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Blank Fields in NOT Null Query Criteria

Blank Fields in NOT Null Query Criteria
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Why would a few blank fields show up in a query where I am using 'Is Not Null' in the criteria. The rest of the Nulls are filtered out - but there are 7 blank fields showing up. I went in to the table and hit delete in each of the 7 fields but they still show up in the query results.
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Returning all records when querying by form

Returning all records when querying by form Icon
I am trying to develop a form to allow the user to choose what fields to search for records with. I have set the default values of all fields to * thinking that Like "*" would return all records; however, this does not work.

Any records with null or blank in any of the fields on the form for which the user does not enter search criteria will not be included in the results.

If I use this in my query:

Like [Forms]![Search Clients]![LicenceNo] Or Is Null Or ""

I get all the null and blank results regardless of what the user enters. But what I want is to get all the results only if the user does not enter criteria.
 

Working with blank fields

Working with blank fields Icon
I have a field where the output appears blank but is not a null character. How do I query to get the blank data when it is not null?
 

Help with Query By Form - Returning No results when blank

Help with Query By Form - Returning No results when blank Icon
I am using the Basic Criteria Format detailed, I.e. I set the criteria for each field in a separate column in the query grid like this in query Design view:
Field: [FieldName]=[Forms]![FormName]![ControlName] or [Forms]![FormName]![ControlName] Is Null
Show: uncheck
Criteria: True

Which works as expected, allowing me to leave it blank and it will pull records. when I leave this blank it pulls all records regardless of MaritalStatus:

[MaritalStatus]=[Forms]![Main Form]![cboMaritalStatus] Or [Forms]![Main Form]![cboMaritalStatus] Is Null

How would I modify that query or the form to allow me to pull ONLY rows where the MaritalStatus IS NULL?
 

How to retrieve dates that meets a criteria using Query? Exp Build

How to retrieve dates that meets a criteria using Query? Exp Build Icon
I have 4 columns/fields of dates in a table: Field A, Field B, Field C & Field D. These fields can be either filled with a date or left blank. ABCD are all "Dates".

I want to design a query or report to retrieve dates from Field A. The criteria is:
Field A must be filled (I.e. there is a date, not a blank); and when dates in any field of B or C or D are not blank, A must be more recent than this/those date(s).

How do I write it? I made "A is not null" in the first criteria. And then I think I should write something like when B or C or D are not blank, A B or C or D.

I would use expression builder. I tried a couple of them I was not able to make any of them work.

Between, I am using Access 2010. The expression builder has symbols like "&" and
"AND", what's the difference?
 

Returning Null Values and Blank Criteria in Form from Query

Returning Null Values and Blank Criteria in Form from Query Icon
I am trying to get a query that runs off input values in a form in access 2010. I would like to return null values in fields and if a box is not filled out in the form to ignore this parameter.

I whave been trying to do this without creating a union query. But this is what I have so far but it keeps saying I have a syntax error and sometime I have gotten you are missing an operator.

I know what those errors mean but I am getting a little stuck at the moment.
 

Query Criteria - not working ?

Query Criteria - not working ? Icon
I am using a form with 10 fields used as a search form. The idea is for the user to enter data into any or of the 10 fields to search the database. If they leave the field blank, the search should not limit the returned data based on that blank field.

I am using a form to pass the search parameters to a query. The criteria line in the code has a statement like the following:

This allows the user to enter a wildcard search for partial entries which is very helpful.

This all works properly.EXCEPT when any of the search fields have no data in the database. For instance, if one of the 10 fields is missing data in the database (that field is null), then that record is overlooked for some reason.
 

Returning Null Values and Blank Criteria in Form

Returning Null Values and Blank Criteria in Form Icon
I am trying to get a query that runs off input values in a form in access 2010. I would like to return null values in fields and if a box is not filled out in the form to ignore this parameter.

I whave been trying to do this without creating a union query. But this is what I have so far but it keeps saying I have a syntax error and sometime I have gotten you are missing an operator.

I know what those errors mean but I am getting a little stuck at the moment.
 

Examples of query criteria

Examples of query criteria Icon
When you want to limit the results of a query based on the values in a field, you use query criteria. A query criterion is an expression that Access compares to query field values to determine whether to include the record that contains each value.
In this topic:
* Introduction to query criteria
* Criteria for Text, Memo, and Hyperlink fields
* Criteria for Number, Currency, and AutoNumber fields
* Criteria for Date/Time fields
* Criteria for other fields
 

Ignore null/blank criteria in query

Ignore null/blank criteria in query Icon
I have an update query that works fairly well, until the textbox that the criteria is based upon is blank.

I have a form that is bound to a table, with several textboxes that inherit from a combobox (this all works perfectly). After selecting the record, the user then types into another textbox what they want the record to update to. The "update to" line of the update query inherits from this line.

In the criteria lines of the query, the criteria is set to the equivalent textbox on the form, using:
 

Long list of fields, how to check if either is null

Long list of fields, how to check if either is null Icon
I have a query with 10 fields.

I need the query to return only the records where one of the 10 fields is NULL. The design window only allow 8 'levels' of criteria.