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24 sty 2013 · If you're just checking for NULL values, you might try ISNULL() and cast the date as a varchar. SELECT ISNULL(CAST(fu.SentOutDate AS VARCHAR(50)), '') AS SendOutDate FROM tablename
28 gru 2010 · To get all rows wtih an empty datetime column you could do this: SELECT * FROM yourtable WHERE yourdatecolumn IS NULL. answered Dec 28, 2010 at 13:39.
The SQL Server ISNULL() function lets you return an alternative value when an expression is NULL: SELECT ProductName, UnitPrice * (UnitsInStock + ISNULL(UnitsOnOrder, 0)) FROM Products;
27 lut 2007 · It is a good design practice to not allow a required column to be null, but if you have conditions where it is unknown or does not apply, it does not seem like a good practice to require a fake...
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).
6 cze 2024 · In this article, we explored several techniques for identifying NULLs and empty values within a column. In SQL, NULL represents missing or unknown data, covering cases where data is absent or uncertain. We can use empty strings for similar purposes, allowing us to differentiate between the absence and nonexistence of data.
In MySQL, 0 or NULL means false and anything else means true. The default truth value from a boolean operation is 1. NULL instead of death <>. NULL. Two NULL values are regarded as equal in a GROUP BY. When doing an ORDER BY, NULL values are presented first if you do ORDER BY ... ASC and last if you do ORDER BY ...
