I have two mysql tables: TableA has 10,000 records TableB has 2,000 records. I want to copy the 8,000 u开发者_StackOverflow中文版nique records from TableA into TableB ignoring the 2,000 in TableB whi
I have an array of numbers that I need to make sure are unique. I found the code snippet below on the internet and it works great until the array has a zero in it. I found this other script here on St
i am trying to ensure that the username is unique when registering but im not sure how to do this I\'ve tried:
I\'ve got the following query: select * from members,subscriptions where members.MemberID = subscriptions.MemberID
I have a list of strings, I need to be able to simply probe if a new string is in the table or not. When the list is large, te开发者_运维问答sting a simple list directly is pretty inefficient... so ty
Hello all you amazing people I wanted to do two things populate a unique distinct list from a long list of repetitive values
This is a math problem, but I\'m sure this must come up in some programming scenarios, at least I hope so, and I was wondering if there was a name for this type of situation:
Consider the following situation: - Suppose my app allows users to create the states / provinces in their
Update: Currently looking into NSSET\'s minusSet links: Comparing Two Arrays Hi guys, Could benefit from your wisdom here..
Let\'s say we are having a table with this definition: range ( id bigint primary key, colourId int references colour(id),
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