DELETE ALL DUPLICATE RECORDS IN A TABLE

Jennifer Widom
Constraints Triggers
Triggers –
Introduction
Jennifer Widom
Triggers
Triggers
“EventConditionAction Rules”
When event occurs, check condition; if true, do action
1) Move monitoring logic from apps into DBMS
2) Enforce constraints
 Beyond what constraint system supports
 Automatic c[r]

The Wonderful Wizard of OzBy L. Frank BaumIntroductionFolklore, legends, myths and fairy tales have followed childhood through the ages, for every healthyyoungster has a wholesome and instinctive love for stories fantastic, marvelous and manifestly unreal.The winged fairies of Grimm and Ander[r]

SQL Primer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591SELECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591INSERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[r]

Although the complete genome sequences of over 50 representative
species have revealed
the many duplicated genes in all
three
domains of life
1–4
, the roles of gene duplication in organismal
adaptation and biodiversity are
poorly understood. In
addition,
the evolutionary forces
behind the functiona[r]

U. S. Department of Transportation
National Highway Traffic Safety Administration
National Center for Statistics and Analysis
Washington, D.C. 20590FARS Analytic Reference Guide Table of Contents  1
Table of Contents
2010 FARSNASS GES Standardization.................................................[r]

Chapter 2 - Microsoft Project DemystifiedIntroductionThe Building Blocks: Tasks, Resources, and AssignmentsTasksResourcesAssignmentsWhere Does Your Data Go? The Flow of Information Within Microsoft ProjectData Central: The Microsoft Project DatabaseView the Right Set of Project InformationData Lost[r]

POINTS:1REFERENCES: 52Essay72. How does a DBMS that follows the relational model handle entities, attributes of entities, and relationships betweenentities?ANSWER:Entities and attributes are fairly simple. Each entity has its own table. The attributes of an entity becomethe columns [r]

Various quantitative analyses are required for complex and dynamic nature of water resources systems to manage it properly. Groundwater table fluctuations over time in shallow aquifer systems need to be evaluated for formulating or designing an appropriate groundwater development scheme. This paper[r]

MATSUOKA Kazuhisa
Vice President
Japan International Cooperation Agency
Tokyo
Subject: Letter of Transmittal
Dear Sir,
We are pleased to formally submit herewith the final report of the Comprehensive
Urban Development Programme in Hanoi Capital City in the Socialist Republic of Vietnam.
This report[r]

Câu 1: Để hiển thị thanh công cụ Formatting của word cần thực hiện thao tác nào trong các thao tác sau?
A. Insert  Formatting. B. Tools  Options  Toolbars  Formatting.
C. Window  Arrange all D. View  Toolbar  Formatting
Câu 2: Để kết nối mạng không dây ta cần có thiết bị mạng nà[r]

... stroking, brushing, holding, pushing, and pulling touches (Reece & Schirmer, 2013) Additionally, this study examined instrumental touch based on maternal intention as in when the mother was fixing... Schirmer, 2013) The descriptions of all touch actions are listed in Table of the results section[r]

I.Tạo bảng và thiết lập mối quan hệ giữa các bảng.
CREATE TABLE CTDONDH
(Sohd char(4) not null,
MaVTu Char(4) not Null,
Constraint K1
Primary Key (Sohd,MaVTu)
)

CREATE TABLE DONDH
( SoHD char (4) not null primarykey,
NgayDH datetime,
MaNhaCC char(3) Not Null,
Foreign key (MANHACC) References NHACC[r]

N. Hounsfield and Professor Allan M. Cormack, who shared the 1979 Nobel Prizein Medicine for their invention. It is interesting to note that X-rays were discovered in 1895 by Wilhelm Conrad Roentgen, for which he received the 1901 NobelPrize for Physics. These two inventions, nearly 100 years[r]

I. Use the correct tense of the verbs in brackets to complete the following passage.
1.a . Albert Maltz was a progressive American writer. He …… (be) born in 1908. He …..
(write) his first play “Peace on Earth” in 1943. It …… (be) against wars, so the American
police ….. (arrest) him and ….. (put) h[r]

We now tackle the second problem that paging introduces: page tables are too big and thus consume too much memory. Let’s start out with a linear page table. As you might recall1, linear page tables get pretty big. Assume again a 32bit address space (232 bytes), with 4KB (212 byte) pages and a 4byte[r]

January to mid-March and Summer Term from early April to midJuly. Each term is separated by a one-week break called half term,usually at the end of October, mid-February and the end of May.There are two parallel school systems in England. The first is the stateschool system, which is f[r]

THE CONTENTS OF THIS WORK AND SPECIFICALLY DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE. NO WARRANTY MAY BECREATED OR EXTENDED BY SALES OR PROMOTIONAL MATERIALS. THE ADVICE AND STRATEGIESCONTAINED HEREIN MAY NOT BE SUITABLE FOR EV[r]

Would you rather choose your own roommate?If my university had us share our dormitories with another person, Iwould rather choose my own roommate than allow the university tochoose those with whom I have to live. In fact, if I can choose myroommate, I will have the possibility to look for som[r]

22.5 All routine check tests shall be made at room temperature.23. Certification23.1 When test reports are requested, in addition to therequirements of Specification A 530/A 530M, the producer orsupplier shall furnish to the purchaser a chemical analysisreport for[r]

English Banana.comCity Quiz SeriesAround Derby Museum and Art Gallery 11. In the ‘Joseph Wright of Derby’ gallery, complete the table with the names and datesof these paintings:Painting:The ____________________’s ShopThe Wood ____________________A Philosopher Lecturing on the __[r]