Explanation of NULLIF
Syntax:
NULLIF ( expression , expression )
Returns a null value if the two specified expressions are equal. NULLIF returns the first expression if the two expressions are not equal. If the expressions are equal, NULLIF returns a null value of the type of the first expression. NULLIF is equivalent to a searched CASE function in which the two expressions are equal and the resulting expression is NULL.
There are three ways to retrieve the current datetime in SQL SERVER.
CURRENT_TIMESTAMP, GETDATE(), {fn NOW()}
One of the developers at my company asked is it possible to parse HTML and retrieve only TEXT from it without using regular expression. He wanted to remove everything between < and > and keep only Text. I found the question very interesting and quickly wrote UDF which does not use regular expression. Let us see how to parse HTML without regular expression.
I have received few emails and comments about my post SQL SERVER – T-SQL Paging Query Technique Comparison – SQL 2000 vs SQL 2005. The main question was is this can be done using CTE? Absolutely! What about Performance? It is same! Please refer above mentioned article for history of paging.
