ms-access

问题 I have a basic table in an Access database. In that table, I have a 10-digit numeric field that is stored as Long Text (leading zeros are significant). I extracted the unique values from that field in the table, and created a new table/field with the same Long Text data type. When I try to join that field back to the original table, I get the error: Cannot join on Memo, OLE, or Hyperlink Object. Is there a work around for this, or a known problem I need to address? 回答1: Use ANSI JOIN instead.

问题 I currently have a one to one relationship between two tables in MS Access like so: Student Results StudentResultsID (primary key, autonumber) Various fields relating to the course. AVETMISS Data StudentResultsID (primary key, long integer) Various fields relating to a specific, paper form that must be filled out by the student for each enrolment. When the user adds a new record to Student Results (this occurs everytime a student is enrolled into a course) I want to create a matching record

问题 I have got two tables named " studentBio " and " subjects ". Fields of both tables are being given below(with some values): On the form i have got something like this: AND in checkedlistbox1 i am showing corresponding subjects in the form like A+B+C. Which after retrieving from user would be split on the basis of '+' and be added into subjects table all at once. Fields of studentBio table are given as follows: WHERE (RollNo, RegYear,program, and faculty combine to make composite primary key):

问题 When I execute the code below against an MDB database, the data table is empty, however when I run this in a query tool against the database it returns 2 records. What could be the problem? Is it an issue with the date format of the parameters (ie. 8/5/13 vs 5/8/13)? Using oDB As OleDbConnection = GetDbConnection() Using oCmd As New OleDbCommand("SELECT * " & _ " FROM Table1, Table2" & _ " WHERE (Table1.Date BETWEEN @Date1 AND @Date2) AND (Table1.Id IS NULL) AND (Table2.number = Table1.num)

问题 Looked around and found a variety of answers, but nothing recent that really compares these options pro and con. So I thought I'd ask the community to weigh in on which route you prefer and why. Background This is what we have: Common set of Access modules & classes used in numerous protocol databases (Access 2010 *.accdb split front/back-ends) Front-ends link to back-end database tables & code (linked dbs) Back-ends contain protocol specific data & code Common module/class database shouldn't

问题 I am using Microsoft Access 2013 with Sharepoint lists and I have two tables: students : ID, Full name, Mobile, Start_Date (the date that they start studying at my centre), and some irrelevant fields => there are many students with different starting dates [Weeks Off] : ID, Reason, From_Date (the date that the centre is temporarily closed), [Number of Weeks] (the number of weeks that the centre is temporariliy closed from that From_Date) => in each student' study time, they may have some

问题 I have created a form in Access 2010 that is used to insert data into an existing table. The table contains a Keywords field, Source combo box, and a Code text box where i write the data to be inserted and there is a button for executing the query. The code for the form is: Private Sub cmd_go_Click() Dim insertstring As String insertstring = "INSERT INTO KWTable (KW, Source, Code) VALUES('" & text_key.Value & "','" & combo_source.Value & "','" & txt_code.Value & "');" DoCmd.RunSQL

问题 Is there a way in MS access to return a dataset between a specific index? So lets say my dataset is: rank | first_name | age 1 Max 23 2 Bob 40 3 Sid 25 4 Billy 18 5 Sally 19 But I only want to return those records between 'rank' 2 and 4, so my results set is Bob, Sid and Billy? However, Rank is not part of the table, and this should be generated when the query is run. Why don't I use an autogenerated number, because if a record is deleted, this will be inconsistent, and what if I wanted the

问题 I am trying to export the record displayed on a form in Access to an Excel template which I would then rename and use the data in further calculations. I want to click a button on the form to transfer the record to Excel, I rename it and be done. The data fields will need to go to specific cells in the spreadsheet. Each record represents a seasoning formula with fields as such: Formula_name Formula_number Date_entered Ingredient1 Amount1 Ingredient2 Amount2 Ingredient3 And so on The amounts

问题 I see version of how to do this with Dim ran as Excel.Applcation but the version of Access I am using doesn't have Excel.Application as an option. I have written the following code that runs, but does not close the file Dim Path1 as String Dim objXL As Object Dim xlWB As Object Path1 = "C:/....." Set objXL = CreateObject("Excel.Application") Set xlWB = objXL.Workbooks.Open(Path1) xlWB.Close False Set xlWB = Nothing objXL.Quit Set objXL = Nothing 回答1: You can use the following code to close