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5 lip 2010 · SELECT *. FROM. tblProducts as products. WHERE. product.intID = @id. AND product.dateMain >= @startDate. AND product.dateMain <= @endDate. If @startDate AND @endDate are both null then I want it to return the rows ignoring the date check in the where clause.
17 lis 2015 · If you're checking whether or not the value is NULL, there is no need to convert it to a date, unless you wanted to return a date value (which you don't seem to). Instead, use: SELECT ISNULL( DOB , '') Which will return '' if the value is NULL. A NULL date is NULL (no value).
The ISNULL() function can be used anywhere that the SQL syntax allows for the use of a function but the main use case for this function is in the SELECT list of a SQL query when you want to convert any NULL values being returned to something more descriptive.
10 cze 2023 · The first way is by specifying either NULLS FIRST (show NULL values at the top) or NULLS LAST (show NULL values at the bottom). This only works in PostgreSQL and Oracle. Using NULLS FIRST: SELECT first_name, last_name, email_address FROM customer ORDER BY email_address NULLS FIRST; Using NULLS LAST:
20 cze 2024 · This tip will help you understand what NULL means in the context of the Microsoft Fabric data universe, which includes SQL Server. It will then show how these values can make queries act unexpectedly and how to best interact with NULL values to avoid problems.
The IS NOT NULL operator is used to test for non-empty values (NOT NULL values). The following SQL lists all customers with a value in the "Address" field: Example
24 paź 2014 · I would like to convert a datetime field to varchar so I can show a blank or a message when the date is NULL. This is what I have so far: select. isnull(us.Date,0) as USDate, isnull(au.Date,0) as AUDate. from ustable us. left join autable au. on us.column=au.column. Right now this is showing: USDATE . 2014-10-24 10:29:07.450.
