I am building a list type to let users make lists of various things in my system. The list elements therefore need references to both the type and identifier of the things they will be pointing at.
Image that I have a huge database which stores threads and posts from different datasources like two different forums. For each datasource, the Id of the entity (e.g. ThreadId, PostId...) is unique bu
Database type: mysql Columns: Date,time,price1,qty1,price2,qty2 time will be in milliseconds number of records approx 5.5 million for a month.
I have to add some security for a C#/.NET WinForms/Desktop application. I am using Oracle DB back-end.
I\'ve got two tables: DOCU开发者_Python百科MENT -------- DOC_ID (PK) . . . SECTION ------- DOC_ID (FK, PK)
I\'m seeing lots of applications using hashes as surrogate keys instead of plain integ开发者_如何学Cers. I can\'t see any good reason for this kind of design.
My table schema is something like this 1. Master table : Clause Columns ClauseID = surrogate pk (identity)
Which one is the best practice and Why? a) Type Table, Surrogate/Ar开发者_如何学Pythontificial Key
Object A has a one-to-many association: many object B. When I look in the database -- TableB -- I\'d like to see the unique, readable string A.Name instead of having always to join or subselect on a
I got to populate FactTable with 12 lookups to dimension table to get SK\'s, of which 6 are t开发者_如何学JAVAo different Dim Tables and rest 6 are lookup to same DimTable (type II) doing lookup to sa
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