DB/Reporting :: Optimize Query (aggregates On Multiple Tables)?
Feb 20, 2008
Code:
Tables:
- Company
- Department
- Employee
- CertificationA
- CertificationB
I am trying to return a recordset that gives some summary information about each company. The fields in my returned recordset should look like the following.
Company.Name, NumberOfDepartments, NumberOfEmployees, NumberOfCertificationA, NumberOfCertificationACompleted, NumberOfCertificationB, NumberOfCertificationBCompleted
There are actually about 10 different Certification tables but, with Certification A and B you should get the hang of it. When an employee starts a certifaction, a record is added to the that certification table.Below is a query I wrote that works (gets me the data I need), but I am unsure if it is the most efficient way. There will be quite a lot of data so performance is an issue.
Code:
Dim sqlNumberOfDepartments As String
sqlNumberOfDepartments = _
"(SELECT COUNT(*) " & _
"FROM DEPARTMENT " & _
[code].....
View 1 Replies
ADVERTISEMENT
Jul 26, 2010
My LINQ query contains the following Group By statement:
Group p By Key = New With { _
.Latitude = p.Address.GeoLocations.FirstOrDefault(Function(g) New String() {"ADDRESS", "POINT"}.Contains(g.Granularity)).Latitude, _
.Longitude = p.Address.GeoLocations.FirstOrDefault(Function(g) New String() {"ADDRESS", "POINT"}.Contains(g.Granularity)).Longitude}
The query works, but here is the SQL that the clause above produces
SELECT [t6].[Latitude]
FROM (
SELECT TOP (1) [t5].[Latitude]
[Code]....
but this produced an error: "A group by expression can only contain non-constant scalars that are comparable by the server."
View 1 Replies
Nov 15, 2008
I have a simple "two-tables" database (SQL EXpress) and a very simple application (VB 2008 Express). The two tables are customer and order and their structures are:
customer(IDcustomer, LastName, FirstName) IDcustomer=primary key orders(IDord, Number, Description, IDcust)
IDord=primary key the tables are related (IDcustomer-->ID cust)
In VB2008 environment I create a dataset, by means of Data Source Configuration Wizard, which encompass both customer and order tables (xsd file). By opening xsd file I set the relationship in the following manner:
"Both relation and foreign key constraint"
Update Rule = Cascade
Delete Rule = Cascade
In my form I show customer table in detail-mode and orders table in datagridview-mode. Two Fill method are created in the Load event and they work correctly.In "CustomerTableAdapter" I create, with QueryBuilder, a search query (say LastName query) and I write the following code:
Private Sub frmSearch_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.CustomerTableAdapter.FillByLastName(Me.CustomerOrdersDataSet.custom er, "D") 'All Lastnames with first letter = D
[Code]...
View 1 Replies
Feb 6, 2009
I need to write and SQL query that three from three linked tables. Basically there is a 'case_id' column in each table with matching values.
What I have is:
Code:
declare @archiveYears int
set @archiveYears = -7
delete from cw_ht_bacase where case_id in (
[Code]....
As you can see I have the same query in the "in" clause for each statement. Is there a way to normalise this, sort of like C macro. Basically I'd just to define the inner select statement once and use it multiple times.
View 5 Replies
Dec 13, 2009
I have a 4 table database and need to query at least 2 tables (the single table query works fine). The output goes in textboxes / labels on an existing form.
I'm trying something like this:
Private
Sub AddCustomer_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
View 12 Replies
Dec 21, 2011
How to Query multiple tables in a dataset to form single consolidated table without using any external database. I know this can be done using 'JOIN' in SQl.
Now my condition is I have multiple tables filled with data in a dataset and each table is interrelated with a common 'column'. For example ,
Table 1
ID
Name
1
[Code].....
Here I mentioned only two tables but in my case there are many tables. I need a generic answer for this dynamic query .
View 8 Replies
Dec 7, 2010
I have a VB .Net linq query that I want to return values from two tables. I currently have this:
Dim query = (From c In db.Client _
Join u In db.Users _
On u.UserID Equals c.UserID _
Where (c.ClientID = 1)
Select c, u).ToList
query (System.Collections.Generic.List(Of )) returns several rows as expected each item containing a c and a u.
How do I iterate through the queries collection?
View 1 Replies
May 20, 2010
I'm working on building an HTTPHandler that will serve up plain text for use with jQuery Autocomplete. I have it working now except for when I insert the first bit of text it does not take me to the right portion of the alphabet.[code]...
My question is, how would I implement this concept into my HTTPHandler without doing a fresh SQLQuery on every character change? IE: I do the SQL Query on the QueryString("ID"), and then on every subsequent load of the same ID, we just filter down the "Part".[url]...
View 2 Replies
Jul 23, 2011
I want to select to multiple sql tables using select query in vb.net..I have 2columns in sql table..I have tried this query.. But i'm getting error.
TextBox11.Text = Val(27)
cmd = New SqlCommand("SELECT outside,power FROM vijay21 INNER JOIN vijay22 ON vijay21.outside=vijay22.outside WHERE outside BETWEEN " & Val(TextBox11.Text) & " AND " &
[code].....
View 4 Replies
Jul 12, 2011
have a datagridview containing 2 tables left joined, so that:table1 LEFT JOIN table 2 ON table1.id=table2.idI get an error whenever I try to edit my datagridview."invalidOperationException was unhandled by the user codeDynamic SQL generation is not supported against multiple base tables."The error points to this line:
da.FillSchema(dt, SchemaType.Mapped)
da.Update(dt) << This line
'da = dataadapter
[code].....
View 3 Replies
Sep 12, 2011
I have a vb.net web application and when a particular function runs , i get data timeouts in the rest of the application..(ie..row not found errors or column does not belong to table but it does) The function is adding multiple rows in multiple tables in the database and is running in a for loop. It seems to be all SQL related but I am not seeing anything in the error logs in SQL or in the application Right now I am assuming it is memory related where to start note..the for loop will be replaced with a bulk insert but right now I jest need to resolve the issue of the timeouts
View 1 Replies
Feb 22, 2010
I am trying to develop a report that displays the result of a query that returns two tables. The first table is always a single row of values, the second should be a grid. I can get a report to display either independently, however it will not allow me put them both on the same report.
View 1 Replies
Jun 16, 2010
I am working on a Visual Basic 2008 program using an Access 2000 database. My SQL codereturns no records, but I know the table has a record. A simplified example of the code looks like this:
SELECT Table1.Field1, Table1.Field2, Table1.Field3, Table1.Field4, Table2. Field1, Table2.Field2 FROM Table1 INNER JOIN Table2 ON Table1.Field1 = Table2.Field1 AND Table1.Field2 = Table2.Field2 WHERE Table1.Field1=@Field1 AND Table1.Field2=@Field2;
[code].....
View 2 Replies
Feb 20, 2010
Lets assume that I have 2 tables:
First one is customer table and has primary key called cusid ( auto increment)
Second one is order table and has foreign key custid
How I can connect them, what I mean exactly when insert the record in the customer table I need the foreign key get the same value as primary key in customer table. I'm using sql server 2008 and vb.net 2008.
View 1 Replies
Apr 25, 2011
I have an application which upon a save button needs to save data to 8 different tables. 7 of those tables will have multiple new records added to them, while 1 will have just one new record. I want to encapsulate this giant Insert operation in a Transaction so that it will not complete unless I can save successfully to all tables.I have considered using Insert commands to a command statement, but adding what amounts to like 50 parameters, and the fact that using a parameterized query means it becomes very difficult to troubleshoot problems such as invalid values in the SQL statement (since I cannot figure out what the statement looks like with values in it
View 3 Replies
Sep 18, 2009
I have a small project i am doing for work to compare our website catalogue to our actual inventory in our financial software. To do this, i have exported the online catalogue as a delimited text file using "^" as the delimiter. I then want to go into our Accpac data a find out if all the items are still active, the current price and the stock on hand.
[Code]...
View 6 Replies
Oct 15, 2011
I have a question regarding the dataset usage in Reporting Services. I have a stored procedure which returns multiple select statements (result tables), and I created a Dataset in Reporting Services 2005 with this stored procedure. The problem is that I can not reference the second or third result table, and I can only use the first select statement fields. Is this the limitation on Reporting Services Dataset or is there a way to use multiple table results in one dataset?
View 1 Replies
Dec 20, 2011
I am trying to load a crystal report from two tables but it seems that is not working.Here is the code to load the crystal report:
Code:
Private Sub InvoiceLoad(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code]......
View 1 Replies
Nov 10, 2008
A suite of apps will be using various tables out of the same sql server database.Regardless of which app is being used, the database structure must stay current. (ie:contain all the tables/fields to run any/all of the apps)So, when the user starts any of the apps, it needs to check the database, for the existence of all the tables and fields it needs, then update if necessary.
View 1 Replies
Oct 9, 2008
I want to make relationship between them Where In the F column of Table2 will sum the numbers in F column of table 3 according this condition ( show in the pic.)For the same data in columns(B,C,D) between two tables Example: Table 2 include in B,C,D data HH XX FF There are many data (HH XX FF) in tables3 in same columns(b,c,d) so it will sum the numbers in F column that in the same row with the data (HH xx FF), and insertded the results in the in table2 in F colmn in the same row with (HH XX FF)
View 10 Replies
Nov 22, 2009
So Im working on updating our company's program from Visual FoxPro to VB and this is the first step. I can access and read data from the table
Code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
View 1 Replies
Aug 15, 2011
I am having difficulty with a SQL query in my project.I have 3 tables.
T1:
- Date
- ID
- Location_ID
[code]....
From this I need the T1.Date and T3.Result based on Location in T2.So my I need a query to compare a known location, get the Location_ID. Then Use that Location_ID to get the Date and ID. Use the ID to get the Result from T3. (Value is a variable with the known Location)
This is what I have tried:
"SELECT T1.Date,T3.Result _
FROM T1,T2,T3 _
WHERE T1.Location_ID = (SELECT T2.Location_ID FROM T2 WHERE T2.Location = '" & Value & "') AND T3.ID = (SELECT T1.ID FROM T1 WHERE
T1.Location_ID = (SELECT T2.Location_ID FROM T2 WHERE T2.Location = '" & Value & "'))"
I get the error 'Sub query returns more than 1 value...'
View 6 Replies
Dec 22, 2010
I'm using VB.Net express with an Access file, and I have the following tables:
table Formula
id | name
-------------------
1 | formula 1[code]....
So each formula have one or more components.Which query will I use if I want all the formulas with for example Component A AND Component D (Result: formula 1, formula 2)? I try something with intersect, but it seems it doesn't work in VB...
View 2 Replies
Jun 13, 2012
I COMPLETELY understand how redundant this is but I NEED it.Upon users creating a User account which only contains the ID, Username, Password and CustomerID I must also have a record in Customers create itself but null everything and the User.User_Customer_ID must update to the newly created Customer.Customer_ID
I have everything working but this pesky update query. The ONLY thing it needs to do is change User.User_Customer_ID to Customer.Customer_ID I managed to story the User.User_ID in an integer called UserID and Customer.Customer_ID in an integer called CustomerID I have tried a million different ways with no success
[Code]...
View 2 Replies
Apr 26, 2008
For the past 3 weeks now, we are encountering a sudden loss of table in our database, but with that. our .mdf file is still on its same size before this disaster comes along and again..anyone had encountered or know how to solve this problem.
View 3 Replies
May 3, 2010
there are three tables in dbf , table1,2,3 respectively all are contains similar structure but different data Structure : S.no Quiz Question i want the query which select the Quiz Question/records through user given Range from Textbox1.text to Textbox2.text
View 3 Replies
Jul 28, 2011
I want to update two tables by single query
View 2 Replies
Feb 19, 2008
I have code that connects to queries in an access database.
[code...]
Is the data not filling in because of the schema information not being retirieved? If so, is there a way around that?
View 3 Replies
Feb 25, 2011
I have a form that when you click a button it begins a query. I want the user to know that they already started a query and they basically need to wait and not hit the button again. To do this I have a list box that has an lbResults.item.add() to it
Code:
Private Sub btnControlKSMS1117Query_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnControlKSMS1117Query.Click
[code]....
View 1 Replies
Mar 18, 2009
Im trying to create a form in VB that allows the user to perform queries on a number of tables which are in access.
View 3 Replies
