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Master-master vs master-slave database architecture?
...uture. I came across
Master-Slave Replication
Master-Master Replication
MySQL Cluster
I have decided to settle for using MySQL Cluster for my use case. However please see below for the various pros and cons that I have compiled
1. Master-Slave Replication
Pros
Analytic applications can rea...
Using LIMIT within GROUP BY to get N results per group?
... behavior of both quirks is not guaranteed. Revised answer as follows.
In MySQL 5.x you can use poor man's rank over partition to achieve desired result. Just outer join the table with itself and for each row, count the number of rows lesser than it. In the above case, lesser row is the one with hi...
How do I get a raw, compiled SQL query from a SQLAlchemy expression?
...o %s or other variables waiting to be bound by the statement compiler or MySQLdb dialect engine, etc).
12 Answers
...
SQL UPDATE all values in a field with appended string CONCAT not working
...
That's pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(d...
MySQL select with CONCAT condition
....new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f5734570%2fmysql-select-with-concat-condition%23new-answer', 'question_page');
}
);
Post as a guest
...
How do I pass JavaScript variables to PHP?
... <?php
$query = "SELECT * FROM salarie";
$result = mysql_query($query);
if ($result) :
?>
<select id="salarieids" name="salarieid">
<?php
while ($row = mysql_fetch_assoc($result)) {
echo '<option val...
Best approach for designing F# libraries for use from both F# and C#
...tten in a functional style (using F# function types, tuples, discriminated unions etc.)
.NET library is designed to be used from any .NET language (including C# and F#) and it typically follows .NET object-oriented style. This means that you'll expose most of the functionality as classes with method...
SQL query to group by day
... (from Q8-Coder):
GROUP BY dateadd(DAY,0, datediff(day,0, created))
For MySQL:
GROUP BY year(datefield), month(datefield), day(datefield)
or better (from Jon Bright):
GROUP BY date(datefield)
For Oracle:
GROUP BY to_char(datefield, 'yyyy-mm-dd')
or faster (from IronGoofy):
GROUP BY trun...
GROUP_CONCAT ORDER BY
...
@aleroot, Is this query MySQL specific?
– Pacerier
Apr 30 '15 at 20:24
...
How to do 3 table JOIN in UPDATE query?
...need a visual aid to get your joins correct: browse-tutorials.com/tutorial/mysql-joins-visual-representation
– ram4nd
Jan 27 '17 at 9:29
...