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How to get record created today by rails activerecord?
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MySQL:
Model.all :condition => ["DATE(created_at) = ?", Date.today] # rails 2
Model.where("DATE(created_at) = ?", Date.today) # rails 3
PostgreSQL:
Model.all :condition => ["created_at::date = ?", Date.today] # rail...
How to delete/create databases in Neo4j?
...to create/delete different databases in the graph database Neo4j like in MySQL? Or, at least, how to delete all nodes and relationships of an existing graph to get a clean setup for tests, e.g., using shell commands similar to rmrel or rm ?
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Run a string as a command within a Bash script
...g minus two parameters so I ended up with something like:
my_exe ()
{
mysql -sN -e "select $1 from heat.stack where heat.stack.name=\"$2\";"
}
This is something I use to monitor openstack heat stack creation. In this case I expect two conditions, an action 'CREATE' and a status 'COMPLETE' on ...
Repeat command automatically in Linux
...rs that are part of the command that you are watching, for example: watch mysql dbname -e \"show processlist\;\"
– pfrenssen
Oct 9 '13 at 11:43
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How do you open an SDF file (SQL Server Compact Edition)? [closed]
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Download and install LINQPad, it works for SQL Server, MySQL, SQLite and also SDF (SQL CE 4.0).
Steps for open SDF Files:
Click Add Connection
Select Build data context automatically and Default (LINQ to SQL), then Next.
Under Provider choose SQL CE 4.0.
Under Database with At...
What is the difference between “Flush Magento Cache” and “Flush Cache Storage” in magento's cache ma
...y the columns of a table (add or remove column) because magento executes a mysql DESCRIBE query and then saves the result in cache.
This cache is not cleared if you only click on "Flush Magento Cache" button.
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How to delete all the rows in a table using Eloquent?
... use Model::truncate() if you disable foreign_key_checks (I assume you use MySQL).
DB::statement("SET foreign_key_checks=0");
Model::truncate();
DB::statement("SET foreign_key_checks=1");
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How can I get column names from a table in Oracle?
... this question works better as a general one. (I came here looking for the mySQL one.)
– icedwater
Feb 17 '14 at 6:02
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How can I compare two dates in PHP?
...ould'nt do this with PHP.
A database should know, what day is today.( use MySQL->NOW() for example ), so it will be very easy to compare within the Query and return the result, without any problems depending on the used Date-Types
SELECT IF(expireDate < NOW(),TRUE,FALSE) as isExpired FROM ta...
postgresql - sql - count of `true` values
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In MySQL, you can do this as well:
SELECT count(*) AS total
, sum(myCol) AS countTrue --yes, you can add TRUEs as TRUE=1 and FALSE=0 !!
FROM yourTable
;
I think that in Postgres, this works:
SELECT count(*) AS total
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