How to check for duplicates when savi开发者_运维技巧ng new object? Scenario: check for duplicates by some query -> when no duplicates perform saving
I have to make one of the foreign keys unique. The problem is, I am getting the f开发者_开发知识库ollowing message from the phpMyAdmin:
I have seen a few post on this, but nothing that would work entirely for what I\'m trying to do. Pretty much I want to generate a new id for clients in this 开发者_运维技巧script. What I want to do is
How would someone go on counting the number of unique items in a list? For example say I have {1, 3, 3, 4, 1, 3} and I want to get the number 3 which represent the number of unique items in the list(
i have table with unique field uniq_field. what method adding is better- first ch开发者_开发技巧eck if record with unique value exists or simply add record and mysql will check by himself?it depends o
I have multiple CodeCoverage.xml files in seperate directories and I want to copy them to a single directory with new names so that they don\'t get overwritten.
I know this question has been asked lots of times, but I am not asking how to remove duplicate elements from a list only, I want to remove the duplicated element as well.
I have an array of arrays, like so: [[\'1\',\'2\'],[\'a\',\'b\'],[\'x\',\'y\']] I need to combine those arrays into a string containing all possible combinations of all three sets, forward only. I
This is a Javascript / jQuery question: I\'m trying to generate six unique random numbers between 1 and 21 (no duplicates), using the jQuery.inArray method. Those six numbers will then be used to sel
I have a model in my django project called \"change\" and it 开发者_运维技巧has a field called \"change_type\". There are multiple values within the change_type field to include \"move\", \"new\", \"e
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