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] …
What is the difference between NOT and != operators in SQL?
May 6, 2017 · Secondly, of course the original asker didn't mean to compare NOT with !=, but rather the difference between NOT a = b vs. a != b. And intuitively there should be a …
Should I use != or <> for not equal in T-SQL? - Stack Overflow
I have seen SQL that uses both != and <> for not equal. What is the preferred syntax and why? I like !=, because <> reminds me of Visual Basic.
mysql - SQL WHERE condition is not equal to? - Stack Overflow
May 27, 2011 · DELETE FROM table WHERE id <> 2 As @Frank Schmitt noted, you might want to be careful about the NULL values too. If you want to delete everything which is not 2 …
sql - How to use NOT in Where Clause? - Stack Overflow
Nov 1, 2011 · what is the difference between if i wrote the NOT query in the following ways. SELECT iBatchID,COUNT(*) FROM #temp WHERE NOT iBatchID IN (1) GROUP BY …
sql - Not equal <> != operator on NULL - Stack Overflow
Apr 14, 2011 · 437 <> is Standard SQL-92; != is its equivalent. Both evaluate for values, which NULL is not -- NULL is a placeholder to say there is the absence of a value. Which is why you …
sql server 2008 - SQL query with NOT LIKE IN - Stack Overflow
Please help me to write an SQL query with the condition as NOT LIKE IN.
SQL query question: SELECT ... NOT IN - Stack Overflow
I am sure making a silly mistake but I can't figure what: In SQL Server 2005 I am trying select all customers except those who have made a reservation before 2 AM. When I run this query: …
sql - MySQL "NOT IN" query - Stack Overflow
NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL in MySQL MySQL, as well as all other systems except SQL Server, is able to optimize LEFT JOIN / IS NULL to return FALSE as …
How to write "not in ()" sql query using join - Stack Overflow
Apr 14, 2012 · Could some one please provide how to write following sql query using joins. I do not want use not in as well as if possible I would like to replace where condition as well.