Recent content by Husan

  1. H

    MS Access 2007: Subtracting values from two consecutive records

    Hi, i dont think an autonumber field can be dynamcally created in a query, only in a table. We could try and generate an auto number using the date/hour but it wouldnt have afixed increment value as the hours will change from 24 to 1. but i think i do have a solution, its basicaly using a...
  2. H

    MS Access 2007: Subtracting values from two consecutive records

    Hi, In my 1st suggestion, you actually dont need to make a copy of the table. It works only from 1 table. Whats its doing is referencing the same table twice. ie in the sql satement: FROM tblReadings INNER JOIN tblReadings AS tblReadingsPrev its still reading the same table tblReadings...
  3. H

    MS Access 2007: Subtracting values from two consecutive records

    Hi, An alternative method would be to add another field to your table which would be a numeric sequence of all the readings. ie the first reading would have a readingID of 1, the second 2 etc: ReadingID Date Hour Total_MWh 1 1/1/2000 1 182.789 2 1/1/2000 2 182.996 3 1/1/2000 3 183.006 4...
  4. H

    MS Access 2007: Subtracting values from two consecutive records

    Hi, This may work, if your hour field is a numerica value and always increment by 1, then you can link the table to itself within a query. You would relate the date and the current hour with the previous hour, giving you the previous reading. for example if yr table is called tblReadings then...
  5. H

    Combining different tables

    Hi, you are right you would use a union select query, as the tables do not have the same fields, we can make the changes to view inthe query. table 1 has all the fields so you would show everything from that. you would add thr missing fields in table 2, giving you identical tables making the...
  6. H

    Retriving Specific records that contains time

    if you set the default value of IOData.IODate to =Now() this captures the date & time then in yr query you could use the criteria: WHERE IODate=Now()
  7. H

    combo box question

    from the look of yr sql you dont need to link to tblRAO as you are using RAO_ID to link and then to filter too, i'm assuming that RAO_ID is a numeric field and txtRAO is the first combo box, in this case use the following on the afterupdate event of txtRAO me.secondCombo.recordsource="SELECT...
  8. H

    totals in forms hlp plz

    try =sum([Unit Price]*[Quantity]) and put it in the report or group footer.
  9. H

    Another text date question

    convert text to date using cdate(string)
  10. H

    Check Box

    this is correct, a TRUE value is identified as -1 and False as 0, if the datatype is Yes/No in yr table then you just need to change its display format.
  11. H

    Replacing Null values in a query with Text

    try using: nz(Employee_List.Manager,"Unknown") and also you need to include the above field in yr query but dont display it.
  12. H

    qdef.Execute options??

    why dont you get yr query working with the 4 columns first. once you happy with this then just create a new query based on this where u return the 4 colums + add a new column usinf iif statement and dlookup then use that for yr listbox.
  13. H

    find duplicates in one column, match numbers in another

    try adding a new field in yr query using DMIN, somethin like: Expr1: DMin("Code","table2","Name='" & [name] & "'") replace table2 with the name of the table with the data. you have problems with Amir's as it has an apstrophe....
  14. H

    qdef.Execute options??

    i would suggest creating a 5th column in yr original query using a iif statement with a dlookup inside it: somethin like this: 5thField:iif(isnull(4thfield),null,dlookup("Portfoliocode","tbl_Portfolio","PortfolioID"=4thfield))
  15. H

    Current Date problems

    try this, create a new query, view in SQL view, then paste the following (but remember to replace Table1 with the name of table with date fields in): SELECT Table1.* FROM Table1 WHERE (((Date()) Between [date_from] And [Date_to])); View it design view later to see wat its doin. basically u...
Back
Top Bottom