database-schema

How to fix Error: “Could not find schema information for the attribute/element” by creating schema

由 为君一笑 提交于 2019-11-26 18:05:17
I have a windows forms application written in VS2010 with C# and get the following errors in the app.config file: Message 4 Could not find schema information for the attribute 'name' Message 8 Could not find schema information for the attribute 'name' Message 12 Could not find schema information for the attribute 'name' Message 5 Could not find schema information for the attribute 'serializeAs' Message 15 Could not find schema information for the element 'CCP_Utility.Settings1' Message 2 Could not find schema information for the element 'CCP_Utility.Properties.Settings' Message 3 Could not

Need help in developing DB logic

由 寵の児 提交于 2019-11-26 17:51:18
问题 This is a mini-project of mine - Airline reservation system - lets call this airline FlyMi : I have a database (Not decided which one, friend of mine wants to go with MongoDB). Anyhoo, this is my requirement : I have a table which has details of the flight - Flight number, schedule etc. I'm going to use this table to perform various operations - booking , cancellation , modification This is where I'm stuck : For the desktop app and the web application - I'm offering an option to select seats.

Entity-Attribute-Value Table Design

由 北慕城南 提交于 2019-11-26 17:40:43
I am currently designing a database structure for the products section of an ecommerce platform. It needs to be designed in such a way that makes it possible to sell an infinite number of different types of products with an infinite number of different attributes. E.g. The attributes of a laptop would be RAM, Screen Size, Weight, etc. The attributes of a book would be Author, ISBN, Publisher, etc. It seems like an EAV structure would be most suitable. Select a product Product belongs to attribute set Attribute set contains attributes x and y Attribute x is data type datetime (values stored in

Should I use a single or multiple database setup for a multi-client application?

由 左心房为你撑大大i 提交于 2019-11-26 15:03:48
问题 I am working on a PHP application that intends to ease company workflow and project management, let's say something like Basecamp and GoPlan. I am not sure on what the best approach is, database-wise. Should I use a single database and add client-specific columns to each of the tables, or should I create a database for each new client? An important factor is automation: I want it to be dead simple to create a new client (and perhaps opening the possibility to signing up for yourself).

Difference between database and schema

由 江枫思渺然 提交于 2019-11-26 15:00:29
问题 What's the difference between a Database and a Schema in SQL Server? Both are the containers of tables and data. If a Schema is deleted, then are all the tables contained in that schema also deleted automatically or are they deleted when the Database is deleted? 回答1: A database is the main container, it contains the data and log files, and all the schemas within it. You always back up a database, it is a discrete unit on its own. Schemas are like folders within a database, and are mainly used

What mysql database tables and relationships would support a Q&A survey with conditional questions? [closed]

由 谁说胖子不能爱 提交于 2019-11-26 12:36:27
I'm working on a fairly simple survey system right now. The database schema is going to be simple: a Survey table, in a one-to-many relation with Question table, which is in a one-to-many relation with the Answer table and with the PossibleAnswers table. Recently the customer realised she wants the ability to show certain questions only to people who gave one particular answer to some previous question (eg. Do you buy cigarettes? would be followed by What's your favourite cigarette brand? , there's no point of asking the second question to a non-smoker). Now I started to wonder what would be

uncertainty in developing a database model

由 戏子无情 提交于 2019-11-26 11:39:07
问题 I\'m trying to develop a database model for candidate, their registered exams and result of the exams when its being taken. This is what I\'ve done so far. however im unsure if am on the right track especially from the examination table to the examination result table. how easy will it be to right write an insert sql code for examinationresult population for a particular candidate the examination types are categorised into science, art and social science. they all have 4 components each 来源：

Is it possible to specify the schema when connecting to postgres with JDBC?

由 痴心易碎 提交于 2019-11-26 10:12:56
Is it possible? Can i specify it on the connection URL? How to do that? Hiro2k I know this was answered already, but I just ran into the same issue trying to specify the schema to use for the liquibase command line. Update As of JDBC v 9.4 you can specify the url with the new currentSchema parameter like so: jdbc:postgresql://localhost:5432/mydatabase?currentSchema=myschema Appears based on an earlier patch: http://web.archive.org/web/20141025044151/http://postgresql.1045698.n5.nabble.com/Patch-to-allow-setting-schema-search-path-in-the-connectionURL-td2174512.html Which proposed url's like so

How do I show the schema of a table in a MySQL database?

由 大兔子大兔子 提交于 2019-11-26 10:06:54
问题 From the MySQL console, what command displays the schema of any given table? 回答1: describe [db_name.]table_name; for formatted output, or show create table [db_name.]table_name; for the SQL statement that can be used to create a table. 回答2: SHOW CREATE TABLE yourTable; or SHOW COLUMNS FROM yourTable; 回答3: You can also use shorthand for describe as desc for table description. desc [db_name.]table_name; or use db_name; desc table_name; You can also use explain for table description. explain [db

How to find column names for all tables in all databases in SQL Server

由 一笑奈何 提交于 2019-11-26 09:18:22
问题 I want to find all column names in all tables in all databases . Is there a query that can do that for me? The database is Microsoft SQL Server 2000. 回答1: Try this: select o.name,c.name from sys.columns c inner join sys.objects o on c.object_id=o.object_id order by o.name,c.column_id With resulting column names this would be: select o.name as [Table], c.name as [Column] from sys.columns c inner join sys.objects o on c.object_id=o.object_id --where c.name = 'column you want to find' order by o
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