where "field" is NULL OR "field" in (1) bonus: SQL and NULL and here is a thing a good SQL-developer has somewhere in the subconscious zone (the request was tested in Postgres, but I'm pretty sure it is the behavior from the standard ANSI SQL): SELECT -- simple things 1 = 1...
NULL means unknown. It's different from 0 or empty string. NOT NULL means you NEED to insert a value in there, always, even if it's a blank string or a 0. Many designers argue that's it's better design. Other see no issues with having NULL values. Different software houses will e...
Array data type in SQL server Array's IN SQL SERVER? ASCII values for extended characters Assign empty string '' if datetime is null Assign EXEC output to Variable Assigning NULL value to column name using Case Statement of where is SQL SERVER 2008 atomic if not exists() and insert ...
The SQL IS NOT NULL command is the opposite of the SQL IS NULL command. This command tests for non-empty values (NOT NULL values). Thus, it will always return all the rows in a column with a value and exclude all NULL values in the column specified in your query. SELECTFirstName, L...
SQL NOT NULL ConstraintBy default, a column can hold NULL values.The NOT NULL constraint enforces a column to NOT accept NULL values.This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding a value to this field...
Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while saving the entity changes. See the inner exception for details. ---> Npgsql.PostgresException (0x80004005): 23502: null value in column "Address_StreetName" of relation "Persons" violates not-null constraint ...
Unlike SQL which means NULL to be “perhaps coal or gas or etc or nothing”. Therefore, in my intent, NULL cannot possibly be coal or wood, so I expect IN to not return A (it does not, alright), and I expect NOT IN to return A… and it does not. ...
Hello, I've a problem with @query wich not work with empty List parameter Please see my example, it's complete. Given files : My entity package com.example.NotInQuery; import jakarta.persistence.Column; import jakarta.persistence.Entity;...
"The designers of String.Concat chose to treat null concatenation as empty string concatenation. Which means that (string)null + (string)null gives you an empty string in C#, bizarrely enough" MS SQL has the same behavior if you SET CONCAT_NULL_YIELDS_NULL OFF which happened to have burned...
this is incompatible with sql_mode=only_full_group_byHow to repeat:CREATE TABLE `aa` ( `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT, `is_deleted` tinyint(4) NOT NULL DEFAULT '0' , `balance` decimal(12,2) NOT NULL DEFAULT '0.00' , PRIMARY KEY (`id`) ); CREATE TABLE `aa1...