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21 mar 2013 · lhd.CreatedDate is a DateTime field and is non-nullable. I want to display an empty string if the field is the minimum date (1/1/1900), but my CASE statement doesn't work; CreatedDate displays 1900-01-01 00:00:00.000 in my query when that value is in the database. I'm using SQL Server 2008 R2.
6 cze 2024 · MS SQL provides a function ISNULL to check for null values: SELECT id, name FROM Department WHERE ISNULL (code, '') = '' OR TRIM (code) = ''; The ISNULL function in MS SQL takes two arguments: the first is a value or column name, and the second is the default value if the first argument is null.
21 lip 2018 · To convert a date to a string, you use the CAST() function as follows: CAST(date AS string) Code language: SQL (Structured Query Language) (sql) In this syntax: The date can be a literal or an expression that evaluates to a DATE value. The string can be any character string data type such as VARCHAR or TEXT. The CAST() function returns a string ...
17 lis 2015 · You can't get an empty string because you're returning the DATE value type from ISNULL. Per the docs, ISNULL. Returns the same type as check_expression. If a literal NULL is provided as check_expression, returns the datatype of the replacement_value.
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;
The date function DATEDIFF accepts a date part, start date and end date as date datetime, or valid date string and returns the difference between the dates in units bast on the date part specified. Syntax: DATEDIFF (date part, start date, end date)
13 mar 2023 · In this tutorial you've learned some common date functions you will use with when working with dates in SQL. You learned how to get the current timestamp, get the current date, extract parts from a date, and how to add or subtract dates.
