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24 sty 2013 · A column can only return one data type - DATETIME != string/VARCHAR. If you want a zero length string in the event of the value being NULL, you have to explicitly change the data type, using CAST/CONVERT to change the non-NULL value to a VARCHAR/etc data type.
24 paź 2014 · The simplest line of code I've found for what you're trying to accomplish is as follows. ISNULL(CONVERT(VARCHAR(30),us.Date,121),'') as USDate, ISNULL(CONVERT(VARCHAR(30),au.Date,121),'') as AUDate, I have tested this and verified that it works. answered Jul 28, 2016 at 16:09.
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
11 lip 2012 · Yes - I did try CASE WHEN (ID IS NULL) THEN 'YES' ELSE 'NO' END AS ID_Value But I am looking for some other better approach something like IF(ID IS NULL, 'YES', 'NO') AS ID_Value in the Ms Sql, so that everything can be in a single line. Any suggestions please –
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 ...
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.
27 lut 2007 · My problem is with dates. Since there is no such thing as a 'blank' date field, I have to allow nulls on date columns. Using some arbitrary default (01/01/1900) is unacceptable since this could...
