2025-05-26
425 reads
NULL
What does SQL NULL mean and how to handle NULL values
This tip will help you understand what NULL means and different ways to handle NULL values when working with SQL Server data.
2024-07-08
Working with NULL Values in SQL
In SQL and relational databases, NULL values are an important part of managing data and information stored in SQL tables. A NULL value is used as a placeholder for missing values or values that are unknown in a database column or cell.
2023-09-11
2023-02-17
602 reads
2023-02-06 (first published: 2023-02-03)
512 reads
2023-02-06 (first published: 2023-01-23)
743 reads
Missing Data
Missing data is a difficult and common problem to solve. In this article, Joe Celko explains several approaches to deleting or replacing missing data.
2018-07-04
2,461 reads
2017-09-11
1,311 reads
2016-09-26
1,437 reads
2016-02-17
1,693 reads
Blogs
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Forums
Restoring On Top II
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SQL Art 2: St Patrick’s Day in SSMS (Shamrock + Pint + Pixel Text)
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Breaking Down Your Work
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Question of the Day
Restoring On Top II
I have a database, DNRTest, that has a number of tables and other objects in it. The other day, I was trying to mock up a test and ran this code on the same server:
-- run yesterday CREATE DATABASE DNRTest2 GO USE DNRTest2 GO CREATE TABLE NewTable (id INT) GOToday, I realize that I need a copy of DNRTest for another mockup, and I run this:
-- run today USE Master BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak' GO RESTORE DATABASE DNRTest2 FROM DISK = 'dnrtest.bak' WITH REPLACEWhat happens? See possible answers