using joe stewart s truman
Tài liệu Parallel Port Complete: Programming, Interfacing, & Using the PC''''s Parallel Printer Port ppt
Ngày tải lên :
22/01/2014, 11:20
... Choosing a Switch Logic Outputs Bipolar Transistors MOSFETs High-side Switches Solid-state Relays Electromagnetic Relays Controlling the Bits X-10 Switches Signal Switches 143 Simple CMOS Switch ... This displays the value of a Status port at 379h: unsigned StatusAddress=0x379; int StatusPort; StatusPort=inp(StatusAddress); printf ("Status port = %Xh\n",StatusPort); return 0; Pascal Pascal ... adds five registers at base address + through base address + 7, and an ECP adds three registers at base address + 400h through base address + 402h For a base address of 378h, the EPP registers...
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JOE CELKO’S SQL PUZZLES & ANSWERS Second Edition ppt
Ngày tải lên :
22/03/2014, 12:20
... JOE CELKO S SQL PUZZLES & ANSWERS Second Edition The Morgan Kaufmann Series in Data Management Systems Series Editor: Jim Gray, Microsoft Research Joe Celko s Analytics and OLAP in SQL Joe ... Morrison Asma Palmeiro Side by Side Studios Side by Side Studios Eric DeCicco Multiscience Press, Inc Multiscience Press, Inc Multiscience Press, Inc Multiscience Press, Inc The Maple-Vail Book ... Fiscal Year Tables Absentees The Anesthesia Puzzle Security Badges Alpha Data Hotel Reservations Keeping A Portfolio Scheduling Printers Available Seats Wages Of Sin Work Orders Claims Status...
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Source investigation of a small event using empirical Green’s functions and simulated annealing ppt
Ngày tải lên :
23/03/2014, 13:20
... may assume a linear scaling between the two earthquakes; this is the basic self-similar assumption of the E G F method With this hypothesis, we can use recordings of the small earthquake as the ... the slip velocity is assumed constant and defined by the specified focal mechanism of the main shock In summary, the first step consists of finding the appropriate STF at each station by using ... events and likeness of focal mechanisms the northern side leads us to consider the August 16 event as a possible empirical A seismic network was deployed in 1991 July and August, Green 's function...
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algorithm collections for digital signal processing applications using matlab - e.s. gopi
Ngày tải lên :
08/04/2014, 09:57
... this book sucessfully Special thanks to my family members father Mr E.Sankara subbu, mother Mrs E .S. Meena, Sisters R.Priyaravi, M.Sathyamathi, E .S. Abinaya and Brother E .S. Anukeerthi Thanks E .S. Gopi ... and 0.5 respectively Heuristic crossover identifies the best and worst chromosomes as mentioned below Best chromosome is one for which the fitness value is maximum Worst chromosome is one for ... cross over as described above (i.e) If the condition is not satisfied for ‘N’ attempts, C2=Wt is returned as the second chromosome after crossover 2.3.3 Arith crossover Let the two chromosomes...
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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/medium_ihs1401474034.jpg)
joe celko's sql for smarties [electronic resource] advanced sql programming, fourth edition
Ngày tải lên :
31/05/2014, 01:20
... database 2.2.2 Consistency When the transaction starts, the database is in a consistent state and when it becomes persistent in the database, the database is in a consistent state The phrase “consistent ... allows this The SQL standards not say how you are to achieve these results However, there are two basic classes of concurrency control methods—optimistic and pessimistic Within those two classes, ... each transaction In this sense, a database is more like a collection of objects than a traditional passive file system 10 Chapter 1 DATABASES VERSUS FILE SYSTEMS A table is not a spreadsheet,...
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Joe Celko''''s SQL Puzzles and Answers, Second Edition, Second Edition pot
Ngày tải lên :
27/06/2014, 06:20
... portfolio superseded this portfolio SELECT S1 .file_id, ' superseded ', S2 .file_id, ' on ', S2 .suc_date FROM Succession AS S1 , Succession AS S2 WHERE S1 .chain = S2 .chain AND S1 .next = S2 .next + AND S1 .file_id ... Cerra George Morrison Asma Palmeiro Side by Side Studios Side by Side Studios Eric DeCicco Multiscience Press, Inc Multiscience Press, Inc Multiscience Press, Inc Multiscience Press, Inc The Maple-Vail ... ABSENTEES This is a trick newbies miss because storing a zero seems to be a waste of space, but zero is a number and the event is a fact that needs to be noted UPDATE Absenteeism SET severity_points=...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P84 pot
Ngày tải lên :
06/07/2014, 09:20
... 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; ... 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 ... 744 See also Set operators UNIQUE constraints, 14, 741 defined, 14 nested, 18–22 UNIQUE indexes vs., 17 UNIQUE indexes, 17 Uniqueness constraints, 31 UNIQUE predicate, 314–15 defined, 314 syntax,...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P1 doc
Ngày tải lên :
06/07/2014, 09:20
... 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 The Maple-Vail ... ASSERTION Constraints 1.1.8 Using VIEWs for Schema Level Constraints 1.1.9 Using PRIMARY KEYs and ASSERTIONs for Constraints 1.1.10 Avoiding Attribute Splitting 1.1.11 Modeling Class Hierarchies in DDL ... Publishers is an imprint of Elsevier 500 Sansome Street, Suite 400, San Francisco, CA 94111 This book is printed on acid-free paper © 2005 by Elsevier Inc All rights reserved Designations used...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P2 potx
Ngày tải lên :
06/07/2014, 09:20
... 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 ... 23.7.3 Crosstabs by Subquery 23.7.4 Crosstabs by CASE Expression Harmonic Mean and Geometric Mean Multivariable Descriptive Statistics in SQL 23.9.1 Covariance 23.9.2 Pearson s r 23.9.3 NULLs in Multivariable...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P3 docx
Ngày tải lên :
06/07/2014, 09:20
... this case, he seems to be quite right But strangely enough, even with all the turmoil, the ANSI/ISO Standard SQL-92 is still the common subset that will port across various SQL products to useful ... thousands of application programs possibly working against each other SQL has spawned a whole branch of data modeling tools devoted to designing its schemas and tables Most of these tools use ... 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
Ngày tải lên :
06/07/2014, 09:20
... physical file In fact, almost no two SQL products use the same internal structures SQL Server uses physically contiguous storage accessed by two kinds of indexes; Teradata uses hashing; Nucleus ... 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...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P5 pptx
Ngày tải lên :
06/07/2014, 09:20
... answer is that this is an error that a smart optimizer will spot I leave same-sex marriages as an exercise for the reader The Couples table allows us to insert these rows from the original set ... the section on transaction control 1.1.4 UNIQUE Constraints versus UNIQUE Indexes UNIQUE constraints are not the same thing as UNIQUE indexes Technically speaking, indexes not even exist in Standard ... tables Most SQL products have not implemented them, so I will not mention them anymore Standard SQL has deferrable constraints This option lets the programmer turn a constraint off during a session,...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P6 docx
Ngày tải lên :
06/07/2014, 09:20
... 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 overkill and does not prevent ... CREATE ASSERTION Everyone_assigned_one_store CHECK ((SELECT COUNT(ssn) FROM JobAssignments) = (SELECT COUNT(ssn) FROM Personnel)); This is a surprise to people at first, because they expect to see ... KEY (ssn, store_nbr)); Then use a COUNT(DISTINCT ) in the assertion CREATE ASSERTION Everyone_assigned_at_least_once CHECK ((SELECT COUNT(DISTINCT ssn) FROM JobAssignments) = (SELECT COUNT(ssn)...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P7 pot
Ngày tải lên :
06/07/2014, 09:20
... existing file systems The data was kept in physically contiguous disk pages, in physically contiguous rows, made up of physically contiguous columns, in short, just like a deck of punch cards ... 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 ... plans for the same statements Want to try to maintain such a system? 1.2 Generating Unique Sequential Numbers for Keys 1.2.2 39 ROWID and Physical Disk Addresses Oracle has the ability to expose...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P8 potx
Ngày tải lên :
06/07/2014, 09:20
... bad news 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 ... user at a time by using SET ISOLATION = SERIALIZABLE Various SQL products will have slightly different ways of achieving this effect, based on their concurrency control methods More bad news ... Tables,” Datamation, January 1989 1.4 Other Schema Objects Let s be picky about definitions A database is the data that sits under the control of the database management system (DBMS) The DBMS has...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P9 ppsx
Ngày tải lên :
06/07/2014, 09:20
... clause is part of a cursor, not part of a SELECT statement Because some SQL products, such as SQL Server and Sybase, allow the user to create implicit cursors, many newbies get this wrong This is ... for cursors inside the database is not to use them SQL engines are designed for set processing, and they work better with sets of data than with individual rows The times when using cursor is unavoidable ... sequential file system CLOSE Statement The CLOSE statement resets the cursor read/write head to a position before the first row in the cursor The cursor still exists, but must be reopened...
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Joe Celko s SQL for Smarties - Advanced SQL Programming P10 pdf
Ngày tải lên :
06/07/2014, 09:20
... 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
Ngày tải lên :
06/07/2014, 09:20
... 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; ... it violates the FDs and common sense Here is an example of a schema that is allowable in this proposed schema, but is undesirable given our constraints: PlannedSchedule flight hour destination ... (room, time_period) constraint clause to the table Classes There are some other interesting and useful “higher” normal forms, but they are outside of the scope of this discussion In our example,...
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