
怎样才能更好地抢分,英语语法模糊不清,只靠感觉,平时也记单词,求抢分,高分技巧。
在SQL结构化查询语言中,LIKE语句有着至关重要的作用。
LIKE语句的语法格式是: * 表名 字段名 like 对应值(子串),它主要是针对字符型字段的,它的作用是在一个字符型字段列中检索包含对应子串的。
假设有一个数据库中有个表table1,在table1中有两个字段,分别是name和sex二者全是字符型数据。
现在我们要在姓名字段中查询以“张”字开头的记录,语句如下: * table1 name like 张*如果要查询以“张”结尾的记录,则语句如下: * table1 name like *张这里用到了通配符“*”,可以说,like语句是和通配符分不开的。
下面我们就详细介绍一下通配符。
匹配类型模式举例 及 代表值说明多个字符*c*c代表cc,cBc,cbc,cabdfec等它同于DOS命令中的通配符,代表多个字符。
多个字符%%c%代表agdcagd等这种方法在很多程序中要用到,主要是查询包含子串的。
特殊字符[*]a[*]a代表a*a代替*单字符?b?b代表brb,bFb等同于DOS命令中的
通配符,代表单个字符单数字#k#k代表k1k,k8k,k0k大致同上,不同的是代只能代表单个数字。
字符范围- []代表a到z的26个字母中任意一个 指定一个范围中任意一个 续上排除 [!字符] [!]代表9,0,%,*等 它只代表单个字符 数字排除 [!数字] [!0-9]代表A,b,C,d等 同上 组合类型 字符[范围类型]字符 cc[!a-d]#代表ccF#等 可以和其它几种方式组合使用假设表table1中有以下记录:name sex张小明 男李明天 男李a天 女王5五 男王清五 男下面我们来举例说明一下:例1,查询name字段中包含有“明”字的。
select * from table1 where name like '%明%'例2,查询name字段中以“李”字开头。
select * from table1 where name like '李*'例3,查询name字段中含有数字的。
select * from table1 where name like '%[0-9]%'例4,查询name字段中含有小写字母的。
select * from table1 where name like '%[]%'例5,查询name字段中不含有数字的。
select * from table1 where name like '%[!0-9]%'以上例子能列出什么值来显而易见。
但在这里,我们着重要说明的是通配符“*”与“%”的区别。
很多朋友会问,为什么我在以上查询时有个别的表示所有字符的时候用%而不用“*”
先看看下面的例子能分别出现什么结果:select * from table1 where name like *明*select * from table1 where name like %明%大家会看到,前一条语句列出来的是所有的记录,而后一条记录列出来的是name字段中含有“明”的记录,所以说,当我们作字符型字段包含一个子串的查询时最好采用“%”而不用“*”,用“*”的时候只在开头或者只在结尾时,而不能两端全由“*”代替任意字符的情况下。
形容模糊不清的成语
一:糊里糊涂[ hú lǐ hú tú ] 1. 【解释】:认识模糊,不明事理。
也形容思想处于模糊不清的状态。
2. 【示例】:糊里糊涂是办不好事的。
3. 【语法】:联合式;作谓语;指对事物认识不清。
二:混混沌沌[ hùn hùn dùn dùn ] 1. 【解释】:迷糊不清的样子,模糊一片,不分明。
2. 【出自】:清·吴趼人《二十年目睹之怪现状》第53回:“仍然不知稼穑艰难,混混沌沌的过日子。
”3. 【示例】:茫茫的东海和迷蒙的夜空连成一片,分不清哪里是水,哪里是天,~。
◎周而复《上海的早晨》第四部。
三:混淆黑白[ hùn xiáo hēi bái ] 1. 【解释】:混淆:使界限模糊。
故意把黑的说成白的,白的说成黑的,制造混乱。
指故意制造混乱,使人辨别不清。
2. 【出自】:《后汉书·杨震传》:“白黑溷淆,清浊同源。
”3. 【示例】:盖党史见纷争,~,虽稍与立异者,犹不可保,况素非其类邪
◎章炳麟《致梁启超书》四:迷离恍惚[ mí lí huǎng hū ] 1. 【解释】:迷离:模糊,不分明;惝恍:不真切,不清楚。
形容模糊而难以分辨清楚。
2. 【出自】:清·纪昀《阅微草堂笔记·槐西杂志三》:“惟留二百余金,恰足两月余酒食费,一定迷离惝恍,如梦乍回。
”3. 【语法】:联合式;作谓语、状语、定语;形容事物。
五:隐隐约约[ yǐn yǐn yuē yuē ] 1. 【解释】:指看起来或听起来模糊,不很清楚,感觉不很明显。
2. 【出自】:清·李汝珍《镜花缘》第十回:“只见山坡旁隐隐约约,倒象撺出一箭,直向大虫面上射去。
”3. 【示例】:天色渐晚,我看到星星隐隐约约渐次闪烁的身影.我隐隐约约听到背后传来一句凄凉的声音。
此英语作文有没有语法错误。
求大神指导。
有点模糊。
。
背单词不要每天都换,要在一段时间内只背这些单词
例如:一周内你背五个单元。
那这一周内,你就认定这五个单元了,死磕这五个单元了。
要根据自己情况来安排单元数量跟时间长度(别贪多)。
条件允许的建议听随单词书附带的MP3光盘。
然后下一段时间就下五个单元,期间复习一下之前的单元。
亲测有效。
单词最重要的就是重复。
一周内,死磕几个单元,真的是熟悉到不行, 就算少部分时间长忘记了。
随便翻翻书就又回来了。
单词要达到的要求就是,一看就知道什么意思,一听就知道什么意思, 就是每个单词都要达到跟 BOOK一样熟悉的要求。
像我这种记忆力超级烂的。
死记硬背试过又觉得非常痛苦坚持不下来。
然后我就当看小说一样看单词书,一边看一边听着MP3。
都能把托福单词搞下来。
每天有空就翻翻单词书,听MP3。
其实真要算下来。
。
一周内那些单词你已经看过几十次,听过几十次了。
把那些最终还是背不下来的,抄下来,继续有空就瞄一瞄。
语法方面的话,就是记例句。
把例句搞到滚瓜烂熟, 方法可以参照上面背单词的。
建议直接就自己不懂的语法方面问题直接问老师或者问会语法的朋友。
ps:其实在英语学习方面。
语法占的只是很小的一部分。
看的多你自然就会语法。
其实单词记不住是正常的, 非常的正常。
一点经验,又刚好看到。
参考下咯。
形容一个人说的话模糊,完全不说重点的成语是什么
rise[英] [raiz] [美] [raɪz] 生词本 vi. 上升; 增强; (数量)增加; 休会 n. (数量或水平的)增加; 兴起; (数量、价格、价值等的)增长; (日、月等的)升起 vt. 使……浮上水面; 使(鸟)飞起; 复活; 发酵 过去式: rose 过去分词: risen 现在分词: rising 第三人称单数: rises 易混淆的单词:RISE Rise 常用词组 get (或 take) a rise out of1. (非正式)(尤指因取笑)惹…恼怒on the rise1. 在增加;在增长;在上升;在上涨prices were on the rise. 价格在上涨。
rise and shine1. (非正式)快起床
(或醒醒吧
)rise to the baitrise with the sun (或 lark)1. 早起someone's star is rising1. 某人越来越成功(或受欢迎)查看更多同义词vi.1. “上升;上涨;升高;增加”释义下的同义词 mount go increase up ascend advance gain grow 2. “发源;发生;开始”释义下的同义词 appear start begin originate 3. “起来反抗”释义下的同义词 revolt rebel mutiny riot 4. “起立;站起;升起”释义下的同义词 ascend mount get stand soar up 其他释义下的同义词 stand appear arise gain increase accession riot kite get heave begin go mutiny originate emergence ascend rebel mushroom ridge climb up start advance ascent mount revolt appearance promotion grow 反义词vi.1. “上升;升高;增加”释义下的反义词 fall descend sink set 2. “上升;高涨”释义下的反义词 set descend fall 其他释义下的反义词 set abate descend 查看更多arise, rise, raise, lift这些动词均有“上升,举起”之意。
arise:书面用词,多用于诗歌或比喻中,具有特殊的修辞色彩。
rise:普通用词,指具体的或抽象的事物由低向高移动。
raise:及物动词,常用词,多指把某物从低处升到高处,有时作引申用。
lift:语气比raise强,指用体力或机械的力举起或抬起某物。
查看更多内容>> 相关词rise above self rise again rise and fall sawing machine rise and fall rise and falling saw rise at a feather rise clause rise from the dead rise from the gutter rise from the ranks rise in opposition to rise in price rise in revolt rise in the world rise of floor rise of stock rise on the knees rise superior to rise time correction rise time response 语源Old English rīsan 'make an attack', 'wake, get out of bed', of Germanic origin; related to Dutch rijzen and German reisen柯林斯高阶英汉双解学习词典《柯林斯COBUILD高阶英汉双解学习词典》(Collins COBUILD Advanced Learner's English-Chinese Dictionary)是柯林斯公司携手外研社为中国学习者量身定制的全新版本,突出强调了学习型词典的学习功能,同时在可读性和易用性方面均有大幅提升。
英英释义行业释义词霸iOS新版 跃居Appstore参考类免费应用Top1
1. VERB 动词上升;升高;升起 If something rises, it moves upwards. 【语法信息】:V from\\\/to n【语法信息】:V【语法信息】:V P from\\\/to n【语法信息】:V PHe watched the smoke rise from his cigarette...他注视着烟雾从香烟上升起。
The powdery dust rose in a cloud around him.一团粉尘在他周围扬起。
Rise up means the same as rise .rise up同rise Spray rose up from the surface of the water...水面溅起水花。
Black dense smoke rose up.浓浓的黑烟升起。
2. VERB 动词站起来 When you rise, you stand up. 【语法信息】:V from n【语法信息】:V【语法信息】:V P from n【语法信息】:Also V P【语域标签】:FORMAL 正式Luther rose slowly from the chair...卢瑟慢慢地从椅子上站起来。
He looked at Livy and Mark, who had risen to greet him.他看着站起来跟他打招呼的莉薇和马克。
Rise up means the same as rise .rise up同rise The only thing I wanted was to rise up from the table and leave this house.我只想从桌旁站起来,离开这所房子。
3. VERB 动词起床 When you rise, you get out of bed. 【语法信息】:V【语域标签】:FORMAL 正式Tony had risen early and gone to the cottage to work.托尼很早就起来去小屋干活了。
4. VERB 动词(太阳、月亮)升起,升空 When the sun or moon rises, it appears in the sky. 【语法信息】:VHe wanted to be over the line of the ridge before the sun had risen.他想在太阳升起以前翻过山脊。
5. VERB 动词矗立;耸立 You can say that something rises when it appears as a large tall shape. 【语法信息】:V prep\\\/adv【语法信息】:V P prep\\\/adv【STYLE标签】:LITERARY 文The building rose before him, tall and stately...那座高大宏伟的建筑耸立在他面前。
The towers rise out of a concrete podium.这些塔楼耸立在一个混凝土墩座上。
Rise up means the same as rise .rise up同rise The White Mountains rose up before me.怀特山矗立在我的面前。
6. VERB 动词升高;上升;上涨 If the level of something such as the water in a river rises, it becomes higher. 【语法信息】:VThe waters continue to rise as more than 1,000 people are evacuated.水面持续上涨,已经有1,000多人被疏散了。
...the tides rise and fall.潮水时涨时落。
7. VERB 动词(地面)升高,变陡 If land rises, it slopes upwards. 【语法信息】:V prep\\\/adv【语法信息】:V【语法信息】:V-ingHe looked up the slope of land that rose from the house...他抬头看了看屋后的斜坡。
The ground begins to rise some 20 yards away...地面在20码开外的地方开始升高。
The great house stood on rising ground.这座大房子建在一个斜坡上。
8. N-COUNT 可数名词上坡;斜坡 A rise is an area of ground that slopes upwards. 【搭配模式】:usu singThe pub itself was on a rise, commanding views across the countryside...酒吧本身就建在一个斜坡上,可以俯眺乡村风光。
I climbed to the top of a rise overlooking the ramparts.我爬到了一个可以俯瞰护城墙的坡顶。
9. VERB 动词(数量)上升,增长,上涨 If an amount rises, it increases. 【语法信息】:V from\\\/to amount【语法信息】:V by amount【语法信息】:V amount【语法信息】:V【语法信息】:V-ingPre-tax profits rose from £842,000 to £1.82m...税前利润从84.2万英镑上升到了182万英镑。
Tourist trips of all kinds in Britain rose by 10.5% between 1977 and 1987...英国各种旅游项目在1977至1987年间增多了10.5%。
Exports in June rose 1.5% to a record $30.91 billion...6月份的出口额上升了1.5%,创下309.1亿美元的历史最高纪录。
The number of business failures has risen...企业倒闭的数量增加了。
The increase is needed to meet rising costs.因为成本增加,这种上调是必要的。
10. N-COUNT 可数名词(数量的)上升,增长,上涨 A rise in the amount of something is an increase in it. 【搭配模式】:N in n...the prospect of another rise in interest rates...利率可能会再次上涨Foreign nationals have begun leaving because of a sharp rise in violence.因为暴力活动的急剧增加,外国人已经开始离开这个国家。
11. N-COUNT 可数名词(工资的)上涨,增加 A rise is an increase in your wages or your salary. 【语域标签】:BRIT 英He will get a pay rise of nearly £4,000.他的工资将会上涨将近4,000英镑。
in AM, use 美国英语用 raise12. N-SING 单数名词(运动或活动的)兴起,抬头,高涨 The rise of a movement or activity is an increase in its popularity or influence. 【搭配模式】:the N of n...the rise of racism in America.美国种族主义的抬头...the rise of home ownership.购房者的增多Usage Note : You should be careful not to confuse the verbs rise, raise, and arise. Rise is an intransitive verb and cannot be followed by an object, whereas raise is a transitive verb and is usually followed by an object. Rise can also not be used in the passive. The number of dead is likely to rise. ...the government's decision to raise prices. Both raise and rise can be used as nouns with meaning pay increase. Raise is used in American English, and rise is used in British English. Millions of Americans get a pay raise today. ...a rise of at least 12 per cent. 注意不要混淆动词rise, raise和arise。
rise是不及物动词,不能带宾语,而raise是及物动词,通常带宾语。
rise同样不能用于被动句中:The number of dead is likely to rise (死亡人数有可能增加),the government's decision to raise prices (政府提高物价的决定)。
raise和rise都可以用作表示加薪的名词,raise用在美国英语中,而rise用在英国英语中:Millions of Americans get a pay raise today (数百万美国人今天获得了加薪),a rise of at least 12 per cent (至少12%的加薪)。
13. VERB 动词(风力)加强,增强 If the wind rises, it becomes stronger. 【语法信息】:V【语法信息】:V PThe wind was still rising, approach-ing a force nine gale.风力仍在增强,接近9级大风。
Rise up means the same as rise .rise up同rise Foxworth shivered as the wind rose up and roared through the beech trees.风势渐大,在山毛榉树间呼呼吹过,福克斯沃思瑟瑟发抖。
14. VERB 动词(声音)变大,提高 If a sound rises or if someone's voice rises, it becomes louder or higher. 【语法信息】:V【语法信息】:V to n'Bernard?' Her voice rose hysterically...“伯纳德
”她歇斯底里地提高了嗓门。
His voice rose almost to a scream.他提高了嗓门,几乎在尖叫。
15. VERB 动词(声音)从…传来 If a sound rises from a group of people, it comes from them. 【语法信息】:V from n【语法信息】:V PThere were low, muffled voices rising from the hallway.从走廊里隐约传来了低沉的说话声。
Rise up means the same as rise .rise up同rise From the people, a cheer rose up.人群中传出了一阵欢呼声。
16. VERB 动词(感情)突然变得强烈,涌起 If an emotion rises in someone, they suddenly feel it very intensely so that it affects their behaviour. 【语法信息】:V【语法信息】:V in nA tide of emotion rose and clouded his judgement...心头涌起一阵强烈的感情,模糊了他的判断力。
The thought made anger rise in him and he went into a bar and had a double whisky.这个想法让他怒火直冒,于是他去了一家酒吧,要了双份的威士忌。
17. VERB 动词(因为生气、尴尬或兴奋)脸红,涨红脸 If your colour rises or if a blush rises in your cheeks, you turn red because you feel angry, embarrassed, or excited. 【语法信息】:V in n【语法信息】:Also VAmy felt the colour rising in her cheeks at the thought.埃米一想到这件事,就觉得脸红。
18. VERB 动词起义;反抗;造反 When the people in a country rise, they try to defeat the government or army that is controlling them. 【语法信息】:V against n【语法信息】:Also V【语法信息】:V P【语法信息】:V P against nThe National Convention has promised armed support to any people who wish to rise against armed oppression.国民议会承诺向所有想要反抗武装压迫的人提供武装支持。
Rise up means the same as rise .rise up同rise He warned that if the government moved against him the people would rise up...他警告说如果政府对他采取不利行动,人民就会起来造反。
A woman called on the population to rise up against the government.一位女性号召人们起来反抗政府。
rising ...popular risings against tyrannical rulers.反对暴君的民众起义19. VERB 动词升职;升迁;地位提高;变得更成功 If someone rises to a higher position or status, they become more important, successful, or powerful. 【语法信息】:V prep【语法信息】:V P prepShe is a strong woman who has risen to the top of a deeply sexist organisation...她是一个女强人,已经升至一个性别歧视意识根深蒂固的组织的最高层。
From an unlikely background he has risen rapidly through the ranks of government.虽然没有什么背景,但他在政府中的地位仍然迅速提高。
Rise up means the same as rise .rise up同rise I started with Hoover 26 years ago in sales and rose up through the ranks.我26年前加入胡佛公司时做的是销售工作,后来级级攀升。
20. N-SING 单数名词升迁;日益成功;地位的提高 The rise of someone is the process by which they become more important, successful, or powerful. 【搭配模式】:with possHaig's rise was fuelled by an all-consuming sense of patriotic duty...黑格非常强烈的爱国主义责任感使他的地位大大提高了。
The group celebrated the regime's rise to power in 1979.这个集团庆祝该政府于1979年上台执政。
21. PHRASE 短语引起;使发生 If something gives rise to an event or situation, it causes that event or situation to happen. 【搭配模式】:V inflectsLow levels of choline in the body can give rise to high blood-pressure...体内胆碱水平过低会引起高血压。
The picture gave rise to speculation that the three were still alive and being held captive.这张照片让人们猜测这3个人还活着,而且被囚禁起来了。
22. to rise to the bait→see: bait; to rise to the challenge→see: challenge; to rise to the occasion→see: occasion;
oracle中如何使用like来进行模糊匹配
like匹配符有:%:0个或多个任意字符_:一个任意字符like '%a' :以a结尾的字符串like 'a%' :以a开始的字符串like '%a%' :包含a开始的字符串下划线类似
清楚辨析一般过去和现在完成,不想了解语法书上笼统模糊都抽象概念。
简单明了,通俗易懂,接地气的国语
一般过去和现在完成 动作或状态都是发生在过去。
前者强调在过去发生过某个动作或存在某种状态,与现在没有关系。
后者强调在过去发生过的动作或存在的状态对现在的影响,强调结果对现在的影响,与现在有关系。
如 我吃过饭了。
如果 用一般过去时 ,不能判断你现在的情况,可能不饿 也可能饿。
如果 用现在完成时 ,就能判断你现在的情况,你现在不饿 了。



