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joe celkos sql puzzles answers

Tài liệu SQL Puzzles & Answers- P1 pdf

Tài liệu SQL Puzzles & Answers- P1 pdf

Cơ sở dữ liệu

... Samet Joe Celko’s SQL for Smarties: Advanced SQL Programming, Third Edition Joe CelkoMoving Objects DatabasesRalf Hartmut Güting and Markus Schneider Joe Celko’s SQL Programming Style Joe CelkoData ... Jim Gray, Microsoft Research Joe Celko’s Analytics and OLAP in SQL Joe CelkoData Preparation for Data Mining Using SASMamdouh RefaatQuerying XML: XQuery, XPath, and SQL/ XML in ContextJim Melton ... standard was SQL- 86, and the SQL- 92 standard was a design goal for the database vendors. Today, most vendors have gotten most of SQL- 92 into their products. The design goal is now the SQL- 99 standard’s...
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Tài liệu SQL Puzzles & Answers- P2 pptx

Tài liệu SQL Puzzles & Answers- P2 pptx

Cơ sở dữ liệu

... certain SQL- 92 features. Answer #2Richard Romley once more cooked my published solution by collapsing the two SELECT statements into a CASE expression with the extrema functions in SQL- 92 ... FIND THE LAST TWO SALARIESJack Wells sent this perplexing SQL problem in June 1996 over CompuServe. His situation is pretty typical for SQL programmers who have to work with 3GL people. The programmers ... He said “in a truly relational language it could be done, but since SQL is not relational it isn’t possible, not even with SQL- 92.” Sounds like a challenge to me!Oh, I forgot to mention an additional...
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Tài liệu SQL Puzzles & Answers- P3 pptx

Tài liệu SQL Puzzles & Answers- P3 pptx

Cơ sở dữ liệu

... NULL END) > 5) AND S1.stand_nbr = N1.stand_nbr;Answer #5Richard Romley proposed several answers in SQL- 92 syntax in September 1997.SELECT N1.stand_name FROM (SELECT S1.stand_nbrPlease purchase ... P.emp_name = C.emp_name AND P.pos = 2 WHERE C.pos = 1;Answer #8Here is an SQL: 2003 version, with OLAP functions and SQL- 92 CASE expressions from Dieter Noeth: SELECT S1.emp_name, MAX (CASE ... need to delete Bob and Joe, but not Mark and Wayne. Answer #1A first attempt might try to do too much work, but translating the English specification directly into SQL results in the following:DELETE...
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Tài liệu SQL Puzzles & Answers- P4 ppt

Tài liệu SQL Puzzles & Answers- P4 ppt

Cơ sở dữ liệu

... occurrences on the payroll. How would you write this query in SQL- 89? In SQL- 92? In SQL- 99? Answer #1 SQL- 89 lacks the orthogonality that SQL- 92 has, so the best way is probably to build a VIEW ... variety and not performance. Answer #1You could use the SIGN() function in Sybase and other SQL products. This function returns -1, 0, or +1 if the argument is negative, zero, or positive, ... :my_tos ; set task codeThe trouble with this trick is that it might not be optimized in your SQL. This can be worse than the self-join.Answer #3You could try using UNION ALL operators and...
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Tài liệu SQL Puzzles & Answers- P5 doc

Tài liệu SQL Puzzles & Answers- P5 doc

Cơ sở dữ liệu

... (&apos ;Joe& apos;, 'A', 3), (&apos ;Joe& apos;, 'A', 2), (&apos ;Joe& apos;, 'A', 3), (&apos ;Joe& apos;, 'A', 3), (&apos ;Joe& apos;, 'B', 3), (&apos ;Joe& apos;, ... BY R2.personHAVING COUNT(*) = 2;In SQL- 92, you will have no trouble putting a UNION into a VIEW, but some older SQL products may not allow it. Answer #4 SQL- 92 has a CASE expression and you ... ANSI/ISO SQL- 92 stuff than we did before. There are some really neat solutions that didn’t exist before if we learn to think in terms of the new features; the same thing applies to SQL- 99 features....
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Tài liệu SQL Puzzles & Answers- P6 ppt

Tài liệu SQL Puzzles & Answers- P6 ppt

Cơ sở dữ liệu

... exercise. Since SQL has no “UN-COUNT(*) DE-GROUP BY ” operators, you will have to use a cursor or the vendor’s 4GL to do this. Frankly, I would do this in a report program instead of an SQL query, ... with a key. But let’s look for weird answers since this is an exercise. Answer #1The obvious procedural way to do this would be to write a routine in your SQL s 4GL that reads a row from the ... single piece of SQL that will give him the output he wants, given the above tables? Answer #1Bob Badour suggested that he can get the required result by creating a view in SQL- 89:CREATE VIEW...
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Tài liệu SQL Puzzles & Answers- P7 docx

Tài liệu SQL Puzzles & Answers- P7 docx

Cơ sở dữ liệu

... (and other versions of SQL back then) had a proprietary NUMBERS(*) function that begins at 1 and returns an incremented value for each row that calls it. The current SQL Standard now has a ... part of the official SQL- 92, so technically we should have been writing this out with integer arithmetic. But it is such a common vendor extension, and it does show up in the SQL- 99 standard, that ... name4============================== Al Ben Charlie DavidEd Frank Greg HowardIda Joe Ken Larry Mike NULL NULL NULL or any other number across? Can you write single SQL statements that will generate each of these results?Answer...
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Tài liệu SQL Server 2000 Fast Answers for DBAs and Developers pptx

Tài liệu SQL Server 2000 Fast Answers for DBAs and Developers pptx

Kỹ thuật lập trình

... InstanceNameMSSQLSERVER when the default instance; otherwise, aunique name for a named instance[SetupTypeSQL-0] szDirDirectory where SQL Server program files are installed[SetupTypeSQL-0] szDataDirDirectory ... a new instance of SQL Server, or install Client Tools. With SQL Server 2000, you caninstall multiple instances of SQL Server on the same server. For more information, see SQL ServerInstances ... installation CD are: sqlins.batStandard unattended installation sqlins.issStandard unattended installation settings file sqlcli.batClient-only unattended installation sqlcli.issClient-only...
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Giáo trình SQL server

Giáo trình SQL server

Quản trị mạng

... năng sau: + Registry SQL Server: Đăng ký các nhóm (group) để truy nhập vào Microsoft SQL Server + Edittion SQL Server Registration: Cấu hình của Microsoft SQL Server + SQL Server Query Analyzer: ... Microsoft SQL Server 7.0 Standard Edition + Microsoft SQL Server 7.0 Enterprise Edition Ngoài ra các phiên bản sau : + Microsoft SQL Server 7.0 office 2000 Edition + Microsoft SQL Server ... bạn thiết lập các ứng dụng trên SQl Server, Transact SQl là giao diện quan trọng nhất giữa SQL Server database và ứng dụng, khi đang sử dụng chơng trình Transact SQL có hai khả năng thuộc tính...
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Giáo trình SQL Server 2005

Giáo trình SQL Server 2005

Quản trị mạng

... SQL 192 Structured Query Language (SQL) 202.1 SQL là ngôn ngữ của cơ sở dữ liệu quan hệ 202.2 Vai trò của SQL 202.3 Giới thiệu sơ lược về Transact SQL (T -SQL) 212.3.1 Ngôn ngữ định nghĩa dữ ... dữliệu.7Cài đặt SQL Server 2005 Express Edition: Microsoft SQL Server 2005 Express Edition làphiên bản miễn phí, dễ sử dụng và “nhẹ” của Microsoft SQL Server 2005. Microsoft SQL Server 2005 ... về SQL Server 2005 SQL Server 2005 là một hệ thống quản lý cơ sở dữ liệu (Relational DatabaseManagement System (RDBMS) ) sử dụng Transact -SQL để trao đổi dữ liệu giữa Clientcomputer và SQL...
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