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SQL MAX of multiple columns?
...8.1.
– Frozen Flame
Nov 10 '15 at 9:51
4
Doesn't handle NULL's well, but if you coalesce(col1, 0)...
Escaping quotes and double quotes
...o escape.) If you want to work with the output, you may want to add the -NoNewWindow switch.
BTW: this was so important issue that since v3 you can use --% to stop the PowerShell parser from doing anything with your parameters:
\\server\toto.exe --% -batch=b -param="sort1;paramtxt='Security ID=123...
Copying PostgreSQL database to another server
...
Then copy the backup to your development server, restore with:
psql the_new_dev_db < the_backup.sql
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When should I use h:outputLink instead of h:commandLink?
...l = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
...
Access denied for user 'test'@'localhost' (using password: YES) except root user
...TO 'user'@'localhost' IDENTIFIED BY 'password';
This statement creates a new user and grants selected privileges to it.
I.E.:
GRANT INSERT, SELECT, DELETE, UPDATE ON database.* TO 'user'@'localhost' IDENTIFIED BY 'password';
Take a look at the docs to see all privileges detailed
EDIT: you can ...
SQL Server : Columns to Rows
...
Just to help new readers, I've created an example to better understand @bluefeet's answer about UNPIVOT.
SELECT id
,entityId
,indicatorname
,indicatorvalue
FROM (VALUES
(1, 1, 'Value of Indicator 1 for ...
URLs: Dash vs. Underscore [closed]
...ty?
– billjamesdev
Dec 19 '17 at 22:51
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How to sort git tags by version string order of form rc-X.Y.Z.W?
...As noted by Leo Galleguillos in the comments:
To configure Git to show newest tags first (descending order), just add a hyphen before version.
The command becomes:
git config --global tag.sort -version:refname
With Git 2.4 (Q2 2015), the versionsort.prerelease configuration variable can...
How do I make a column unique and index it in a Ruby on Rails migration?
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If you are creating a new table, you can use the inline shortcut:
def change
create_table :posts do |t|
t.string :title, null: false, index: { unique: true }
t.timestamps
end
end
...
What is the difference between up-casting and down-casting with respect to class variable
...n two classes.
Downcasting would be something like this:
Animal animal = new Dog();
Dog castedDog = (Dog) animal;
Basically what you're doing is telling the compiler that you know what the runtime type of the object really is. The compiler will allow the conversion, but will still insert a runti...