在MS Access中使用SQL在VBA中进行类型转换？

Question

I need to convert all the records of a NON-Unicode table into a Unicode table by using something like the CAST function in SQL Server which looks like this:

Cast ([Transaction_No] as [nvarchar](14))

But now I'm using MS Access so can I do a type casting in the VBA code?
Or is there another work around that could solve this problem for me?

In my table t_Transaction I have this field: TRANSACTION_NO, defined as

DateType=Text, FieldSize=50    

And what I want it to be:

DateType=Number, FieldSize=Integer

Answer 1

Assuming that the string values are all valid integers you can use:

CInt(YourStringValue)

There are various other converstion functions along these lines (CBool(), CStr() etc).

You can even avoid this entirely as you should be able to implicitly convert them in VBA:

YourIntegerVariable = YourStringValue

Answer 2

In Access everything is treated as Unicode. You will not have to make any casts from non-Unicode to Unicode.