Access Query : Include Blank Fields Now that you have created a new table, you can add relevant fields to your query by selecting a field name and dragging it over into the query column. If you are planning on using any blank fields , you will need to add the relevant query criteria at this point.
An example would be 4 records with the same account number. The first record for that account does not have a course date. When I run the query , it does not return the record with the empty course date cell but does return the other 3 records. I need the query expression or criteria to include the record with the empty course date.
For normal text, Access handles strings with only spaces as empty strings (e.g. SELECT " " = "" returns -1 = True). This means that the solution introduced by June7, WHERE TextField & "" = "", is likely the most efficient solution. Another contender is the Nz function, which is handled by the database engine and somewhat optimized.
Dealing with Blank Values (Nulls) Databases have two types of fields : required and optional. Ordinarily, fields are optional, which means a sloppy person can leave a lot of blank values. These blank values are called nulls, and you need to handle them carefully.
Since the field could be null or could contain a zero-length string, you can try entering the following into the criteria "Cell". IN ("TBD","") or Is Null The WHERE clause if you are looking at the SQL statement would look like
Since Access allows null values, it's your job to determine whether you want to store them. Generally, the data will be your best guide. If the nature of the data requires that all data be present...
Fields that you leave blank are ignored. When you click a command button on the form, Access runs a query that uses the search criteria from your form. To use the QBF technique, follow these steps: Open the sample database Northwind.mdb.
Question: In Microsoft Access 2003/XP/2000/97, I have a query that in which I try to exclude certain records based on an entry in a particular field (eg. something like "not C"). For some reason, Access also seems to strip out the NULL values as well.
For example, = "Chicago" is an expression that Access can compare to values in a text field in a query . If the value for that field in a given record is "Chicago", Access includes the record in the query results. Here are some examples of commonly used criteria you can use as a starting point to create your criteria.
Microsoft Access Parameter Queries Return All Records When a Query Parameter Is Blank Is it possible to create a parameter query , where if the parameter input box is left blank will return all of the records?