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How do I (or can I) SELECT DISTINCT on multiple columns?
...T DISTINCT a,b,c FROM t
is roughly equivalent to:
SELECT a,b,c FROM t GROUP BY a,b,c
It's a good idea to get used to the GROUP BY syntax, as it's more powerful.
For your query, I'd do it like this:
UPDATE sales
SET status='ACTIVE'
WHERE id IN
(
SELECT id
FROM sales S
INNER JOI...
Cannot read configuration file due to insufficient permissions
...ot access and read web.config file.
Make the file accessible to IIS_IUSRS group. Just right click web.config and click properties, under security tab, add IIS_IUSRS.
So what is this IIS_IUSRS thing?
Your web site is like an exe file. Just like any exe file, it should be started by a user and it r...
Git hook to send email notification on repo changes
...answer is combination of Service Hook->Email @ GitHub && Google groups
First login to your google account
Go to Google Groups and at the top click on Create Group
Type in Group Name, Group email address (will copy/paste into GitHub
Service Hook->Email Address), Group description
Afte...
LINQ's Distinct() on a particular property
...es999: If you're only doing this in a single place, ever, then sure, using GroupBy is simpler. If you need it in more than one place, it's much cleaner (IMO) to encapsulate the intention.
– Jon Skeet
Feb 19 '13 at 17:29
...
Include headers when using SELECT INTO OUTFILE?
...Here's how to get column list of table my_table in my_schema.
-- override GROUP_CONCAT limit of 1024 characters to avoid a truncated result
set session group_concat_max_len = 1000000;
select GROUP_CONCAT(CONCAT("'",COLUMN_NAME,"'"))
from INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'my_table'
AND...
SQLiteDatabase.query method
...
Where does Limit/offset fall into in this... group by? having? orderby?
– Lion789
Mar 28 '14 at 20:53
...
Android getting value from selected radiobutton
I have a piece of code with three RadioButton s within a RadioGroup . I want to set an onCheckedListener that will show the value of the RadioButton in a Toast . However what I have gotten so far is not working. How do I get the value of the RadioButton and display it in a Toast ? This is ...
Vim Regex Capture Groups [bau -> byau : ceu -> cyeu]
...
If you don't want to escape the capturing groups with backslashes (this is what you've missed), prepend \v to turn Vim's regular expression engine into very magic mode:
:%s/\v(\w)(\w\w)/\1y\2/g
...
Get top 1 row of each group
I have a table which I want to get the latest entry for each group. Here's the table:
20 Answers
...
Postgresql aggregate array
...) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the columns on SELECT to GROUP BY, e.g. you don't need to repeat the student name on GROUP BY. You can merely GROUP BY on primary key. If you...