.And there is a beautiful doll on my blue bed.Everyday I do my homework,read books and play games with the doll in my bedroom.It is small,but it gives me much happiness. 我有一间小小的卧室。那里有一张小小的床、小小桌子和一把小小的椅子。而且还有一个漂亮的娃娃在我那张蓝色的小床上。我每天都在房间里写作业,看书和与我的娃娃玩。虽然房间很小,但是他给了我很多欢乐。   My father   My father is a tall and handsome man.He is a policeman. Everyday he comes back home very late,because he must help the others.He doesn"t have time to examine my homework and take me to the park.But I like my father,because he is a good policeman. 我的爸爸是一个高大帅气的男人。他是一个警察。他每天都很晚才回家,因为他要帮助其他的人。他没有时间给我检查作业和带我去公园。但是我仍然很喜欢我的爸爸,因为他是一个好警察。   I am from ShenZhen. In spring ,the weather is warm and wet. I can play kite. In summer, the weather is hot and wet. I can swim in the swimming pool. In the autumn, the weather is cool and dry. I can play kite, too. In the winter, the weather is cold and dry. It never snow.   我是来自深圳。在春天,在天气温暖及潮湿。我可以玩风筝。在夏季,天气炎热及潮湿。我可以游泳,在游泳池。在秋天,天气凉爽,干燥。我可以玩风筝,太。在冬季,天气寒冷及干燥。它从来没有积雪。   Today is my grandpa"s birthday. Our family went back to my grandpa"s home in the morning. We got together to have a big family dinner to celebrate his birthady. We bought a big birthday cake and gave some presents to my grandpa.   In the afternoon, we went to the park to go boating. We had a good time. My grandpa had a nice time on his birthday.   今天是爷爷的生日,我们全家早晨回到爷爷家。我们举行了大型家庭聚会来庆祝爷爷的生日。我们买了一个大生日蛋糕,并且送给爷爷一些礼物。   下午我们去公园划船。我们玩得很开心,爷爷过了一个愉快的生日   Mr.Knott is a teacher. He is at home. The telephone rings. Heanswers the phone.He says,“Hello.This is 82654379. Who"s that”“Watt” a man answers.“watt"s your name,please”says Mr.Knott is angry.“Watt"s my name!”the other man is angey,too. knott先生是一名教师。他是在家中。电话响了。他回答接起电话,说,“ 你好,这是82654379 。你是谁? ”“瓦特”一个男人答道 。“请问你的名字是什么? ”knott先生生气地说。“瓦特就是我的名字!”另一名男子是也生气了。   A farmer has five sons.They are Ted,Bob,Tom,John and Bill. John has no elder brother. He was four years older when his first younger brother was born. The number of Toms elder brothers is equal to his younger brothers. Bill will be twenty-one years old next year, and he is five years older than Bob. Bob is two years younger than Tom. Ted was sad because he has no younger brother. There are twelve years between him and John. 一个农民有5个儿子。他们是Ted,Bob,Tom,John 和 Bill。John没有比他大的哥哥,他比第一个出生的比他小的那个弟弟大4岁,Tom哥哥的数量和他的弟弟的数量是一样的(就是他是老三)Bill 明年就21岁了,他比Bob大5岁,比Tom小2岁,Ted因为没有弟弟而难过 Ted 和John之间差了12岁   On My Way to School   Today I got up very early in the morning. After I finished breakfast, I went to school. On my way to school I saw something lying on the ground. I picked it up and found it was a mobile phone. I was afraid I would be late for school. I had no time to wait for the owner. So I gave it to the policeman.   Shortly after I reached my school, the headmaster came to my class and praised me in front of the class. How could he   knew all about itI guess it must be the policeman who told him what I did.   I am very happy that I have done a good job. 就我在上学的路上   今天,我得到了很早就在上午。当我完成早餐,我去了学校。就我在上学的路上我看到的东西躺在地上。我挑选它,并发现这是一部手提电话。我恐怕我会迟到的学校。我没有时间去等待的所有者。因此,我给它的警察。   不久后,我达到了我的学校,校长来到我的班级,并赞扬我在前面的阶级。他怎么会知道的所有关于它呢?我猜想,它必须是警察谁告诉他,我所做的。   我很高兴我已经做得不错。 七年级英语作文 篇5   .My Day(我的一天)   I get up early at six every day. After doing some morning exercises, I read English for twenty minutes. At seven I have breakfast. After breakfast I take my schoolbag and go to school. Our class begins at eight, and we have four classes in the morning. After lunch at 12 o"clock, I take a short rest in the classroom. We have three more classes in the afternoon.After school at five , I go back home. I often help my mother do some housework. Sometimes I watch TV. After dinner, I begin to do my homework. Then I take a shower. I go to bed at nine thirty. 七年级英语作文 篇6   One afternoon, an old woman was crossing the street with a basket in her hand. she was going to do some shopping.   just then a car ran up fast and she was knocked down.   One of her legs was hurt and she couldn"t move any more. A kind cleaner saw this and rushed to her at once.   He helped her stand up and took her to the nearest hospital. What a warm-hearted man he was!   翻译:   某天下午,一个老奶奶手上拿着篮子正在过马路。   她正在去购物。就在那时一辆开得飞快的车把她撞倒了。她的一条腿受伤了,而且她也动不了了。一位好心的清洁工看到了这一幕就马上跑到老奶奶那里。   他帮助她站起来并把她送到最近的医院。他是一个多么热心肠的人啊! 七年级英语作文 篇7   Today is Monday,I get up at 6:30.Then,I take a shower and brush my teeth. Then I eat breakfast at 7:00. After breakfast I go to school at 7:30.   In the morning, I have many subject. they are English,math,and two Chinese. Then is eat lunch time,today I eat some bread. In the afternoon I have four class,too. They are computer,P.E.,biology and music.   After school I do my homework. then I eat dinner at 6:30. After dinner I read my book . Then I go to bed on 9:00. This is my day. Please tell me with your day.
2023-07-14 04:08:001

国开网上课程学完了进度还是不够

确保都学习完毕进度就会是100%。国家开放大学学习网是国家开放大学举办的在线教育平台。国开网上课程确保都学习完毕进度就会是100%。进度是进展的速度、进行工作的先后快慢的计划。
2023-07-14 04:07:581