Logical operators ("and", "or") in Windows batch - Stack Overflow
Jan 26, 2010 · Note that this answer is tailored toward cmd batch language, the one found in Windows. You mention "DOS batch" but, based on several points, I think the former choice is …
英语中表达并列，and前加不加逗号？ - 知乎
Mar 22, 2016 · 这个用在and和or前面、有三者及以上并列时的逗号叫做 serial comma，或者series comma、 Oxford comma 、 Harvard comma。 基本原则 简单来说，加不加这个逗号，主要 …
What does ** (double star/asterisk) and * (star/asterisk) do for ...
Aug 31, 2008 · See What do ** (double star/asterisk) and * (star/asterisk) mean in a function call? for the complementary question about arguments.
Can I get "&&" or "-and" to work in PowerShell? - Stack Overflow
Original Question && is notoriously hard to search for on Google Search, but the best I've found is this article which says to use -and. Unfortunately it doesn't give any more information, and I …
java - && (AND) and || (OR) in IF statements - Stack Overflow
Java has 5 different boolean compare operators: &, &&, |, ||, ^ & and && are "and" operators, | and || "or" operators, ^ is "xor" The single ones will check every parameter, regardless of the …
An "and" operator for an "if" statement in Bash - Stack Overflow
-a has duplicity. When used with the Bourne shell style test command, a.k.a. [, the it means and. When used as a conditional expression then it is testing to see if a file exists. Yes it is …
What is the difference between the | and || or operators?
Aug 29, 2008 · I have always used || (two pipes) in OR expressions, both in C# and PHP. Occasionally I see a single pipe used: |. What is the difference between those two usages? …
python - Difference between using ' and "? - Stack Overflow
Oct 9, 2018 · Possible Duplicates: Difference between the use of double quote and quotes in python Single quotes vs. double quotes in Python So I am now learning python, and was …
sql - NOT IN vs NOT EXISTS - Stack Overflow
May 18, 2007 · Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind..Products p WHERE NOT EXISTS ( SELECT 1 FROM …
How to check for Is not Null And Is not Empty string in SQL server?
Dec 28, 2011 · How can we check in a SQL Server WHERE condition whether the column is not null and not the empty string ('')?