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Psql list all tables
...This is where the INFORMATION_SCHEMA comes to the rescue. To list tables:
SELECT table_name FROM information_schema.tables WHERE table_schema = 'public';
BTW, if you ever want to see what psql is doing in response to a backslash command, run psql with the -E flag. eg:
$ psql -E regress
regre...
LINQ To Entities does not recognize the method Last. Really?
...e fact that eventually it has to translate that query to SQL and SQL has a SELECT TOP (in T-SQL) but not a SELECT BOTTOM (no such thing).
There is an easy way around it though, just order descending and then do a First(), which is what you did.
EDIT:
Other providers will possibly have different im...
MySQL get the date n days ago as a timestamp
...
DATE_SUB will do part of it depending on what you want
mysql> SELECT DATE_SUB(NOW(), INTERVAL 30 day);
2009-06-07 21:55:09
mysql> SELECT TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
2009-06-07 21:55:09
mysql> SELECT UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
1244433347
...
Ways to save enums in database
...ering the cards by the numerical value of the enumeration is meaningless:
SELECT Suit FROM Cards
ORDER BY SuitID; --where SuitID is integer value(4,1,3,2,0)
Suit
------
Spade
Heart
Diamond
Club
Unknown
That's not the order we want - we want them in enumeration order:
SELECT Suit FROM Cards
ORDE...
LINQ to SQL: Multiple joins ON multiple Columns. Is this possible?
... from child in context.Childs
where child.Parent.col2 == 4
select new
{
childCol1 = child.col1,
parentCol1 = child.Parent.col1,
};
will generate the query
SELECT [t0].[col1] AS [childCol1], [t1].[col1] AS [parentCol1]
FROM [dbo].[Child] AS [...
How do I create a new class in IntelliJ without using the mouse?
...with arrow keys, then press Alt+Insert.
Another useful shortcut is View | Select In (Alt+F1), Project (1), then Alt+Insert to create a class near the existing one or use arrow keys to navigate through the packages.
And yet another way is to just type the class name in the existing code where you w...
Using TortoiseSVN via the command line
...ssociated with it. But on the installer (of version 1.7 and later) you can select the "command line client tools" option so you can call svn commands (like svn commit and svn update) from the command line.
Here's a screenshot of the "command line client tools" option in the installer, you need to m...
Error during installing HAXM, VT-X not working
...this, restart the computer, when the computer started then press Esc, then select the F2 if the manufacturer is dell.
Even if you have enabled the Virtualization (VT) in BIOS settings, some antivirus options prevent HAXM installation.
For example: In Avast antivirus under Settings (parameters) tab ...
“inconsistent use of tabs and spaces in indentation”
...
With the IDLE editor you can use this:
Menu Edit → Select All
Menu Format → Untabify Region
Assuming your editor has replaced 8 spaces with a tab, enter 8 into the input box.
Hit select, and it fixes the entire document.
...
CSS last-child selector: select last-element of specific class, not last child inside of parent?
I want to select #com19 ?
6 Answers
6
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