My question is, is there any difference between a NULL and a Blank (Unknown, Not Applicable) field in MS SQL or are they the same? Awaiting your comments, Regards Yes, a very big difference! Be carefully if you have NULL valued fields. If you do a compare and one or both are NULL...
select * from t1 where exists (select null from t2 where t2.x=t1.x and t2.y>t1.y and t2.z like '℅' || t1.z || '℅' ) ; And on a different note - The allegedly performance and technical differences between EXISTS and IN may result from specific vendor's implementations/lim...
Understanding the difference between “IS NULL” and “= NULL” When a variable is created in SQL with the declare statement it is created with no data and stored in the variable table (vtable) inside SQLs memory space. The vtable contains the name and memory address of the variable. Howev...
SQL Vs. NoSQL: In this tutorial, we will learn about SQL and NoSQL, and the differences between SQL and NoSQL. By Bharti Parmar Last updated : May 27, 2023 What Is SQL (Structured Query Language)?SQL stands for Structural Query Language, used to retrieve data from the database. ...
One command to both INSERT new data and UPDATE existing records in your database towardsdatascience.com4. What is the difference with joins? I think of JOIN's as combining columns from two or more tables data sets using a related column between them. The UNION, INTERSECT and EXCEPT operator...
DIFFERENCE BETWEEN "INSERT INTO" AND UNION IN SQL difference between (WITH [tablename] AS) and (DECLARE @[tablename] TABLE) Difference between APP_NAME() and PROGRAM_NAME() difference between char(13) and char(10) Difference Between DB Log File and Transaction log file Difference between ...
If@val= NULL print 'True' else print 'False' SET@val= NULL If@val= NULL print 'True' else print 'False' When 'ON', both tests return 'False'. When 'OFF', both tests return 'True'. This is the case for both SQL 7 and 2000. Try it for yourselves!
My question is, is there any difference between a NULL and a Blank field in MS SQL or are they the same? I have faced some problems while retrieving the records from the database.How to overcome... Any one help Thanks Shameer Chandra...
In this article, we will discuss the differences between SQL and MySQL. Most of us will have a basic idea of SQL and MySQL, but in order to bring everyone on the same page, let us first understand what SQL is and what MySQL is. ...
Here are 4 examples illustrating when you would use IF EXISTS and when you would use IF NOT ...