MS Access SQL - data type mismatch

[noisepoet]

Hi. While I've been writing Oracle SQL queries for a few years now, I'm relatively new to MS Access SQL. There are surprisingly few resources available online (via Google) for MS Access SQL. Given that, I'm having difficulty figuring out how to format a field which is text as a number (or vice versa). Do I use FORMAT()? Is it like this: FORMAT(FieldName,'General Number') ?

Thank you.

 

[james_lankford]

are you doing a select statement ?

select * from my_table where my_table.FieldName = cdbl ( a_text_value )

 

[noisepoet]

Yes, I'm using a SELECT statement.

While I'm able to go into Design View and change the data type that way, it's kind of a hassle. I'd prefer to do this via SQL.

 

[Norie]

Can you show the SQL that's giving you a type mismatch?

 

[noisepoet]

It may not be very helpful. It's literally: AND A.FieldName = B.FieldName. The issue is that Table A has the value expressed as numeric, whereas Table B has the same value formatted as text.

 

[Norie]

Is this criteria for a join?

 

[xenou]

format can work here, but it would always return text (so you would want to format the number and compare to the text value).

Also in MSAccess the C functions (CInt, CDbl, CStr, etc.) will cast values to other datatypes, so probably good is to convert the text to number also (except would probably blow up if you try to convert a non-numeric text string to a number so beware).

where format(A.FieldName1,"#") = B.FieldName2

or

where A.FieldName1 = CInt(B.FieldName2)

 

[noisepoet]

Very helpful. Thank you.

 

[xenou]

Actually I should have suggested CLng - cast as long integer

where A.FieldName1 = CLng(B.FieldName2)

MSAccess ints are what most other systems call short ints - limited to values between -32768 to 32767. Most Access number fields are Long Integers or Doubles.

 

[james_lankford]

Yes, I'm using a SELECT statement.

While I'm able to go into Design View and change the data type that way, it's kind of a hassle. I'd prefer to do this via SQL.

that was sql

its a simple selct statement

select * from my_table where my_table.FieldName = cdbl ( a_text_value )

are you sure you've done oracle for years ?