Replace null value in ms access

I saw this problem on this forum from February but it remained unresolved. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question Report abuse. Details required :. Cancel Submit. Tom van Stiphout MVP. To work around it, use an Update query.

How satisfied are you with this reply? Thanks for your feedback, it helps us improve the site. Hi MarkConrad,. Null does not. For example, in a test score, 0 means that 0 is the score of the test whereas null means that no score has been entered.

Replacing nulls with zeros will also affect averages. The average of 3,0,3 is 2 but the average of 3, null, 3 is 3 Rather than replacing the nulls with zeros, you probably need to learn how to use them when doing calculations. Thanks to all You must log in or register to reply here.

Similar threads A. Help with selecting and replacing columns that are null Where Date is over 90d ago. Abhorsen Sep 17, Queries. Replies 14 Views Sep 18, pbaldy. Query returning a NULL date - how to check for this null. Replies 15 Views Nov 30, gemma-the-husky. Writing to Null. Charles Jul 16, Queries. Replies 9 Views Jul 17, June7. You can use wildcard characters in find and find-and-replace operations, but you must use them carefully.

Remember these rules:. You follow that rule when searching for all wildcard characters except exclamation points! If you use a wildcard character in a replacement string, Access treats that character as a literal and writes it to your database.

Open the table, query result set, or form. You must open tables and result sets in Datasheet view, and you must open forms in Form view. If you only want to find records that contain wildcard characters, click the Find tab. If you want to find wildcard characters and replace them with other data, click the Replace tab. In the Find What box, type an opening bracket [ , the wildcard character that you want to find, and a closing bracket ]. If you want to run a replace operation, type your replacement string in the Replace With box.

Optionally, use the Look In list to change the field that you want to search, or search the entire table instead. In the Match list, select the option that you think best applies to your data. For example, if the wildcard characters reside at the start of your records, click Start of Field. Otherwise, click Any Part of Field to return the largest possible number of results. The find operation returns the records that contain the wildcard character. If you want to replace the wildcard, click Replace.

If you are sure that search and replacement strings will give you correct results, click Replace All. However, remember that you cannot undo the results of a find-and-replace operation.

When you know the type of pattern that each wildcard character can match, you can use combinations of wildcards, or wildcards and literal characters, to return a variety of results.

Keep in mind that the setting you choose in the Match list affects your search results. If you use an incorrect setting, your search operation may return unwanted data, or it may not return any results at all. The following table shows some ways to use wildcards and literals, and it explains how the options in the Match list can affect your results. Search strin g. Match list settin g. This syntax also works for question marks?

Returns all records that do not contain an asterisk. Keep in mind that this search pattern can return every letter of every word in a record when you use this setting in the Match list. Returns all records that contain "ma" and either "c" or "h". For example, this string returns "march" and "match", and it also returns "math" and "manic".

Returns all records that start with "ma" and end with either "c" or "h". Highlights the letters "m" and "a" and all text that follows those letters until it encounters a "c" or an "h". The following figures illustrate this. In other words, even though you are trying to exclude records that contain "c" and "h", you may see those records because Any Part of Field matches the text that precedes the brackets.

Returns all records that do not contain a "c" or an "h" if those records end in "c" or "h". For example, the find operation does not return "manic" because the word ends with a "c", but it does return "maniacal" because characters follow the "c".

Returns those records that start with "ma". Access matches any text that precedes the characters enclosed in brackets, so you may see unwanted results. You can use the Find and Replace dialog box to find quotation marks, plus several types of blank values. Fields formatted to display a value when they are blank. For example, a format may specify that a word such as "Unknown" appears in a field until you enter a value in that field. Fields that contain zero-length strings.

You enter zero-length strings by typing a pair of quotation marks with no spaces between them "". When you do that, and then move the cursor to another field, Access hides the quotation marks and the field appears to be blank.

Remember that you can enter zero-length strings only in fields set to the Text, Memo, and Hyperlink data types, and that those types allow zero-length strings by default. If you only want to find quotation marks, click the Find tab. To find and replace the quotation marks, click the Replace tab.

In the Find What box, type a quotation mark. To replace the quotation marks with another value, enter that value in the Replace With box. Note: You can leave the Replace With box blank if you want to remove the quotation marks entirely. Optionally, from the Match list, select Any Part of Field. In the Search list, select All to search through all the records. Note: If Access selects the check box automatically, accept that decision unless your find operation fails.

Click Find Next to find the records. If the find operation fails, clear the Search Fields as Formatted check box and try again.

If you are sure you want to replace the quotation mark with another value or no value , click Replace. If you are confident that you are finding and replacing the correct values throughout your table, click Replace All , but remember that you cannot undo a replacement operation.

If you make a mistake, you must run additional find-and-replace operations that reverse your mistake. Find blank fields that are formatted to show a value.

If you want to find the values and replace them with other data, click the Replace tab. To find fields, click the Find tab. If you want to find the fields and add a value, click the Replace tab. If you are replacing the null value with other data, enter the new data in the Replace With box. In the Find What box, type a pair of quotation marks with no spaces between them "".

If you are replacing the zero-length strings with other data, enter the new data in the Replace With box. Need more help? Expand your skills. Get new features first. Was this information helpful? Yes No. Thank you! Any more feedback?