sql - Not equal <> != operator on NULL - Stack Overflow
Apr 14, 2011 · 11 In SQL, anything you evaluate / compute with NULL results into UNKNOWN This is why SELECT * FROM MyTable WHERE MyColumn != NULL or SELECT * FROM …
What does <> (angle brackets) mean in MS-SQL Server?
Nov 8, 2013 · What does <> (angle brackets) mean in MS-SQL Server? Asked 11 years, 8 months ago Modified 3 years, 10 months ago Viewed 80k times
Should I use != or <> for not equal in T-SQL? - Stack Overflow
Apr 6, 2009 · Yes; Microsoft themselves recommend using <> over != specifically for ANSI compliance, e.g. in Microsoft Press training kit for 70-461 exam, "Querying Microsoft SQL …
What does the "@" symbol do in SQL? - Stack Overflow
The @CustID means it's a parameter that you will supply a value for later in your code. This is the best way of protecting against SQL injection. Create your query using parameters, rather than …
Newest 'sql' Questions - Stack Overflow
How can I convert this loop-based SQL Server billing logic to a set-based approach? I'm working on optimizing a SQL Server procedure that currently relies on a WHILE loop to process billing …
sql server 2008 - SQL query with NOT LIKE IN - Stack Overflow
May 22, 2023 · SQL query with NOT LIKE IN Asked 13 years, 5 months ago Modified 2 years, 2 months ago Viewed 560k times
sql - NOT IN vs NOT EXISTS - Stack Overflow
Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind..Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind..[Order Details] …
sql - When should I use CROSS APPLY over INNER JOIN? - Stack …
SQL Server CROSS APPLY and OUTER APPLY over JOINS As suggested in this article, there is no performance difference between them for normal join operations (INNER AND CROSS).
What's the difference between INNER JOIN, LEFT JOIN, RIGHT …
An SQL JOIN clause is used to combine rows from two or more tables, based on a common field between them. There are different types of joins available in SQL: INNER JOIN: returns rows …
SQL Server tables: what is the difference between @, # and
Feb 8, 2010 · In SQL Server, what is the difference between a @ table, a # table and a ## table?