GitHub

is Null-Not NuLL.sql

IS NULL ve IS NOT NULL, Boolean operatorleridir. Bİr ifadenin NULL olup olmadığını kontrol eder COALESCE (Birleştirme) ise bir fonksiyondur ve içerisindeki parametrelerden NULL olmayan ilk ifadeyi ...
IEEE

Handling Null Values in SQL Queries on Relational Databases

Abstract: The lack of information within relational databases expressed as NULL values presents a problem in ensuring the quality of data and the information retrieved by SQL queries. This is so ...
GitHub

Aula 1 - Atividade 05 - Operadores IS NULL e NOT NULL.sql

A Fokus solicitou que filtrássemos apenas as pessoas que têm NULL (NULO) na DataTermino, ou seja, pessoas que atualmente ocupam o cargo listado na nossa tabela. Como podemos fazer filtrar apenas as ...
Simon Fraser University

IS condition

IS NULL and IS MISSING are predicates that test for a missing value. IS NULL and IS MISSING are used in the WHERE, ON, and HAVING expressions. Each predicate resolves to true if the sql-expression's ...