Basic Concept Clarification
Oct 2, 2007The distinction between Entity and Relationship is obvious to me. But I am confused by Table. Table describes Entity, Relationship, or both?
Thanks for any input.
The distinction between Entity and Relationship is obvious to me. But I am confused by Table. Table describes Entity, Relationship, or both?
Thanks for any input.
Hi Friends,
Can anybody help in introducing the YTD Concept:
My Table[ Monthly_Highlights_tb ] schema should contain like below:
[Month] [Base_Amount] [YTD]
APR-07 1000.00 1500.00
APR-07 500.00 1500.00
MAY-07 2000.00 3500.00
jUN-07 5000.00 8500.00
WHEN I run the below query:
UPDATE t
SET t.ytd = (SELECT SUM(q.base_amount) FROM Monthly_Highlights_tb q WHERE q.[month] = t.[month] AND q.[month] <= t.[month])
FROM Monthly_Highlights_tb t
output is coming as:
[Month] [Base_Amount] [YTD]
APR-07 1000.00 1500.00
APR-07 500.00 1500.00
MAY-07 2000.00 2000.00
jUN-07 5000.00 5000.00
cAN anybody correct the query?
What are some strategies in categorizing items?
View 4 Replies View RelatedHi all,
Please let me know the details of the following.
1.What is Multi-Threading?
2. How it is useful to increase the Performance of a SQL query.( How it is useful
in Optimizing the query.
3. How we'll use MultiThread concept in Partitions and Using Processors.( For Eg.. If I want to use MAX threads=14 and 16 processors in this situation how we use PArtition concept and how it will improve the bufffer size of the CPU)
Thanks in advance
Before going in to details i like to understand more about concept anddesign of this database. Most books go directly in to details.Please, can a current admistrator gife me information on this?Thanks in advance,Dick vd Spek email: Join Bytes!
View 1 Replies View RelatedHi friends,
How r u?..i have one clarification..Curently, i am doing one search engine stuff...for that, i have to populate data from sql server database to flat file..i got java script search engine code from one web-site,in that code,data's are fetching from flat-file only..so i have populate the data from sql server to flat-file, and then get the key-word value from that flat-file according to the user input..Is it possible?..send mail..
Bye from
Jan Reddy
I just finished getting a local database mirrored to an offsite "DR" server. Interesting experience getting that working, but that's another story! It's set up as "High Safety without automatic failover (synchronous) (without a witness). I was hoping I could get a sanity check in this flow....
Local database gets updated each morning with a few meg of data, so it's pretty low use. It's mirrored through a T1 (soon to be dual). My remove copy was restored from yesterday€™s backup, and the mirror was sync'd in less than 10 minutes, so I don't expect bandwidth to be an issue...
In the event that my local server or network is down, I'd be able to log into my remote server, and run my application remotely. From what I've seen, the "Failover" option is only available on the "Primary" server? Will this become an option if the remote no longer sees the primary, or do I need to do this through the command: ALTER DATABASE <dbname> SET PARTNER FORCE_SERVICE_ALLOW_DATA_LOSS?
Since the updates are so limited, I'm not too concerned with data loss, but will need to make sure I can get this running quickly if needed...
As I understand it, this will put the mirrored database as the primary, and when the old primary comes back only, it'll become the new mirror? I can then let them sync, and force a failover from the remote system to put the primary back to the local network.
I just want to make sure I understand this correctly before I start testing. Thanks for any assistance!
Steve
Hi all,
What is the equivalent for Oracle's nested table concept in SQL Server ?
Is there anything like TABLE( ) function to select from nested table as in Oracle ?
Eg in Oracle :
SELECT t.* FROM TABLE(nested_table_datatype) t;
( like the above query used in Oracle PL/SQL and 'nested_table_datatype' is a table datatype created in Oracle using 'create type ...' syntax )
Please give the equivalent for above...
Thanks,
Sam
what is the concept of smart backup in sql ?
View 1 Replies View Relatedi would like to know where can i find information on the concept of SQL like Base Table , View Table and Search Table as now i am using VS.Net 2005 and SQL Server 2005 to write a addressbook program and i am just a newbie to Sql and c#... i wish to write my sql commands in c# side before passing it into sql and may i know how to do it?
View 20 Replies View RelatedI want to create a DataList that shows products, which will be on
multiple pages. I have my stored proc to show paged results, which
contains a return value for more records.
I have found examples of coding the DataReader, defining all the
parameters etc, but what about the drag and drop SqlDataSource?? You
can select the DataSource Mode to be "DataReader". I can put select
parameters in, with input and my return value. I don't know how to then
access the return value, or output value if needed, from this? My
DataList references the SqlDataSource, but I don't know how to get the
return/output value out??? This is very frustrating, cause I can't find
any info about it anywhere. Always input parameters, but no output.
This is my current SqlDataSource...
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
DataSourceMode="DataReader" ConnectionString="<%$
ConnectionStrings:Personal %>" SelectCommand="sp_PagedItems"
SelectCommandType="StoredProcedure">
<SelectParameters>
<asp:QueryStringParameter Name="Page" QueryStringField="page" />
<asp:Parameter Name="RecsPerPage" DefaultValue="10" />
<asp:QueryStringParameter Name="CategoryID" QueryStringField="cat"
/>
<asp:Parameter Name="RETURN_VALUE" Direction="ReturnValue" Size="1"
/>
</SelectParameters>
</asp:SqlDataSource>
If I take out the RETURN_VALUE Parameter, my results display in my data
list, but that's useless if I can't access the return value to
determine the remaining number of pages etc. Is my RETURN_VALUE
parameter wrong? How do I access that? My stored proc is shown below...
CREATE PROCEDURE sp_PagedItems
(
@Page int,
@RecsPerPage int,
@CategoryID int
)
AS
-- We don't want to return the # of rows inserted
-- into our temporary table, so turn NOCOUNT ON
SET NOCOUNT ON
--Create a temporary table
CREATE TABLE #TempItems
(
ID int IDENTITY,
No varchar(100),
Name varchar(100),
SDescription varchar(500),
Size varchar(10),
ImageURL varchar(100)
)
-- Insert the rows from tblItems into the temp. table
INSERT INTO #TempItems (No, Name, SDescription, Size, ImageURL)
SELECT No, Name, SDescription, Size, ImageURL FROM Products WHERE CategoryID=@CategoryID
-- Find out the first and last record we want
DECLARE @FirstRec int, @LastRec int
SELECT @FirstRec = (@Page - 1) * @RecsPerPage
SELECT @LastRec = (@Page * @RecsPerPage + 1)
-- Now, return the set of paged records, plus, an indiciation of we
-- have more records or not!
SELECT *,
MoreRecords =
(
SELECT COUNT(*)
FROM #TempItems TI
WHERE TI.ID >= @LastRec
)
FROM #TempItems
WHERE ID > @FirstRec AND ID < @LastRec
-- Turn NOCOUNT back OFF
SET NOCOUNT OFF
mine is a small organisation and we have deployed an ERP on windows 2003 server. their are total 60 ERP users and we have 25 concurrent licences for ERP.
at the backend we are running MS SQL 2000 standard edition. we have created one user in Database and ERP accesses data through this user only.
now i need to understand how many CAL for database i need to purchase. either 60 or 25 or 1.
thanks
I hope someone can help here. I found that I was having replication failing due to the fact that there is a foreign key being referrenced, here is the error:
Could not drop object 'dbo.tblName' because it is referenced by a FOREIGN KEY constraint.
(Source: Database Name (Data source); Error number: 3726)
In searching for some sort of answer - I came across this:
Join Filters
Foreign key relationships are central to most database designs. For example, in a database that tracks product orders, you often see a CUSTOMER table with a CustID primary key and an ORDER table with a CustID foreign key that references the CUSTOMER table. In merge replication, if you filter the CUSTOMER table with a subset filter clause, you must also filter the ORDER table, so that only the rows that reference the filtered subset of rows from the CUSTOMER table are replicated. Filtering requirements that are based on a foreign key relationship must be explicitly represented in the merge replication configuration through a join filter (which lists the two related table articles and a logical expression that identifies the relationship), as shown in the following example:CUSTOMER.CustID = ORDER.CustIDThe effect of this join filter between the CUSTOMER table and the ORDER table, together with the subset filter
clause on the CUSTOMER table, is that Subscribers to the publication receive only those rows from the CUSTOMER
table where State = 'WA' and only those rows from the ORDER table that correspond to the CustID
values in the filtered CUSTOMER table.
________________________________________________________________________
Am I reading this right? If I have only one table that I need to replicate, I would need to included the other tables connected by
the foreign key for the replication to work, and in doing so - the table I designate for updating in this replication will be the only
one affected and the others that have go with this - won't update their corresponding dupe tables? Sorry - I hope this makes sense.
I have a question , because I€™m not very experienced with VB.
The function declares
Public myString
Public myKey
When something is declared this way, what happens if two or more users happen to execute the report at the same time? Is myString and myKey public to all of those reports at the same time, or does the Report Server manage those variables separately for each of the reports running concurrently?
Any clarification on this......................?
thanks
The below code is ASP 1.0 to dynamically search a database and I want to use the same concept for a ASP.Net 2.0 solution. Do I do this in the code behind or on the aspx page and if on the aspx page what controls do I use for the array split? Basically where do I start. It took me a long time to get this old code working, I am hoping it is simpler in 2.0.
Thank you
OLD ASP 1.0 code to dynamically build a Sql Select statement for searching a database using one or more search words entered by user.
If Request.Querystring("kwdSearch") <> "" ThenDim kwdString, ArrKwdString, iCountiCount = 0 kwdString = Replace(Request.Querystring("kwdSearch"), "'", "''")ArrKwdString = Trim(kwdString)ArrKwdString = Split(kwdString, " ",-1,1) For iCount = 0 to UBound(ArrKwdString) If iCount < UBound(ArrKwdString) Then Criteria = Criteria & "tblLinkInfo.L_Keywords LIKE '%" & ArrKwdString(iCount) & "%' AND " Else Criteria = Criteria & "tblLinkInfo.L_Keywords LIKE '%" & ArrKwdString(iCount) & "%' " End ifNext RS.Open "SELECT * FROM tblLinkInfo Where (" & Criteria & ") AND L_Enabled = 1 ORDER BY " & SortBy & "L_Rank", CNN, 3 If RS.EOF Then If Rs.State Then RS.Close RS.Open "SELECT * FROM tblLinkInfo WHERE L_Description LIKE '%" & Replace(Request.Querystring("kwdSearch"),"''","'") & "%' AND L_Enabled = 1 ORDER BY " & SortBy & "L_Rank", CNN, 3 End If
RESULTS --- Display results with Repeater1.DataBind(); etc
Exit SubEnd If
Hi
I am involved in a product development and want to understand the current best practices from the conception to product rollout. I have few questions. Appreciate your help and suggestions
Our project in a nutshell: Our team has developed the apps. using GUI-Oracle Forms & DBMS-Oracle 8i/9i with weblogic, Corba, windows 2000 server environment. It’s meant for 1000s of users with million of data. We are trying to integrate additional services/capability - messaging (wireless, chat etc.). As per the initial plan we have a central database and users will be using a local footprint database. The deltas (the changes) will be synchronized with the central database at a frequency say daily or nightly... We are concerned that having the database at the users desktop could leave the door wide-open for others to take a look at our code/design...
Questions:
1. UML case tools-- What’s the best tool available in the market as we want to revisit the design phase and identify the things that have been missed out in the prototype-(which was developed by a third-party)?
So far we have used ERWIN to extract the data model...
2. How can we eliminate the need to have a local footprint database at the users desktop.?. Since there is a lots of data, retrieving the data via internet could be very slow for users? (hope this is the case!) That’s what led our team to think of having a local database at the users desktop. Someone suggested to use the data files or caching the data.. Appreciate if anyone shed some light on this.. Is there a better way to do it?
3. Client connectivity: What are the softwares needed at the users PC. Since we use Oracle Forms to develop the application, do we need to install the oracle clients at the users PCs? how to establish the connectivity from the Users PC to our server and to the database. IF we have to use the oracle client, does that require licenses for every User? What do we need to consider from the network connectivity stand point.
4. Application Rollout: how to package our finished product - application exe that is installable across wide array of environment. (we thought of install shield). how do we test it for accuracy etc.,
5. Database optimization: In addition to DBA help, is there any product or proceedures to ensure dataModel optimization, SQL query performance etc.,
Appreciate you sharing your valuable thoughts on this with us..
My goal is to populate a dropdownlist with only with users that are "Techs". I am using the membership database that you ccan set up through VWD. I added this column to the aspnet_Users table: IsTech as bit datatype. I thought I had the right SQL statement but apparently not, because I get an Invalid column name 'True'.Here is my statement: <asp:SqlDataSource ID="SqlDataSource3" runat="server" ConnectionString="<%$ ConnectionStrings:HRIServiceConnectionString1 %>" SelectCommand="SELECT [UserID], [FirstName]+ ' ' + [LastName] AS techid FROM [aspnet_Users] WHERE [isTech] = True ORDER BY [LastName], [FirstName]"> </asp:SqlDataSource>
View 9 Replies View Relatedhttp://www.microsoft.com/sql/editions/compact/sscecomparison.mspx
The above link says the pros and cons of two SQL Server 2005 editions.
Document says Compact Edition is not good for €˜When you need a multi-user database server
€™.
What is the meaning of multi-user database?
Does this means the database strictly will not support two database connections at a time?
-Thank you,
Gish
Can come one help me how to disable an index using select query.
Hi,
I am working on a SQL Server database that will be accessed (mainly) via a web interface that will have users from various countries. As I understand it, the best way to store data is to use 'n' (nvarchar etc) datatypes for columns, which allow users to enter data and it will be stored in the raw Unicode format. For other reasons the collation of the db has been changed (to Slovenian) but I understand that this will only affect how data is sorted. However, whenever I try to put certain data into the nvarchar field (Such as the £ symbol) the data get transferred to a letter L. Is that how it would be expected to work and if so am I missing something here - note I Know ent manager sometimes shows data incorrectly, but this happens when I add/view data from anywhere (i.e. end manager/ the website/ query analyser).
Any clarification would be much appreciated.
Kenny
Hi,
I'm seeing confusing results coming back from a query and I want to make sure my joins are working as expected.
I have 3 tables, tbl_family, tbl_familyPhone, and tbl_phone. tbl_FamilyPhone is a linking table between families and phones that specifies if it's the primary number.
tbl_Family tbl_FamilyPhone tbl_Phone
--------------- ------------------------- ----------------
pk_FamilyID pk_FamilyPhoneID pk_phoneID
fName fk_FamilyID fk_TypeID
lName fk_PhoneID ...
... ...
So a family has many familyPhones and a phone has many family phones. I'm trying to get all the families and their home phone only, if they have one. I don't want families to duplicate and I don't want any left out. Here's what I've got
Code Snippet
select [whatever]
from tbl_family
LEFT OUTER JOIN tbl_familyphone on tbl_family.pk_familyid = tbl_Familyphone.fk_familyid
inner JOIN tbl_phone on tbl_familyphone.fk_phoneID = tbl_phone.pk_phoneid and tbl_phone.fk_phonetypeid = 'E6F1688E-015B-481D-8C41-DCC1FEA5D5AB'
My thinking is the inner join between tbl_Phone and tbl_FamilyPhone will cause any FamilyPhone record without a phone record to be left out (fk_phonetypeid is the id of a home phone). Though some FamilyPhone records may be left out, I will not lose any families because it is left outer joined to familyphone. Is this right? Because if I just do select count(*) from families I get 4517 records, but when running the query above with the joins, I get 4383 records.
Does the Table Lock option in the OLE DB Destination task in a data flow refer to a lock on the destination table or on the source table from which the table is loading from?
The reason I ask is because I have a package run twice simultaneously pulling from the same server and table onto two different tables on two different servers. When I kick off my job to run the two data pulls, one of the jobs terminates with a
"TCP Provider: An existing connection was forcibly closed by the remote host." message. I believe this is due to a table lock on the server, but can't figure this out.
Thanks in advance for your help.
My environment looks like:
- Windows 2008R2 SP2 VM (VMware 6)
- SQL 2012 SP2 Std.
- NetApp iSCSI LUNs, Snapmanager for SQL
So I have created a test database and configured the logs to grow to max. 120MB in size.
To check the allocated and free space I right-clicked the database -> tasks -> shrink file
I see currently allocated: 5,00MB and 2,50MB free space for the MDF Database
I see currently allocated: 1,00MB and 0,63MB free space for the LDF Logfile
Next I use a data generator to fill the database with random data.
After adding around 500k rows I check the size again:
I see currently allocated: 17,00MB and 0,44MB free space for the MDF Database
I see currently allocated: 61,94MB and 0,27MB free space for the LDF Logfile
Next I take a full backup incl. truncating log files. After that I check the size again:
I see currently allocated:Â 17,00MB and 0,44MB free space for the MDF Database
I see currently allocated: 61,94MB and 57,24MB free space for the LDF Logfile
So now my question is where are those 56,97MB? I imagined they should now be added to the MDF file but they seem to be just gone. I did this procedure 2x more time and the MDF stays the same size while the LDF is almost empty after backups. Then I thought maybe its in the memory of the server so I rebooted it. But still the MDF has the same size... Is this normal? How it should work?
I tried samples of FileTable in SQL Server 2012 to store files in database. I have following questions.
1. When I right click on FileTable, and say Explore File Table Directory, I was taken to a directory. But if I search the same directory in my server/machine, the directory is not available.
2. Can I use some external server/disk as a directory for FileTable?
3. How easy is to use FileTables using .Net web applications?
From BOL, I see these remarks with respect to the MODIFY FILE subcommand (my underline added):
Initializing Files
By default, data and log files are initialized by filling the files with zeros when you perform one of the following operations:
Create a database
Add files to an existing database
Increase the size of an existing file
Restore a database or filegroup
Which leads me to believe that expanding the size of a datafile will also wipe out (my definition of 'initialize') any existing data within that file.
I may be misunderstanding 'initialize', because when I tested it out, I found this wasn't the case - my table data written to the file was still there after a resize.
Need to clarify to what degree I'd be taking a risk by increasing the file size on a datafile which already has data in it.
We're upgrading our SQL Server database from 2005 to 2012.I ran the Upgrade Advisory report and got this issue "Non-integer constants are not allowed in the ORDER BY clause in 90" because of the script below
SELECT
gp.BRAND+' <> '+gp.CATEGORY AS 'full name',
gp.PRODCODE,
gp.CATEGORY
FROM dbo.GFK_PRODUCT gp
ORDER BY
'full name'
I tried running the same query in our test SQL Server 2012 and it ran successfully. Now I'm confuse if i still need to change it.I google the issue a bit and came across this link and mentioned this.
1.) Non-integer constants are ... constants that are not integer number.
Example:Â 'string1'Â represents
a string constant
0x01Â represents
a varbinary constant
{ts
'2015-02-26 06:00:00'}Â represents a datetime constant
1.23Â represents
a numeric constants
2) So single quotes are used to define a string constants / character string constants but SQL Server allows also to use single quotation marks use also as column identifier
delimiter:
SELECT ... expression AS 'Column1'
FROM ...
In this context is clear that 'Column1' is a column identifier but when used in ORDER BY : ORDER BY 'Column1' it generates confusion because SQL Server doesn't knows if it represents a string literal (character string constant) or it represents a column identifier / column name."Do I still need to change the existing code even though it's working fine in 2012? If yes, it is because of best practice reason or it will total get deprecated/not working in the future version?
In SQL Server 2000, when i install a client connection only, it also install the enterprise manager, just by adding/register new SQL server. there you can access all the tables. but in SQL Server 2005 how can I achieve that? Coz when i only install the client tool for SQL Server 2005 it only enables to connect to database, not accessing it freely and sql server management studio not included.
please help..
This is probably a very silly question.I started learning ASP.net by following ASP.NET Unleashed. I am stuck where he wants me to open a connection to SQL Server database. I have just downloaded
MSDE. But I dont know where to type this code and how to run it..so as to connect to the database.
<%@ Import Namespace="System.Data.SqlClient" %>
<Script Runat="Server">
Sub Page_Load
Dim conPubs As SqlConnection
conPubs = New SqlConnection( "server=localhost;uid=webuser;pwd=secret;database=pubs" )
conPubs.Open()
End Sub
</Script>
Connection Opened!
Now do i have to change the uid to SA ? (i had to assign one when i downloaded and installed MSDE?
Thanks for the help.
Hi all,
am not very experienced in using DTS and really need your help. I have a dts package that i have scheduled to run every day. Here's what i want the package to do:
1. Check whether a value for a certain column in a certain row of a table in my database is 0 or 1. If it is 1, then
2. Run the dts task (which i have created and is working)
In other words, when the package is started, i want to execute a stored procedure or sql task or whatever, and if that returns 1 then i want to continue, if it returns 0 i want to finish the package without running the dts task. I'm sure there's a simple way to do this, but i could use your help...!
Thanks,
Elisabet
Hi All,
Can this be done and if so can you give a bullet list of the steps need to accomplish this.
I need to load a bunch of files into a stagging table. Need to loop through the files and load them.
Thanks,
Michael
Hi,
what this statement do?
does it add all the values or combine all the values.
REPLACE combine WITH lc_tran + lc_exp + lc_war + ll_boc
Regards
kk
I downloaded SQLExpress and Visual Studio Express to my home computer.
I built a simple database, adding data through theSQLexpress admin tool.
I built a web page using MS Studio. I connected to the database and used the webpage for a few days. Then I restarted the computer. Now the web page won't open, and MS Studio won't open the MDF file in the App_Data folder.
I can still see and work in the database through SQL server Express.
The web page and the MSStudio attempt to connect to the mdf file both fail with this message:
Cannot open user default database. Login failed.Login failed for user 'KAAAK/Administrator'.
So it seems to be trying to connect as the Windows user.
When I try to modify the connection to connect through a user/password I created in SQL manager, I get a message that the user is not a trusted SQL user.
from web.config:
<connectionStrings>
<add name="ConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|info.mdf;Integrated Security=True;User Instance=True;User ID=Admin;Password=12345" providerName="System.Data.SqlClient"/>
</connectionStrings>
That was changed from the original string created automatically by MS Studio
<connectionStrings>
<add name="stocksConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|stocks.mdf;Integrated Security=True;User Instance=True;" providerName="System.Data.SqlClient"/>
</connectionStrings>
I am sure this is some simple problem, but why would the system refuse to access an mdf file it had already been accessing.?
Thanks, Michael
Hi all, having trouble with my first sql communication. I've got hosted service with an SQL database i've populated with a row.
When it gets to the third line the page crashes with an error.
SqlConnection connection = new SqlConnection("Server=mydbserver.com;Database=db198704784;");// +"Integrated Security=True"); SqlCommand cmd = new SqlCommand("SELECT UserName FROM Users",connection); SqlDataReader reader = cmd.ExecuteReader();
is there somewhere i need to put in my username or password? or is this code just wrong
Many thanks burnside.
-- Edited by longhorn2005