create er diagram online

open the stencil when we draw the ER diagram (open the stencil with a shape, file , and so on), and all the elements in the ER diagram will be displayed in a stencil. 2. Using Visio's own database model model to draw ER diagram

In the painting ER diagram when looking for a more useful and professional point of the tool, looking for a half-day finally chose the seemingly less professional EA to draw ER diagram Briefly explain how the EA is implemented to draw ER graphs First, the Operation proc

directionality, and there is a cardinality in each direction.ExampleThe link between "department" and "student" two entities is a one-to-many connection, in other words the link between "student" and "department" is a multi-pair connection. And a student must belong to a department, and can only belong to a department, can not belong to 0 departments, so from the "student" entity to "department" the base of the entity is "a", from the other side of the contact to consider, a department can have

database--the method of transforming from ER diagram to relational mapping Specific steps: 1.For each strong entity type E. Create a new table. Include as its columns, all the simple attributes and easy components of the composite attributes of E. Identify the PRI Mary Key and the alternate keys. Do not include any multi-valued attribute as a key. If The unique

the direction of the link, generally with a verb or a dynamic table.For example, the "Students to subject" group box should be filled in with "owning", and "belong" in the "Lessons to student" group box. (Here is just an example, maybe some words are not very reasonable).Vii. Mandatory definition of linkagesMandatory the mandatory relationship between the form and this direction. Select this check box to create a vertical line of contact lines on the

Online Design System for Ship Circuit Diagram Based on java web and. net activex plug-in and visio, activexvisio 1. Main objectives of the system: 1. Online circuit diagram design and circuit equipment selection; 2. online processing of Engineering Computing involved in circ

maps (MINDMAP) and wireframe (Wire frames). [Recommended index: ★★★★☆] Iplotz : is based on the Flash/flex platform product prototype design software, allows you to directly drag the various components through the mouse to the canvas to build their own Web project, in addition, Iplotz also provides the Adobe air based client software, This allows users to use the software on different platforms such as Windows, Mac OS x, and Linux. [Recommended index: ★★★☆☆] Hotgloo : is an easy and beautif

can be created less. 2, to avoid unnecessary drawing logic, when needed to draw. This needs to be adjusted based on the control's drawing logic, which is also very important. 3, the general principle is to do everything possible to control the implementation of the OnDraw method within 16ms, will not be card. Finally, look at the effect we've achieved. Source Address: GitHub Address The above is a small set to introduce Android to create cool

held a public hearing for executives David Donatelli. In general, the merger of HP and EMC will be a massive project. The powerful capital force is a rebirth or nightmare for the two to hold hands. Let's wait and see! (Click the original article link) [Welcome to the big data online public account] Big Data Online focuses on the dynamics of cloud computing, big data, storage, servers, and other enterpri

small question occurred while reading it, how does one deal with the [Backward] rollback ??? I am a very careless participant. When I click [next], I find that I should select another answer, so I have to click [Back] and fill in again, in this case, is the East-East in viewstate returned to the previous state, or is it in a new State? Then, when I clicked [next] Again, I suddenly changed my mind and wanted to change the choice of a previous question. I kept clicking [Back], result oh, oh ~~~~