Change a Field's Data Type
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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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.
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?
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.
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.
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?
I am trying to import a date field that is sometimes blank into a table. If I leave the Data Type as text all is well. However, I want to provide the users the ability to search date ranges using this particular field.
When I change the Data Type to Date/Time format it brings in all of the data fine until it reaches a field that is blank and then stops. I have required set to No and I am at a loss as to what to do next.
There are about 5000 entries now and I don't relish the idea of re-doing the whole thing. Here goes.
I have a db that I need to correct to ensure my tables will work with each other. Table 1 has Field Name [ServiceType] - Data Type [Text], Table 2 has Field Name [ServiceType] - Data Type [Number].
These two fields are the same data but are entered from two different forms that perform two entirely different jobs.
I want to change table 2 Data Type to "Text". I get an immediate error message that says I can't do this because there are relationships between the two tables and I need to delete this or these relationships before I can make the change.
When I click on the "Tools - Relationship" tab I get a screen that indeed has the relationship. I delete the line between the two tables close and save the change.
Then I try to make my change and the error message returns. I checked the relationship screen again and find that the change I made is ok.
What am I missing? Is there another path to the relationship screen I should be looking for such that I can make the relationship changes and therebye make the table changes?
Access 2010 also allows user to change format of all supported data types. This post covers changing format of Number data type. To change the format of the field having number data type, open the table in Design view, right click the table and click Design View.
A string is text made of a readable letter, a symbol, a word or a group of words. When creating a table in Datasheet View, to apply a Text field:
(1)If you create a new field by replacing the Add New Field column header with a name, the new field automatically receives the Text data type
(2)To change the data type of a field, click its column header or a cell under its column. In the Data Type & Formatting section of the Datasheet tab of the ribbon, click the arrow of the Data Type combo box and select Text
Learning Objective: String-Based Data Types, Operations on Strings, String Concatenation, Document and Object Linking, String-Based Data Types: The Hyperlink, Objects and Data Fields, An Attachment, Using OLE Objects.
The default data type for a Microsoft Access field is text, but you can specify other data types if you wish. Choosing a specific data type ensures that you will get the best results from your queries and searches. Here are some steps on how to decide which data type to use in a table field in Access 2003.