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21 sie 2010 · There is a DateTime field that I have to include in my INSERT statement. This field is NOT defined as "Required" in Access, meaning that it is indeed NULL-able, and in fact some of the rows in the Access database are already NULL. The problem I'm having is simple: How to insert NULL through SQL?
11 lut 2020 · In SQL Server we can use IsNull() function to check whether expression value is null or not. For ex. Select IsNull(sum(amount),0) as TotalAmount From Payments
20 gru 2023 · My DB has an end date for closed accounts. Some customers have returned and I want to remove the end date on their record. I have a added a new data source containing the customers details and all data matches. Happy with this. I have said the following: Field: Closed Date. Table: Customer Records. Criteria: Is Not Null And <>"" Update To: ""
This criterion applies to a Date/Time field, such as BirthDate. Only records where the number of years between a person's birthdate and today's date is greater than 30 are included in the query result. Is Null. This criterion can be applied to any type of field to show records where the field value is null.
17 mar 2022 · If DateOfIssue is Null then use DateOfExpectedIssue. if DateOfIssue is Not Null then use DateOfIssue. I have tried to modify but not sure if the following logic is correct: Nz([DateOfIssue],0) since not sure if a date can have a 0 value.
2 lut 2012 · Here are some common date criteria examples, ranging from simple date filters to more complex date range calculations. Some of the more complex examples use Access date functions to extract different parts of a date to help you get just the results you want.
16 wrz 2020 · The important thing to understand about NULL is that it is not a value, but the absence of a value. Because it is not a value normal operators like =, <>, <, > etc. cannot be used. If you compare anything with a NULL the answer will always be NULL, neither TRUE nor FALSE.
