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Get records with max value for each group of grouped SQL results
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There's a super-simple way to do this in mysql:
select *
from (select * from mytable order by `Group`, age desc, Person) x
group by `Group`
This works because in mysql you're allowed to not aggregate non-group-by columns, in which case mysql just returns the first r...
How to select unique records by SQL
...Your data seems to indicate the minimum data value so in this instance for SQL Server.
SELECT item, min(data)
FROM table
GROUP BY item
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Turning a Comma Separated string into individual rows
I have a SQL Table like this:
16 Answers
16
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What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
...nce between INNER JOIN , LEFT JOIN , RIGHT JOIN and FULL JOIN
in MySQL ?
3 Answers
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What's the hardest or most misunderstood aspect of LINQ? [closed]
...a mistaken impression of. I won't be specifically talking about LINQ to SQL or the Entity Framework except as examples of how queries can be executed remotely using expression trees (and usually IQueryable ).
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SQL function as default parameter value?
...ET @currentDate = COALESCE(@currentDate,GETDATE())
– SQLMenace
Jan 22 '09 at 20:32
I was using that previously. "I was...
Insert text with single quotes in PostgreSQL
...uotes or multiple layers of escaping, you can avoid quoting hell in PostgreSQL with dollar-quoted strings:
'escape '' with '''''
$$escape ' with ''$$
To further avoid confusion among dollar-quotes, add a unique token to each pair:
$token$escape ' with ''$token$
Which can be nested any number of...
How do I escape a percentage sign in T-SQL?
... too: [_]. How do you escape the open square bracket then? Like this: [[]. sqlserver2000.databases.aspfaq.com/…
– Csaba Toth
Apr 3 '14 at 18:25
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How to Store Historical Data
...our historical model. The Create / Update logic is handled in an Oracle PL/SQL package so you simply pass the function the current ID, your user ID and the new XML data and internally it does all the updating / inserting of rows to represent that in the historical model. The start and end times indi...
Removing leading zeroes from a field in a SQL statement
I am working on a SQL query that reads from a SQLServer database to produce an extract file. One of the requirements to remove the leading zeroes from a particular field, which is a simple VARCHAR(10) field. So, for example, if the field contains '00001A', the SELECT statement needs to return the...