Synonyms are the aliases of the base table. They are defined only in the data dictionary and are not stored.
Synonyms provide location transparency for distributed databases, and there is no difference in accessing resources in different regions like accessing local resources.
(I) syntax
Syntax for creating Synonyms:
Private synonyms without publicA private synonym is a synonym created by a common user
The following are organized from Oracle's official documentationA conceptA synonym is an alias for any table, view,materialized view, sequence, procedure, function, package, type, Java Classschem A object, User-defined object type, or another synonym. Because a synonymis simply an alias, it requires no storage other than its definition in Thedata dictionary.Synonyms in Oracle are aliases for any table, view
Elevator DispatchA new office building is available, with a total + floor, there are four elevators, all elevators basic parameters are shown in the following table:
Elevator number
Service Floors available
Maximum number of passengers
Maximum Load weight
1
All floors
10
Approx.
2
Single layer
10
Approx.
3
I. System hardware module and interface definitionGenerally speaking, the elevator control system is divided into two parts, elevator well and elevator car two plate can control the movement of the elevator, and the power of the elevator is composed of components such as mot
Just uploaded a completely simulate our school library elevator program, there are readers can download to see (http://download.csdn.net/user/xiadasong007 ).
(Due to a post from Baidu, I was forced to be busy with this program all afternoon. Fortunately, it is quite simple)
Let's take a break today. Let's take a look at "Hero-Season One" and talk about the code implementation process tomorrow to see what is difficult?
2009.3.12
Simple Analysis of
1) Clarify the group control elevator SchedulingAlgorithmEvaluation IndicatorsBecause the length of the passengers' psychological waiting time, the speed of the elevator's response to the call ladder, the size of the passenger flow of the call Hall Station, and the number of passengers in the car are all vague concepts, it is difficult to define the relationship by exact quantity, or to describe it by using common logical rules.
In recent years, we
Elevator DispatchExisting new office building, a total of 21 floors, a total of four elevators, all elevators basic parameters are shown in the following table:
Elevator number
Service Floors available
Maximum number of passengers
Maximum Load weight
1
All floors
10
Approx.
2
Single layer
10
Approx.
3
D
Elevator Control ProjectFirst, the system hardware interface definition The whole system hardware interface is divided into human-computer interactive display and automatic control. The human-Computer interactive display is divided into elevator and elevator in the two environments;Elevator port = up/down button K + d
Background: Imagine, Shijiazhuang Railway University basic teaching building of the elevator configuration is as follows: the building has 1/storey, 4 elevators, many passengers use these elevators daily (passenger weight: Average 70 kg maximum 120 kg, minimum 45 kg). Other constant data: elevator speed, open/close time, passenger time to be in/out of the elevator
Requirements Research Report setting background: Shijiazhuang Railway University basic teaching building is a 18-storey building, its interior equipped with 4 elevators, students and teachers use elevator peak time relative concentration in each class/class, so the use of elevators with sudden and heavy load characteristics, so the design of reasonable elevator scheduling algorithm, Avoid the "bus", that is
ORACLE Synonyms (SYNONYM)
The following content is compiled from the official Oracle documents.Concept 1
A synonym is an alias for any table, view, materialized view, sequence, procedure, function, package, type, Java classschema object, user-defined object type, or another synonym. because a synonymis simply an alias, it requires no storage other than its defini
On October 16, August 26, a hand-held elevator injury accident occurred at the East Railway Station of Guangzhou. The injured were taken to hospital.
Within three days, the elevator accident occurred in guangshen successively. 21 citizens were taken to the hospital due to an elevator injury. The people in charge of Guangzhou Quality Supervision Bureau told the Ya
"Electromechanical drive Control" large operation-mechanical building Elevator control project (Phase 1)Hu Hengxiang Machine Android 1301first, the system hardware interface definition According to the operating characteristics of the elevator system, the hardware interface of the system can be divided into floor hardware interface, elevator internal hardware in
Oracle synonym learning. To create a synonym for a table on a remote database, you must first create a DatabaseLink (database connection) to expand
Oracle synonym learning. To create a synonym for a table on a remote Database, you must first create a Database Link (Database connection) to expand
The bumps also successively use C and C + + constructs a lot of elevators. Although not satisfied with the performance of the ego, but overall there is a certain harvest, the difference between C and C + + feel a little bit of the doorway ...The steps to construct the elevator in C language:The first step:Analyze what this elevator needs to do ———— take the passengers to the destination, record the time to
Concept
A graphical synonym is a representation of an object (table), which itself has no specific definition.
By graphically using synonyms, it is possible to use this object (table) in different places in the same physical diagram (physical diagram).
Role: In the physical diagram between the relationship between the lines as far as possible, through the establishment of synonymous word image (graphical
First, the system hardware interface definition1. Inside and outside the elevator Operation button and display screenThe operating interface of the elevator includes a floor button, a corresponding indicator light, an open Close button (Emergency call button) and a screen showing the current number of floors. The button has an interface to the indicator light and the CPU, and the screen has an interface to
The first step: connect the Good Line
Step Two: Enter O3 's management side
Third Step : Select the corresponding work mode
①
sender O3: client - side mode
②
receiving end O3: AP mode
Fourth Step : Confirm O3 whether the success of the secondary
Attached: Elevator monitoring full Wireless Application Mode
The line connection is shown in the following illustr
Elevator systemCandidates need to simulate the implementation of a simple elevator control system, the upper and lower floors of each floor request processing, give the elevator simulation running trajectory (in turn, output elevator each time the floor number of the door).Rules1. There are only 1 elevators operating i
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.