Combining Active and Backup Database Records in Union Query

Introduction.

Microsoft Access database has a maximum size limit of 2GB. To maintain performance and avoid reaching this limit, older records (such as previous year’s transactions) can be safely archived into a backup database for future reference. Once these records are backed up, they can be deleted from the active database. Run the Compact & Repair Utility to optimize performance for day-to-day operations.

However, there are situations where older data is required for analysis—for example, preparing budgets, setting sales targets, or comparing trends.  In such cases, we may need to reintegrate archived records with the current master table in the active database to perform meaningful analysis.

The Union Query Solution.

We can merge records of both the active table and backup table (with the same name) in a Union Query.

A simple example is given below:

SELECT Export.* 
FROM Export
UNION ALL SELECT Export.*
FROM Export IN 'G:\NEW FOLDER\DB1.MDB';

From the above example, you can see that the names of the tables exported to an active database, and backup database(DB1.MDB) are the same. No need to link the table to the active database to get access to the data from the backup database.

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ROUNDUP Function of Excel in Ms-Access

Introduction.

Microsoft Access doesn't have this function built in. An attempt to write the code for this function, and you may use it at your own risk. Before going into the code, take a look at the usage examples of this function in Excel.

ROUNDUP() function in Microsoft Excel.

The Rules.

Rounds a number up, away from 0 (zero).

Syntax: ROUNDUP(number, num_digits). A number is any real number that you want to be rounded up.

Num_digits is the number of digits to which you want to round off the number.

Remarks: ROUNDUP behaves like ROUND, except that it always rounds a number up.

If num_digits is greater than 0 (zero), then the number is rounded up to the specified number of decimal places.

If num_digits is 0, then the number is rounded up to the nearest integer.

If num_digits is less than 0, then the number is rounded up to the left of the decimal point.

Examples: 

=ROUNDUP(3.2,0) Rounds 3.2 up to zero decimal places (4)

=ROUNDUP(76.9,0) Rounds 76.9 up to zero decimal places (77)

=ROUNDUP(3.14159, 3) Rounds 3.14159 up to three decimal places (3.142)

=ROUNDUP(-3.14159, 1) Rounds -3.14159 up to one decimal place (-3.2)

=ROUNDUP(31415.92654, -2) Rounds 31415.92654 up to 2 decimal places to the left of the decimal (31500)

Courtesy: Microsoft Excel Help Documents.

Copy and paste the following VBA Code into a Standard Module of your Database and try it out. The examples given above have successfully passed testing of the code.

The ROUNDUP() Function.

Public Function ROUNDUP(ByVal dblNum As Double, ByVal intprecision As Integer) As Double
'-------------------------------------------------
'ROUNDUP() Function of Excel Redefined in MS-Access
'Author: apr pillai
'Date  : June 2016
'Rights: All Rights Reserved by www.msaccesstips.com
'-------------------------------------------------
On Error GoTo ROUNDUP_Err
Dim sign As Integer
    sign = Sgn(dblNum)
    dblNum = Abs(dblNum)
    dblNum = dblNum * 10 ^ intprecision
ROUNDUP = (Int(dblNum + (1 - IIf((dblNum - Int(dblNum)) <> 0, (dblNum - Int(dblNum)), 1))) / 10 ^ intprecision) * sign

ROUNDUP_Exit:
Exit Function

ROUNDUP_Err:
MsgBox Err & ": " & Err.Description, , "ROUNDUP()"
Resume ROUNDUP_Exit
End Function

Suggestions for improvement of the above VBA Code are welcome.

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