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Change a Field's Data Type

Change a Field's Data Type
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When you first design and build a database, you plan one or more tables, define the fields (columns) for each table and set a data type for each field. For example, if you need to store dates and times, you set a field to the Date/Time data type. If you need to store names and addresses, you set one or more fields to the Text data type, and so on. Here are some steps on how to change a field's data type in Microsoft Access 2003.
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Change field type

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I have a table with 260,000 records. I need to change a field type from character to date. When I try to change a field type from text to date I get the following error:

Microsoft Office Access can't change the data type.
There isn't enough disk space or memory.

What causes this error and what can I do to fix it?
 

Memo to Text Data Type

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I have a couple of fields spread across the database named "Notes" which is currently set as memo data type, I would like to change it to text data type.

What I already know:
1. Text data type can only have a maximum 255 characters.
2. Memo data type can store up to 1000 characters.

* I am sure that we don't need more than 255 characters for it; not now not ever, and we currently don't even have 50 characters stored in a single field so the truncation matter is out of the question.

What I would like to know:
1. Could I just directly change the Data Type of All Notes field in our Back end from MEMO to TEXT. Is it safe that way?

2. Is there a possibility of a corruption issue after the change or future use?
 

Modify or change the data type setting for a field

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This article explains how to set or change the data type applied to a table field in a Microsoft Office Access 2007 database. When you first design and build a database, you plan one or more tables, you plan the fields (columns) for each table, and you set a data type for each field. For example, if you need to store dates and times, you set a field to the Date/Time data type. If you need to store names and addresses, you set one or more fields to the Text data type, and so on.
 

Change field to combo box w/out data loss

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Using access 2003 is it possible to change the type of a field from text to combo/picklist without data loss? Whenever I use the Lookup wizard it warns me that all the data will be lost when I try to change it.

I have a field in which the user is typing the same 4 values over again so it makes sense to change the field to a picklist. There are 400 records so I'd rather avoid having to go through each record and re enter the data.
 

can't change the data type or field size

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I am creating/editing updating fields in table design. I am trying to change the field size of the first field. But getting message. 'You can't change the data type or field size of this field, it is part of on or more relationships. I deleted the relationship and still get the message. Can I screw anything up if I delete any other relationships. Or does access re-connect all relationships on demand.
 

Change Access 2010 Table Field’s Data Type

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In Access 2010, you will a lot of Table Tools to let user change table fields settings. Since data type has to be specified for each field, it also allows user to change the data type on the fly without opening database in design mode.
 

Data Type mismatch in criteria expression

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I have an update query that is giving me the error message in the thread title. I know what field the error is occuring in. The field in the table to be updated has a "text" data type. The criteria I'm using for the field in the update query is as follows: Like "2011A*", becasue I only want to update different types of 2011 Actual data in that field.

I don't want to change the data type for the field in the base table because it is linked to to many other tables and queries in the database and I fear that messing with it will screw up abunch of other relationships
 

Change Field Type for Linked Table FE/BE

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Now I know you cant directly change the data-type for the BE table from the FE sections.

However is it possible to use the FE to open the BE DB, access the BE Table with the field type I want to change, and then change it? Even if I were to have some code in the BE that I would send data to or something.

Would something like this be possible?

OpenDatabase ("C:\AccessDatabase_be.mdb")

(WhateverThingToPointToBEDatabase).Execute "ALTER TABLE [" & strDatabase_Table_ID & "] ALTER [" & strField_ID & "] [" & strField_Type & "];"
 

Can't change Table Field Name to All Caps

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XP/2010

I have a table with a field name "distcode." I need to change it simply to all caps; DISTCODE. In Design Mode I type DISTCODE, save, and when I view the table the field name is all caps. But when I close the database and reopen the table the field name is back to all small letters. What is forcing this default change?

The Data Type is Text, and this table is not linked to another table
 

Type mismatch in query

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I have two tables that I need to query. Table 1 has the field stored as a data type is a Number (Long Integer). Table 2 has the field stored as a data type of Text.

They are essentially the same field in both tables, two different developers created the data types. I don't have the option to change one of the data types at this time. Is there an easy way that I can run a simple query over these two tables using the mismatched fields as the join?