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Tài liệu NIEHS/EPA Children’s Environmental Health and Disease Prevention Research Centers: Protecting Children’s Health for a Lifetime pptx
... established by NIEHS and EPA, with a research emphasis on children s asthma and other respiratory diseases, as well as ways to reduce exposure to pesticides for children in agricultural settings 2004: ... 5-year Centers and 3-year Formative Centers, to increase flexibility and create a more dynamic network Children s Centers Program Successes: Examples Since the inception of the Children s Centers ... were less likely to have a child with autism 2010: The revised Children s Center program funds six 5-year Centers and six 3-year Formative Centers Research at the Formative Centers includes emerging...
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GENERAL FACT SHEET 2012/2013: Queen’s School of Business, Centre for International Management pptx
... James ajames@business.queensu.ca Mr Ben Whitney bwhitney@business.queensu.ca Ms Jennifer McNeely jmcneely@business.queensu.ca Ms Cindy Price cprice@business.queensu.ca (Americas, Asia, Australia, ... UK) Ms Jacoba Franks jfranks@business.queensu.ca (Central and Eastern Europe, including Turkey and Russia) Ms Tenay Bartzis tbartzis@business.queensu.ca Ms Lisa Harris exchange@business.queensu.ca ... exchange students whose first language is not English (for final exams only) SERVICES FOR STUDENTS International Students Service Non-Academic issues: Queen s University International Centre www.quic.queensu.ca...
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delphi - database application developer's book - delphi for windows
... InterBase The following table summarizes Delphi s database features Table 1.1 Database features summary Tool Purpose Data Access components Access databases, tables, stored procedures, and custom ... database servers To access a data source, a Delphi application uses Data Access components to establish a connection through the BDE The installation program for Delphi installs drivers and sets ... Client/Server Edition only Databases such as Microsoft Access, Btrieve, FoxPro, etc .DB dBASE ASCII files Local InterBase Server SQL Database Server: Oracle, Sybase, Microsoft SQL Server, Informix,...
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delphi - delphi component writer's guide- delphi for windows
... unit TestHide; { this is the main form file } interface uses SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls, Forms, Dialogs, HideInfo; { use the unit with TSecretForm } type ... interface uses SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls, Forms, Dialogs; type TSecretForm = class(TForm) { declare new form } procedure FormCreate(Sender: TObject); private ... NewTest Create a new project, then follow the steps to end up with a form unit that looks like this: unit Unit1; interface uses SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,...
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delphi - delphi user's guide - delphi for windows
... the uses clause It appears as uses SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; Delphi added the StdCtrls library unit because that is where the ... default uses clause: uses SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls, Forms, Dialogs; When you modify a form (discussed further, in following sections) by adding a component ... open windows Desktop And Symbols Choosing this option saves the same information as the Desktop Only option, plus symbol information from the last successful compilation The ObjectBrowser uses this...
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delphi - interbase user's guide - delphi for windows
... InterBase Server User s Guide PART Windows ISQL Part explains Windows ISQL, InterBase s interactive SQL tool Chapter 4: “Using Windows ISQL” describes how to use Windows ISQL Windows ISQL can be used ... closing its record stream and cursors and without freeing its system resources, then starts a new transaction and assigns the existing record streams and system resources to the new transaction ... ] Transaction options are fully described in the following sections Access Mode The access mode parameter specifies the type of access a transaction has for the tables it uses...
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delphi - sql links for windows user's guide - delphi for windows
... applications for use with SQL data, see your product-specific online Help for SQL and upsizing issues Default SQL query mode Under most circumstances, queries to SQL databases are processed on the SQL server ... information about SQL and RDBMS An example is C.J Date s An Introduction to Database Systems (Addison-Wesley, Reading, Massachusetts, 1983) Borland SQL Links for Windows Borland SQL Links for Windows ... database requests Although other types of network servers let most processing occur on the user s workstation, database servers are active, with most processing occurring on the database server itself...
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![joe celko's sql for smarties [electronic resource] advanced sql programming, fourth edition](https://media.store123doc.com/images/document/14/y/ih/small_ihs1401474034.jpg)
joe celko's sql for smarties [electronic resource] advanced sql programming, fourth edition
... conceptual difference is that a file is usually data that deals with a whole business process A file has to have enough data in itself to support applications for that one business rocess p ... in pessimistic locking systems, you can get serious performance problems because of lock contention when a transaction is in serial isolation The users are put in a single queue for access to ... just one user accessing the database at a time But one of the reasons you have a database system is that you also have multiple users who want to access it at the same time in their own sessions...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P84 pot
... tells to provide real-world insights into SQL programming His best-selling books include Joe Celko s SQL for Smarties: Advanced SQL Programming, second edition; Joe Celko s SQL Puzzles and Answers; ... He is well known for his 10 years of service on the ANSI SQL standards committee, his column in Intelligent Enterprise magazine (which won several Reader s Choice Awards), and the war stories he ... declarations, 390–91 global, 51, 392 for intermediate results, 757 local, 51, 392 storage space, 51 usefulness, 757–60 using, 392–93 VIEWs and, 391–95 See also Tables Text, in-line expansion, 380–82...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P1 doc
... Diane Cerra Andre Cuello George Morrison Asma Stephan Side by Side Studios Side by Side Studios Multiscience Press, Inc Multiscience Press, Inc Multiscience Press, Inc Multiscience Press, Inc ... Database Query Processing for Advanced Applications, Clement T Yu and Weiyi Meng Advanced Database Systems, Carlo Zaniolo, Stefano Ceri, Christos Faloutsos, Richard T Snodgrass, V S Subrahmanian, and ... Lynch Active Database Systems: Triggers and Rules For Advanced Database Processing, Edited by Jennifer Widom and Stefano Ceri Migrating Legacy Systems: Gateways, Interfaces, & the Incremental...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P2 potx
... Differences 23.6.3 Cumulative Percentages 23.6.4 Rankings and Related Statistics 23.6.5 Quintiles and Related Statistics Cross Tabulations 23.7.1 Crosstabs by Cross Join 23.7.2 Crosstabs by Outer Joins ... CASE Expression 11.1.1 The COALESCE() and NULLIF() Functions 11.1.2 CASE Expressions with GROUP BY 11.1.3 CASE, CHECK() Clauses and Logical Implication 11.1.4 Subquery Expressions and Constants ... Predicates 6.5.2 Standard SQL Solutions Math and NULLs Functions and NULLs NULLs and Host Languages Design Advice for NULLs 6.9.1 Avoiding NULLs from the Host Programs A Note on Multiple NULL Values...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P3 docx
... same time, full scale, serious SQL databases have become open source Firebird (http://firebird.sourceforge.net/) has most ANSI SQL-92 features, and it runs on Linux, Microsoft Windows, and a variety ... U .S Government described the SQL-99 standard as “a standard in progress” and required SQL-92 conformance for federal contracts The reason for the loyalty to SQL-92 is simple The FIPS-127 conformance ... President of Whitemarsh Information Systems Corporation and secretary of INCITS H2 for more than 20 years, has a great essay on this and other political aspects of SQL s history at www.wiscorp.com;...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P4 ppt
... DATABASE DESIGN Standard SQL allows you to use spaces, reserved words, and special characters in a name if you enclose them in double quotation marks, but this should be avoided as much as possible ... ALTER TABLE statement adds, removes, or changes columns and constraints within a table This statement is in Standard SQL; it existed in most SQL products before it was standardized It is still implemented ... contiguous storage accessed by two kinds of indexes; Teradata uses hashing; Nucleus (SAND Technology) uses compressed bit vector; Informix and CA-Ingres use more than a dozen different kinds of indexes...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P5 pptx
... For now, let us just consider the simplest case: ::= [CONSTRAINT ] REFERENCES [()] This relates two tables ... UNIQUE Constraints versus UNIQUE Indexes UNIQUE constraints are not the same thing as UNIQUE indexes Technically speaking, indexes not even exist in Standard SQL They were considered too physical ... UNIQUE constraint The syntax is: [CONSTRAINT ] FOREIGN KEY () REFERENCES [()] Referential Actions The REFERENCES clause can...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P6 docx
... Personnel AS P LEFT OUTER JOIN JobAssignments AS J ON P.ssn = J.ssn WHERE J.ssn IS NULL AND P.ssn IN (SELECT ssn FROM JobAssignments UNION SELECT ssn FROM Personnel))); However, this example is ... function should be cheap This assertion will also work CREATE ASSERTION Everyone_assigned_one_store CHECK ((SELECT COUNT(ssn) FROM JobAssignments) = (SELECT COUNT(ssn) FROM Personnel)); This is a surprise ... CREATE ASSERTION Everyone_assigned_at_least_once CHECK ((SELECT COUNT(DISTINCT ssn) FROM JobAssignments) = (SELECT COUNT(ssn) FROM Personnel)); You must be aware that the uniqueness constraints and...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P7 pot
... valid or not (for a discussion of check digits, see Joe Celko s Data and Databases: Concepts in Practice) So why people use them? System-generated values are a fast and easy answer to the problem ... 8, physical data independence) Dr Codd s rules are discussed in Chapter Early SQL products were built on existing file systems The data was kept in physically contiguous disk pages, in physically ... known_addressee constraint means that we have to have a line with some addressee for this to be a valid subscription The junk mail constraint ensures that anything not aimed at a known person is classified...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P8 potx
... is that in pessimistic locking systems, you can get serious performance problems resulting from lock contention when a transaction is in serial isolation The users are put in a single queue for ... then use this scalar expression: (SELECT COALESCE(MAX(seq), 0)+1 FROM FormsControl WHERE form_nbr = ‘Flob-1/R’), The COALESCE() will return a zero, thus ensuring that the sequence starts with ... the FormsControl table The next sequence number is easy to create, but you probably should restrict access to the base table with a stored procedure designed for one kind of form, along these...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P9 ppsx
... Because some SQL products, such as SQL Server and Sybase, allow the user to create implicit cursors, many newbies get this wrong This is easy to implement in products that evolved from sequential ... only those required for the desired result set This limitation will avoid unnecessary fetching of data, which in turn will require fewer server resources and increase cursor performance Use FOR READ ... finished Look for your product options For example, SQL Server has FAST_FORWARD and FORWARD_ONLY cursor options when working with unidirectional, read-only result sets Using FAST_FORWARD defines...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P10 pdf
... CAST (SUBSTRING (',' || I1.input_string || ',', MAX (S1 .seq || 1), FROM WHERE AND AND AND GROUP (S2 .seq - MAX (S1 .seq || 1))) AS INTEGER), COUNT (S2 .seq) AS place InputStrings AS I1, Sequence AS S1 , ... AS S1 , Sequence AS S2 SUBSTRING (',' || I1.input_string || ',', S1 .seq, 1) = ',' SUBSTRING (',' || I1.input_string || ',', S2 .seq, 1) = ',' S1 .seq < S2 .seq S2 .seq
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Joe Celko s SQL for Smarties - Advanced SQL Programming P11 potx
... both roles Consider a table for computing salesmen s bonus gifts, which has for each salesman his base salary, the number of sales points he has won in a contest, and the bonus gift awarded for that ... together as follows: SELECT BS.buyer, SL.seller, BL.lender FROM BuyerLender AS BL, SellerLender AS SL, BuyerSeller AS BS WHERE BL.buyer = BS.buyer AND BL.lender = SL.lender AND SL.seller = BS.seller; ... Thursdays at 13:00? This has the same problem as before What is the destination of the flight in query and 2? This has the same problem as before What gate is John leaving from on Thursdays at...
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