ms-access

问题 Related to this question, how do I detect that a form user is adding a record? It would be ideal if I knew this as soon as the form's "current record" became "new" (navigating beyond the last existing record, or clicking the "new" navigation button), but knowing as soon as the first piece of data begins to be entered would be almost as good. I'm guessing that this would be testing something in Form_Current() , but what (or is there a better way)? Further related, what is the earliest that I

问题 I have four tables in Access 2010, each with the same primary key. I'd like to join all the data in all four tables into one table with columns for each value tied to the primary key over all the tables. So, for example: Table1 ID Value1 1 10 2 7 3 4 4 12 Table 2 ID Value2 1 33 2 8 6 19 7 4 Table 3 ID Value3 1 99 2 99 5 99 7 99 I'd like to create: Table 4 ID Value1 Value2 Value3 1 10 33 99 2 7 8 99 3 4 4 12 5 99 6 19 7 4 99 I'm using MS Access and I know I have to basically use 3 joins (left,

问题 I have a form that people can use to send emails to our clients. The user has an option to select between two canned messages (Message "1" or Message "2"). Behind the scenes, every time they hit the "SEND" button it logs into a "RECORDS" table (so long as it makes it through the error handlers). Let's pretend the RECORDS table has 2 columns: CUST_ID EMAIL_NUM 0000 1 0000 2 0000 1 0000 1 0001 2 0002 1 0002 1 0003 2 0003 2 0003 2 I need a query that counts the ones and twos for each CUST_ID. So

问题 I am using 32-bit R with RStudio to try and connect to an .accdb file. I have 32-bit MS Access running on my machine. R version: platform i386-w64-mingw32 arch i386 os mingw32 system i386, mingw32 status major 3 minor 1.2 ... language R version.string R version 3.1.2 (2014-10-31) nickname Pumpkin Helmet I'm trying to use the RODBC package to connect to an MS Access database. I cannot use odbcConnectAccess("location_of_database.accdb") to connect to a database provided by a client. This

问题 When I try to use cursor.primaryKeys("tablename") then exception occurs: Error: ('IM001', '[IM001] [Microsoft][ODBC Driver Manager] Driver does not support this function (0) (SQLPrimaryKeys)') list(cursor.columns(table='tablename')) does not reveal primary keys either. 回答1: For Access ODBC we can get the Primary Key columns via the .statistics method of the pyodbc cursor object: crsr = conn.cursor() table_name = 'MyTable' # dict comprehension: {ordinal_position: col_name} pk_cols = {row[7]:

问题 I have a report in MS Access where the underlying data in the tables changes irregularly. I'd like the report to reflect these changes automatically, either by reloading the form say every 10 seconds or either the report gets a notification about the changes and shows the new data. Is this possible? 回答1: The only way I can think of doing this is not elegant: Create a hidden form with it's timer interval set to 10 seconds (or whatever interval you need). When the Forms' timer event fires,

问题 Below Is my Update query ,it was working fine,but when I have added int DrId in parameter fields (at last) to check where condition,after this it is showing me following error No value given for one or more required parameters. where is the mistake ,since DrId is my Primary Key I won't update it public bool UpdateDrMaster(string title, string FirstName, string Mname, string lastName, string regNo, string speciality, string contactNo1, string contactNo2, string city, string addrss, string

问题 I'm looking for a query that will: read the current value of one row in one column, compare it to the row above it, and sequentially count up if the row above is a match. Essentially, this sounds like a running tally-up as opposed to a Count(*), almost like the rows should go Count(Variable)-1 on each set of rows until it hits a minimum of zero. The below example assumes we have a list of daily sales and counts the occurences of a given product ID. Is this possible? Select Count(ProductID) AS

问题 I'm creating a database to track our participants in Access 2010. Main data is stored in a table called ParticipantMaster. I have a few fields in ParticipantMaster that I want to assign lookup values to. School (MLK High, Central High, Northeast High...) Interests (Visual Arts, Drama, Sports, Literature....) Color (Red, Blue, Green...) I could create a table School, another table Interests, another table Color, and then have the source for each one to be SELECT Color.ColorName FROM Color and

问题 I am trying to get a fullpath and filename using the file dialog from MS Access VBA. What I am trying to do is to open the file Dialog on button click by calling this function. This function should return the fullpath and filename that was selected from the filedialog. I commented the loop part because I only want to select single file. This function is returning an error Error: 0 after I select a file So far this is my code. Anyone can figure out what's wrong? Thanks Public Function