I hope someone can give me some tips on how to implement a nice solution.
I need a table to store distances between 2 locations.
First thought was to make a table like this
- id
- fromid
- toid
- distance
However distances can be used in both directions.
So a search to get distance between xx and yy would be: select distance where (fromid = xx and toid = yy) or (fromid=yy and toid=xx)
A unique index (fromid, toid) would make sure no double entries are made, but this still doesn't deny anyone from changing from and to and entering a distance in the other direction (from yy to xx)
Any suggestions for a cleaner db design ?
Ideally one where searches don't need the or, or where the db design can restrict people from entering a distance in the other direction ?
I could force something in business logic to sort locations alphabetically but that also seems like a dirty trick..
I am trying to find all the email addresses with a " ._" I use '%._%' but it returns all records. What is the correct syntax? Also, is there a way to search for a field where the underscore is followed by a single alpha letter and then another underscore? like bla_A_bla or bla_Z_bla.thanksMilton SELECT DISTINCT fname, lname, inet FROM ocadbo.notes where inet like '%._%'
the application registers the student details to a course. each student gets a new registration no during registration.
the app should identify repeaters to a particular course by checking another table RegHistory, which stores the details of student registrations for the previous 5 years.
to determine whether a student is a repeater or not, we have to search for an exact match in RegHistory table (where the student name, guardian name and date of birth in both tables match with the corresponding entries in Registration table).
here is my question,
if there are 100,000 students registering in each academic year, we will have 500,000 records in RegHistory Table and 100,000 records in studReg table
if i start searching for a repeater, i guess i will have to loop through all records in studReg, for an exact match in RegHistory, which wil be a time consuming process.
is there any other options to search for repeaters ?
hi all, I need help in selecting records from a table based on the given search criteria. spec: select * from table where col1='x' and col2='y'... and col6='q' i may give any combination of column values. I mean I can't provide 6 values in 'where' condition all the time i submit query. help me with a stored proc which has 6 input parameters for the 6 columns.
I am searching for an add-in to ssms which lets me choose which server to deploy my code.
For example, I have a complete statement with CREATE PROCEDURE and all code in my query window.
Now I want to run/deploy this code to many servers at once. Instead of having to reconnect to all server (5), I want an add-in which have checkboxes for me to select.
Hi,I have come to point in my db design where I'm trying to figure whichis the best approach in making it generic (does this really matter?!?)Senario - I have a table called JOBS and this table contains fieldsuch as JobTitle, JobDescription, Salary etcI want to add to this table other attributes which are specific to acertain Job Industries.Solution - Add a join table for each type of industry containingattributes (db is now not generic) OR add a new table with a IndustryType field and a XML field containing the industry specificattributes.If I go the XML way will this just make it complex and slow to query?If not, what is the best way to query an XML field?Thanks,Jack
I am having a problem with seaching my tables. On my asp.net page ihave 3 text boxes. One for an ID and NAME and ADDRESS. I want to beable to search a table by using all or any combination of the 3 tosearch. But i cant get it right. i am using c# and sql server.any help ideas would be a great helpthanks in advanceructions
It is very intersting to find out that when we are backuping a database we are not able to specify a shared folder .Why?Is it because security concern or it is idenfied as bug or is there any work around.Only thing we are able to specify is that it points to the local drive of the particular server. Help would be more appericated.
Does anyone know where a good article pertaining to where you should locate your Data and Log files (in SQL Server 2005)? I read an article several years ago stating that Log files should be on a seperate RAID 1 and Data on a seperate RAID 5. Anyway, any help is appreciated.
I am getting this error when i run my aspx project..Server Error in '/' Application.
Incorrect syntax near '.'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near '.'.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[SqlException (0x80131904): Incorrect syntax near '.'.] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +857354 System.Data.SqlClient.Sql is there anyway that i can get the line number ,file or any other information regarding location off error.. i got abt 3 aspx files..so i dont really know where to look for the error..
I'm actually a beginner in SQL Server and I got use to a database called "Cache" where the Data itself is stored separately from the tables (Table definition), and I'm wondering if its the same in SQL Server where the Data is stored in a deferent location then the Table definition, and if so, where it could be stored?
Can someone tell me what the default installation location is for SQL 2000? Is it different for the default instance compared to a named instance? What about the tools? It seems to me I read something about the tools defaulting to the program filesmicrosoft SQL Server directory.
I guess I'm more concerned about each instance and the location of those files. I don't necessarily like the idea of each instance installing to the program files directory, if that's the default.
We have three separate disks for our sql server. Disk c : system Disk d : data Disk e : logs
A couple of months ago our IT manager moved the tempdb database from the c drive to the d and e drives because it had grown to 9Gb and the c drive had run out of space. When I discovered this, I shrank tempdb back to it's specified size of 1.9Gb and now I want to move it back to the c drive because I believe we will see better performance with the system + tempdb together than with the data/logs + tempdb together. Am I correct?
A couple of notes. Server is used exclusively by SQL server. We have three large databases (40Gb, 20Gb, 15Gb), three databases around 4Gb databases and around 15 smaller databases. Most of them are accessed exclusively from a web application.
Easy question, I hope We are setting up an active active sql cluster. The management have done everything the wrong way around and purchased the hardware already.
We are planning on having 2 databases 1 in each instance. We will place the transaction log files for each database on their own cluster "physical disk" resource. We only have 4 disks availalbe for the transaction log files. To make things a little more complicated I have been given no information on the expected transaction use other than they should be no larger than 50GB
Here are my options
1. 2 Mirrored raid arrays one for each sql instance 2. 1 Raid 10 array with 2 logical drives (so the transaction logs are sharing the same disk spindles)
What would you do? seperate the disk spindles or share them and go for fast disk performace.
Hi again,I am able to schedule a backup and default it to the server. However, isthere an option or a way to locate the backup somewhere else on the network?regards,gilbert
I have an installation of SQL2005 SP1 configured as follows:
Dell Poweredge 2650 with 4 GB RAM c:, d: and e: are all on the local host and f: and g: drives are on a SAN. I have the system db's on the e: local disk and the Team Foundation Server databases and logfiles on the SAN disks. SQL2005 is installed to the E: disk.
We are migrating VSS to TFS and our times are very long for a simple 1 GB migration.
I need to know if I need the application databases and logfiles and system databases on the same disk because I see a lot of disk thrash and the tempdb is getting large, 3 GB today.
SQL architecture - should the system db's be on the same disk as the application db's?
When the battery dies the SQL Ce installation vanishes. Especially the following dlls which were copied into the Windows directory during installation are getting vanished when the battery dies.
I guess this is because of the fact that RAM content vanishes when the power goes off.
Is there a way i could install the SQL CE in the Storage Card?
I can install the Compact Framework in the Storage Card but not the SQL CE.
I have installed the CF, My application in the Storage Card. Just because of this SQL CE does not allow me to choose the installation directory, i have to install the SQL CE everytime the battery dies out.
How do you know what exactly to use as the database name?
In school the prof says he is not exactly a database programmer but gave us some code he had from an old one. That code worked fine if you want to actually connect to the database at school but I want to send everything right through sqlexpress on my own machine so I can work on the programs at home.
The following is the code to connect to the school database, how would I change it to connect through sqlexpress instead?
Code Snippet
using System;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace Database
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public class Class1
{
SqlConnection connection;
public Class1()
{
}//closes constructor
public void connect(string computerID)
{
connection = new SqlConnection("Data Source = " + computerID +
1. If you are managing databases in SQL Express with SQL Server Managment Express CTP, why doesnt VBE place the database there where you can see them? I can create a database inside SQL Server Managment Express CTP and view its tables, relations,etc. from within SQL Server Managment Express CTP, but when I make a database with VBE it does not show up in SQL Server Managment Express CTP. Also the database that was made inside SQL Server Managment Express CTP cannot be seen from VBE. Why? what did I do wrong, or is it supposed to be like that? Is that where you would want to place a database for multiple pc to share?
2.Login Question ;-----shouldnt post this here but,
Is there a reason why you dont want to use SQL Authetication over Windows? The are a few pcs here that doesnt have user accounts installed(I know that not a good practice, but when you have multiple people needing different data quickly- switching users is not preferred, its a time thing for what I would call dummy terminals).
How do you take an instance of SQL and change to SQL Authetication over windows?
hi frends I am working on project in which we have to show advertisements as per users country. how i can know about the location of user that just type the url and press enter. any body have any solution or tips most welcome Thanks Sarbjit
All €œsystem databases€? + €œreportserver & reportservertempdb€? are on €œ D drive€? --- Raid 1 ( Mirrored) and their location is : D:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLData
Free Space left on "D" Drive is # 18 Gb.
€œUser Databases€? are on ---- €œE Drive€? --- Raid 5 and their location is E:Datadb
Now , we got new storage device with much larger capacity. So, we are planning to transfer our databases on this new drive which is €œRAID 5€?.
My question is:
(1) Should I transfer all the databases ( (i.e.) €œsystem databases€?+ €œreportserver & ReportServerTempdb€? + €œUser databases€?) on that new drive ( RAID 5). (OR)
(2) Keep the €œsystem databases€? + €œReportServer& ReportServerTempdb€? on the old drive (i.e.) RAID 1 and Transfer only the €œUSER Databases€? on that new drive (i.e.) RAID 5. (OR)
(3) Transter only Tempdb to the new drive (i.e.) on Raid 5, so as to avoid any I/O congestion. and keep all other system & ReportServer & ReportServerTempdb on the old "D"drive. (OR)
(4) Is there anything I should be careful when doing this & Is there any better way of doing this€¦.
i'm making a web page for a clinic.it needs to be able to search for patients by first name, surname, date of birth and patient number.i'm using visual web developer and i have my database, my data source and GridView grid.i want 4 text boxes for my first name, surname etc. when u click enter on any of them i want to retrieve all their data and display it in the gridview.at the moment i have one text box on the web page and through the "Configure data source" option on the grid view i can retrieve the specified data but for only this one item, e.g. SELECT * FROM [Patients] WHERE ([DOB] = @DOB). if i add another text box to my web page, and don't do anything to it, the query wont run. if i add and "AND" statement to the query, e.g. SELECT * FROM [Patients] WHERE (([DOB] = @DOB) AND ([FirstName] = @FirstName)), again it won'r run or return and data. any ideas on what i can do or where i'm going wrong. thanks
