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Counting DISTINCT over multiple columns
...INCT concat(DocumentId, DocumentSessionId)) FROM DocumentOutputItems;
In MySQL you can do the same thing without the concatenation step as follows:
SELECT count(DISTINCT DocumentId, DocumentSessionId) FROM DocumentOutputItems;
This feature is mentioned in the MySQL documentation:
http://dev.my...
What is the difference between a schema and a table and a database?
...ction of tables. A DBMS (Database Management System) is the software (like MySQL, SQL Server, Oracle, etc) that manages and runs a database.
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How to drop all user tables?
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Being new to Oracle and I'm more familiar with MySQL; reseting a DB seems difficult. IN MySQL a USER is separate to a DATABASE. DROP USER username CASCADE worked for me. But in MySQL all I would have to do is DROP DATABASE and create a new one
– gawp...
Find location of a removable SD card
...ally 'contact the manufacturer'. Not useful.
– dragonroot
Mar 15 '12 at 2:05
6
The last part of t...
git rebase without changing commit timestamps
...so work with:
interactive rebase (rebase -i/rebase --interactive)
for the root commit (git rebase --root)
See "Change timestamps while rebasing git branch".
(Original answer, June 2012)
You could try, for a non-interactive rebase
(see just above: with Git 2.29, Q4 2020, that will work with an int...
苦逼的年轻人和年薪百万的区别到底在哪里？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...进录取率极低的计算机科学学院，学弟学妹组队求经验，如何管住自己刻苦学习，他说不出来，我教他，“你当时一天自习七小时，为保证自己避过食堂高峰期，六点前吃饱入座，带一袋牛肉干，防止后期因为饥饿影响效率，是...
Force SSL/https using .htaccess and mod_rewrite
...e rest. However, on the HTTPS pages, there are forms that submit to my web root. The form specifies the action url as HTTPS. However, since the web root isn't one of those pages that are specified to force HTTPS, my .htaccess then forces a redirect -- which means the POST variables are lost. How do ...
How do I UPDATE from a SELECT in SQL Server?
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@CharlesWood yeah. I have the same question in MySQL. It would be great if someone knows how to implement it to MySQL and share with everyone. I'm sure lots of people are looking for a MySQL version solution
– Roger Ray
Nov 27 '13 at...
How to implement LIMIT with SQL Server?
I have this query with MySQL:
18 Answers
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What is the equivalent of 'describe table' in SQL Server?
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I like this because it works on MySQL too, so I don't have to change my SQL in my code
– Abdul
Sep 1 '15 at 2:14
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