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What is Ad Hoc Query?
... just loosely type out where you need it
var newSqlQuery = "SELECT * FROM table WHERE id = " + myId;
...which is an entirely different query each time that line of code is executed, depending on the value of myId. The opposite of an ad hoc query is a predefined query such as a Stored Procedure, w...
Function to Calculate Median in SQL Server
... the 7 years since, but personally I wouldn't use this function on a large table until I verified its performance vs. other solutions.
ORIGINAL 2009 POST IS BELOW:
There are lots of ways to do this, with dramatically varying performance. Here's one particularly well-optimized solution, from Median...
When NOT to use Cassandra?
...zing log data, or any place where scanning huge, two-dimensional join-less tables is a requirement. Redis is built to provide In-Memory search for varieties of data structures like trees, queues, linked lists, etc and can be a good fit for making real-time leaderboards, pub-sub kind of system. Simil...
LIMIT 10..20 in SQL Server
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You example query runs fine but If I change the table name and order by col as below SELECT * FROM DimProduct ORDER BY ProductKey OFFSET 5 ROWS FETCH NEXT 5 ROWS ONLY It gives error Parse error at line: 4, column: 1: Incorrect syntax near 'OFFSET'
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Check if a Postgres JSON array contains a string
I have a table to store information about my rabbits. It looks like this:
4 Answers
4
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Amazon SimpleDB vs Amazon DynamoDB
...best parts of
the original Dynamo design (incremental scalability, predictable high
performance) with the best parts of SimpleDB (ease of administration
of a cloud service, consistency, and a table-based data model that is
richer than a pure key-value store).
Werner's Summary suggests Dyna...
Have bash script answer interactive prompts [duplicate]
...[yes]`
`#Skip plural name checking [no]`
`#Use logged storage [no]`
`#Sort tables and views [yes]`
`#Export only table categorized []`
`#Enhance many to many detection [yes]`
`#Skip many to many tables [yes]`
`#Bundle namespace []`
`#Entity namespace []`
`#Repository namespace []`
`#Use automatic re...
Sample random rows in dataframe
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The data.table package provides the function DT[sample(.N, M)], sampling M random rows from the data table DT.
library(data.table)
set.seed(10)
mtcars <- data.table(mtcars)
mtcars[sample(.N, 6)]
mpg cyl disp hp drat wt ...
Get generated id after insert
... @GrAnd, but what if I'll delete some "start-middle" rows in my table, so I break the sequence of n-th rows with generated id=n. Will that returned row ID remain the same as generated autoincrement id?
– UnknownJoe
Jan 28 '14 at 9:07
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Inserting a Python datetime.datetime object into MySQL
I have a date column in a MySQL table. I want to insert a datetime.datetime() object into this column. What should I be using in the execute statement?
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