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Pertemuan 4. Aljabar Relational

Dear Students,

Silahkan diunduh materi untuk pertemuan 4 mengenai Aljabar Relational. Meskipun namanya berbau matematika namun isi materi aljabar relational lebih berkaitan dengan tabel di dalam sebuah basis data. 64 more words

Sistem Basis Data

WPC: Harmony

Where two elements intersect.

This is an old tree.  The highest wheel is about 20 feet from the ground.  These were for the laundry lines at the back of a house that was built in 1950. 


SQL Server - Expressions, Conditions, and Operators


Expressions, Conditions, Operators, Comparison Operators, Character Operators, Logical Operators, Set Operators, UNION and UNION ALL, INTERSECT, Miscellaneous Operators: IN and BETWEEN.



LINQ - LINQ provider, Select, SelectMany, Any, All, Contains, into, let, Union, Intersect, Except, data context class in LINQ


Fast between SingleOrDefault and FirstOrDefault, LINQ provider, advantages of using LINQ on DataSet, difference between Select and SelectMany in LINQ, difference among Any, All and Contains, difference between into and let keyword in LINQ, Union, Intersect and Except, extension of the file, when LINQ to SQL is used, data context class, deferred execution and immediate execution. 18 more words



Peas of a pod

And cards of a set

Parallel lines

That don’t intersect 68 more words


How to mimic MINUS ALL and INTERSECT ALL in Oracle

Some databases, such as PostgreSQL and Teradata, natively support “ALL” keyword with SET operators MINUS (EXCEPT) and INTERSECT. As of current version, Oracle does not support these features; however, a little trick can help emulating the missing functionality. 261 more words

Tricks And Workarounds

Le Monde puzzle [#937]

A combinatoric Le Monde mathematical puzzle that resembles many earlier ones:

Given a pool of 30 interns allocated to three person night-shifts, is it possible to see 31 consecutive nights such that (a) all the shifts differ and (b) there are no pair of shifts with a single common intern?

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