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Customer.select('email, status_id, COUNT(*) AS cnt').group(:email).having('cnt > 1').update_all(:status_id => 2)
above is my ruby query that I want to convert into mysql.
Please Help me. Please save my life.
Thanks
You can just append .to_sql to the end of your call. That will give you the SQL query.
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Can anyone please tell whether it is possible to create the shared object(.so) files from the existing .cc files?
Thanks !
Yes, you should look into make.
http://www.cs.colby.edu/maxwell/courses/tutorials/maketutor/
You need to compile your object files and then create an shared object out of those.
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I have to save a variable of my bash script into my mysql database.
Any Ideas?
Use the mysql command, something like:
mysql -e "INSERT INTO tablename (colname) VALUES ('$variable')"
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i am developing a ruby on rails question bank application.i want to know how to retrive a random records from database with out any duplication.and i am using a MYSQL as a database.Also all the random records show in the view.
Solution: 1
User.limit(10).order("RAND()")
Solution: 2
ids = User.pluck(:id).shuffle[0..9]
User.where(id: ids)
Sorry about my last, i write that almost thoughtlessly.
registers = YourModel.order("RANDOM()").limit(number_of_records)
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I'm currently learning ColdFusion and it's been going well except for when I have got to trying to use databases. I can't find anywhere what so ever how to connect to a MYSQL database. Can someone tell me how it's done?
Thanks
I'm surprised if you couldn't find anything on how to connect to a MySQL datasource. Here's Adobe's list of settings to use in CF Administrator. The important part here is the name you give it.
Because then in your queries or stored procs, you use that name to reference the datasource:
<cfquery name="yourQuery" datasource="name of datasource">
<cfstoredproc procedure="yourProcedure" datasource="name of datasource">
Here's more links Google showed up:
http://www.hosting.com/support/mysql/coldfusionstring/
http://www.bluereef.net/support/extensions/database/mysql/coldfusion.html
http://www.justskins.com/forums/how-to-connect-to-130869.html
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I used gcc compiler, MySQL Server 5.0
When I use a long length string as a value to insert or update or select or delete, system doesn't work. No error comes. So I could not find the error.
A part of my code is this :
mysql_query(conn, sql);
Yes, it's possible if you use the C driver for MySQL.