I have a mysql table that contains field_one, field_two, field_three I want to check if field_one contains a duplicate value (like if it was unique).
So i have a question. Say you have a table requests, which represent a graph.There are 3 columns in the request table, A, B, time.A -> B At time.So what each row represents is a directed connection f
I need to assure that a value is unique in two columns (this is not a \"two columns\" index issue). Table A
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I am using this co开发者_如何学运维de to generate a 8 digit unique number. byte[] buffer = Guid.NewGuid().ToByteArray();
Hey. To start with, I have to say that this is the first time I have ever tried to write SQL, which means I\'m a n00b. Have some patience, please..
I have a proble开发者_高级运维m with validation. In Doctrine 1 i used this: if ($model->isValid()) {
The following query is showing same user for multiple times, how to make it unique? $query = \'SELECTa.connection_id, a.connect_from, a.connect_to,
There must be a better way of writing this Python code where I have a list of people (people are dictionaries) and I am trying to find the number of unique values of a certain key (in this case the ke
I would like to know how exactly I can deal with the error\'s statements returned by DataBase Drivers available in PDO class.
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