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Using an external variable as a field value
Posted on 2013-01-07
I wish to update the values in a column in a field in a table using an update query with the value of a variable called MonthVar which was declared in a module called modFunctions. How would I refer to this variable?
[X]
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12 Comments
Active today
If you are using Access 2010 (?), I would suggest using TempVars() ... very cool.
Short tutorial by Access MVP Juan Soto
http://blogs.office.com/b/microsoft-access/archive/2010/09/27/power-tip-maximize-the-user-of-tempvars-in-access-2007-and-2010.aspx
mx
Short tutorial by Access MVP Juan Soto
http://blogs.office.com/b/microsoft-access/archive/2010/09/27/power-tip-maximize-the-user-of-tempvars-in-access-2007-and-2010.aspx
mx
Active today
Unlike Global variables, you can refer to the TempVar() collection from a Query - like you would a Function call to retrieve your global.
mx
mx
I did what you suggested. So in the Query Design would the variable look like like this:
[TempVars]![MonthVar]
[TempVars]![MonthVar]
Active today
Then TempVars() is the slickest way to go.
Basically ... set your tempvar item (where ever)
TempVars.Add "SomeVarName", <value>
In your query - create an expression (or criteria) that retrieves the TempVar var using
TempVars(SomeVarName)
Basically ... set your tempvar item (where ever)
TempVars.Add "SomeVarName", <value>
In your query - create an expression (or criteria) that retrieves the TempVar var using
TempVars(SomeVarName)
Active today
Two examples:
SELECT Table1.FIELD1, Table1.FIELD2
FROM Table1
WHERE (((Table1.FIELD3)=TempVars("YourVarName")));
SELECT Table1.FIELD1, Table1.FIELD2, TempVars("YourVarName") AS GetMyVar
FROM Table1;
Remember ... somewhere you have to initialize the TempVar item ... maybe in the On Load event of a Form, etc.
mx
SELECT Table1.FIELD1, Table1.FIELD2
FROM Table1
WHERE (((Table1.FIELD3)=TempVars("YourVarName")));
SELECT Table1.FIELD1, Table1.FIELD2, TempVars("YourVarName") AS GetMyVar
FROM Table1;
Remember ... somewhere you have to initialize the TempVar item ... maybe in the On Load event of a Form, etc.
mx
Active today
Another super cool thing about TempVars. IF ... an error occurs and a reset occurs - this does NOT hose the TempVar collection - just like if they were in a table.
mx
mx
If the variable, MonthVar, was declared at the top of the module (which would make its scope global), then you could create a function to that can be used to retrieve this value like so:
=GetMonthVar()
I agree though with MX, if you are using 2007 or newer, TempVars is the way to go. You would assign your value in your code like so:
=TempVars!MonthVar
Function GetMonthVar() As Integer 'Or String or whatever data type...
GetMonthVar = MonthVar
End Function
=GetMonthVar()
I agree though with MX, if you are using 2007 or newer, TempVars is the way to go. You would assign your value in your code like so:
TempVars("MonthVar") = 5
=TempVars!MonthVar
I guess I should have refreshed this page first. :-)
The other cool thing about TempVars is that you don't have to declare it in a module for it to be available globally.
Ron
The other cool thing about TempVars is that you don't have to declare it in a module for it to be available globally.
Ron
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