Counting How Many Times Certain Number Appear In One Column
May 31, 2010
I have an SQL database with a single table with several colunmns. I want to count how many times a certain number appears in one of the columns. E.g. I have the following:
A B C
8 4 6
0 9 3
1 4 6
4 7 1
I want to count the number of times 4 is used in column B. I have looked at using the following, but not sure if this is even the right approach:
Dim db as New MainTblDataSet
Dim BCount = Aggregate B In db.MainTbl Into Count(B.B = num)
where num=the number I am counting the instances of (4 in this case).
The hope is that BCount will equal 2, but it returns 0 every time.
I am trying to count the number of times a specific character is in a string. The problem is when I run the program the letter doesn't advance from "d" in the string "debugging" and doesn't display the number of time the character "g" is found.
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click Dim letterCount As Integer
I have a datatable that stores information on employees. What i'm trying to do is use it to run a seniority list looping through the table using the current system date. The looping part i have no problem with, and the system date calculation also i know how to do. The problem call the date from the startDate column to do the calculation.
i have tried
dim sDate As date = "startdate"
but i get an error that it cannot be converted to date.
i am trying to make a coin toss program where you toss a coin a certain number of times then repeat it a certain number of times. the problem i have is "heads(counter2)" the word "heads" has a blue error line under it how do i sort the error out and also is all the code right
Public Class Form1 Dim tosses, repeat, heads As Integer Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
I have this program generating a firstname and lastname from a file. When I run this program I enter information in three textboxes. The first two are the salary low and high(salary1.text, salary2.text) and the last one is the number of "copies"(copies.text) that I want.. When I put a number such as 10 in the text box it outputs some of the same names. The firstname file has around 100 records and the lastname file has about 1000 records Why is it generating the same name The problem is even worse if I do something like 1000 copies.. it outputs the same thing 8 times and then does something different another 8 times
Public Class Form1 Dim sex As String Function randomfirstname() Dim infile As IO.StreamReader
'search Male Dim cmdTextName As String = "SELECT isnull(Count(Gender),0) as TotalMale FROM tblStudent WHERE (Gender = Male)" Dim sqlcmdName As New SqlCommand(cmdTextName, New SqlConnection(GetConnection)) sqlcmdName.Connection.Open()
[code]....
Am trying to count the number of male in my table however when i try to run using this code it pops an error which is "invalid column name Male" what seems to be wrong with my statements?
i have a datagridview linked to a access DB that right now looks in the 5th column and counts the number of "c","o" (completed and open) but it gets the count from the entire data base. I am able to filter the ones for a certain day and view them on the grid but how to count the number of occurrences that are visible and not the ones that have been filtered out?
I am using a tableadapter to connect my project to an MS database. I need a a function which counts the number of rows in the table for something which I am doing. I have sucessfully used the count function to count the number of rows for my other tables, but when I tried to reuse it for another table, it wouldn't work. I get an error...
An unhandled exception of type 'System.ArgumentException' occurred in System.Data.dllAdditional information: Input string was not in a correct format.Couldn't store <AH25> in ProductCode Column. Expected type is Int32.
and this is the code which I used
Dim record As Integer = TAProduct.GetData.Rows Do Until record = TAProduct.GetData().Count ' other codes loop
It only seems to work if the first column is an integer datatype, which is the case for my other tables, but the table which I am currently dealing with using a string datatype. Is there another way to count the number of rows without using SQL statements or can I adapt my existing code in some way?
I have put datagridview on form. I have add one column and 7 rows. Beginning four row contain value "PASS" respectively and last three rows contain value "Fail" respectively. I have to count total fail values in a column in CellEndEdit Event.
I have a display system that I created in VS Studio 2005 that uses ini files for certain functions. Reading and writing to ini files is easy enough but what I just can't figure out is how to count the number of items under a particular ini section.
i am trying to count up to a number and add each number to a combo box. so for instance, the string value = 7. i want the combobox to count up to 7 in single numbers starting with 1
I have an application where event driven events are already detected. Each time an even is detected I increment a counter.I would like to add the following functionality:
1.) I would like to create a time stamp each time an event is detected and store them in some kind of data structure.
2.) I would like to count how many events are being stored (or in essence count how many events have occurred in the past 10 seconds, not once but continuously).
3.) I would then like to discard of any events older than 10 seconds note events are interrupt driven and can occur more frequently than once a second, but updating my count of how many events have occurred in the past 10 seconds can be done as infrequently as say once a second.
there are any nifty in-built .net methods that can essentially return either the number of occurrences of each element in an array, or simply return the modal value.
Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim timeN As DateTime Dim timeF As Date = #7/11/2009 12:43:20 PM# Dim timeR As TimeSpan timeN = DateAndTime.Now timeR = ????? End Sub End Class TimeN is system time. TimeF is a fixed date and time. All I need is the number of seconds between fixed and system(now) for timeR (and counting).
i am using a combo-box to add different grades to a column in a datagrid and i am using a loop to check if the sum the total number of sum i have made when ever i select a a grade from the combo-box.This is because i want to only add six grade and not more than six but the code i am using is giving me problems This is my code.This code is adding the total grade for me bur i want to check with a loop that will only allow the adition of only six different grade but when i run my program and begin to select the grades it just give me a message form my message box 'This is calculating the grades of an applicant
Private Sub cmbgrade_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbgrade.TextChanged If Me.cmbgrade.Text = "A" Then Me.txttotalaggregate.Text = (CInt(Me.txttotalaggregate.Text) + 1).ToString End If
This text book i have is not very good at all. the exercise's at the end of each chapter ask u to code projects without first covering the basic of what u will need do to code them. (Programming in Visual Basic 2008 Julia Case Bradley + Aninta C. Millspaugh)
Design and code a project to calculate the amount due and provide a summaray of rentals. All movies rent for $1.00 and all customers receive a %10 discount. The form should contain input for the member number and the number of movies rented. INside a groupbox display the rental amount, the 10 percent discount, and the amount due. inside a second groupbox, display the number of customers served and the total rental income.(afterdiscount).Include buttons for Calculate, clear, print and exit. The clear button clears the information for the current rental but does not clear the sumarry information. A print button allows the user to print the form. Do not allow bad input data to cancel the program; instead display a message to the user.[code]...
Basicly my instructor said that we have to make a program that will count how many times we enter a number into an inputbox, he also said we had to use a while loop. [code]
Is there a way to loop words for a number of times (like i want to loop a word for only 10 times....How would I go by doing that?)
Quote:
Originally Posted by EXample Like I want to have a textbox and If i put 10 in the textbox It would loop the word ten times or is I put 20 in the textbox it would loop 20 times ..and ..etc...and ...etc...
My code gets a list of words from a txt file and chooses the words randomly. However, the same word can appear more than once and i need to know how to stop this from happeningHere is the code:
Dim aryName As String() = Nothing aryName = File.ReadAllLines(Application.StartupPath & "Randomfnames.txt") Dim randomWords As New List(Of String)
I know it sounds strange but let me it explain. It has a purpose, but really all I'm looking for is the item with the most duplicates.I know it's possible and I've had a few ideas already, though none were successful or practical.What I'm doing here that requires this is creating an intuitive search for clients in a database. You type in a single field and click search. Behind scenes each keyword broken down from the single input field is searched through the table of clients, hitting each column and returning matches. the results are large in numbers, but truly it's the client that appears the same number of times as there are keywords.
How can I count the amount of times a character appears in a string?
The assignment is to create a program with 2 text boxes, label, and a button. We then need to type a phrase into the first text box, and a character in the second. Then click the button and then the label will display the output of how many times the character in the second text box appears in the first.
I have all the above setup except for how to display the amount of times the character appears in the first text box, here's a picture:
I'm trying to run a simple select statement using an ADO recordset. But the resulting recordset returns 3 times the number of rows. For example the query should return 20 rows but is repeating 2 more times and returning 60 rows. When I run the query in Oracle it returns 20 rows.
Here's the code.
sSql = "Select * from Sector" cnnOracle.Open("DRIVER={Microsoft ODBC for Oracle};SERVER=REPDATA.world;UID=auser;PWD=auser;")
Okay, so basically I'm trying to have my application randomly select items from a (multiselect) listbox. I want the user to enter the amount of items they would like randomly selected and it should all happen at the same time. I have the random shuffle down but it only selects one song each time you click the button. How can I loop this code as many times as the user specifies in the textbox?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As Dim shuffle As New Random Main.songlist.SelectedIndex = shuffle.Next(0, Main.songlist.Items.Count - 1)
count the number of times when a user enters a character followed by , and I want to count , number of times. So far here is what I have if you also know a little about the split function can you check to see if what I have is right?
Private Sub Strat0_LostFocus() Dim q1 As New rdoQuery Dim LO As Integer
