sql-server-ce

问题 I used to open sdf (sqlCE) files with visual-studio? or sql-server? I really don't remember. Now I can't open this sdf file. With what program do I need to open it? 回答1: It's a SQL Compact database. You need to define what you mean by "Open". You can open it via code with the SqlCeConnection so you can write your own tool/app to access it. Visual Studio can also open the files directly if was created with the right version of SQL Compact. There are also some third-party tools for manipulating

问题 I've asked few people why using xml as a parameter in stored procedure doesn't work and everyone said , that's just the way it is. I can't belive that. command.Parameters.Add("@xmldoc", SqlDbType.Xml); That's where compiler returns error and I can't use NVarChar beacouse it's limiteed to 4k sings. XML would be perfect as it can be 2gigs big. How come other SqlDbTypes work well and this one retruns error ? * Error: Specified argument was out of the range of valid values. Parameter name:

问题 i wonder if there is something similar to Sql Profiler for Sql Server Compact Edition? i use SqlCE as backend for a desktop application and it would be really great to have something like sql profiler for this embedded database. or at least something simliar to the NHibernate show_sql feature... any ideas? thanks j. 回答1: The only tested solution I know of that could solve this problem is Altiris Profiler which is a tool I designed at my previous job, but is closed source and not-for-sale. The

问题 I have this sql: UPDATE JOBMAKE SET WIP_STATUS='10sched1' WHERE JBT_TYPE IN (SELECT JBT_TYPE FROM JOBVISIT WHERE JVST_ID = 21) AND JOB_NUMBER IN (SELECT JOB_NUMBER FROM JOBVISIT WHERE JVST_ID = 21) It works until I turn it into a parameterised query: UPDATE JOBMAKE SET WIP_STATUS='10sched1' WHERE JBT_TYPE IN (SELECT JBT_TYPE FROM JOBVISIT WHERE JVST_ID = @jvst_id) AND JOB_NUMBER IN (SELECT JOB_NUMBER FROM JOBVISIT WHERE JVST_ID = @jvst_id) Duplicated parameter names are not allowed. [

问题 I'm writing a program that requires the user to select the active database at application startup. I have a Windows Form that will list the databases stored in a sub-folder of ApplicationData specifically for storing the database files. When I create a new database, however, I need to copy the the template database, but can't figure out where it's stored by default. I've tried: dpath = ConfigurationManager.AppSettings["DataDirectory"]; I always seem to get a null value in return though. At

问题 I'm writing a small application for college, a video rental application. I have no problems reading from the database, but I cannot update the data in the tables. In particular I'm looking to update the cell showing the quantity of a film in stock after someone rents a movie. So far I've been trying this: string updateDVDs = "UPDATE Products SET dvd_quantity = " + product.Quantity + " WHERE title = '"+ product.Name +"';"; cmdUpdateDVDs = new SqlCeCommand(updateDVDs, dBConnection);

问题 in the past hour i have been trying different variants of this query but i get error at the username , and the username is just a normal string with username that i get from xml file containing no special characters or whatsoever I'm using SLQ compact 3.5 P.S i tried to use ? instead of @username also not working all feilds are "nchar" except "date" C = nodeItem["user_from"].InnerText; avatar = nodeItem["user_from_avatar"].InnerText; string msgText = nodeItem["message"].InnerText; DateTime dt

问题 Is there some SQL that will either return a list of table names or (to cut to the chase) that would return a boolean as to whether a tablename with a certain pattern exists? Specifically, I need to know if there is a table in the database named INV[Bla] such as INVclay , INVcherri , INVkelvin , INVmorgan , INVgrandFunk , INVgobbledygook , INV2468WhoDoWeAppreciate , etc. (the INV part is what I'm looking for; the remainder of the table name could be almost anything). IOW, can "wildcards" be

问题 I'm using SQL Server CE as my database with asp.net. I'm querying the database as follows. SELECT DispatcherName, ActivityType, COUNT(ActivityType) AS Total FROM Activity WHERE (BeginTime >= '4/5/2011 12:00:00 AM') AND (EndTime <= '7/13/2011 12:00:00 AM') GROUP BY DispatcherName, ActivityType ORDER BY Total DESC I'm getting the result as follows: N/A VOX 311 Olson State Change 37 Fred State Change 26 Dave PTT 25 George PTT 25 Olson PTT 23 Dave State Change 22 Jason PTT 22 George State Change

问题 Does the silverlight clr support access to a sql compact database placed in the silverlight application's isolated storage? If so, any pointers to code samples. I would like to cache information retrieved from the server in previous sessions. 回答1: Even if it was stored in Isolated Storage, there is no Silverlight library to read in SQL Server Compact Edition. Perhaps in a future version. I have heard of a couple of open source projects that are trying to do this but there are not any that