How to generate unique number of 12 digits?

I\'m working on an app that sends raw data to zebra printer and print out barcodes. And since every item has its own unique barcode, I need to define a variable that automatically generates unique num

add schema to path in postgresql

I\'m the process of moving applications over from all in the public schema to each having their own schema.for each application, I have a small script that will create the 开发者_Go百科schema and then

Can I have a set containing identical elements?

It is convenient for me to use a set. I like how I can \"add\" (\"remove\") an element to (from) t开发者_开发知识库he set. It is also convenient to check if a given element is in the set.

Check For Duplicate Records VS try/catch Unique Key Constraint

I have a database table that has a Unique Key constraint defined to avoid duplicate records from occurring.

MySQL: Unique constraint on multiple fields [duplicate]

This question already has answers here: How do I specify unique constraint for multiple columns in MySQL?

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How do I guarantee row uniqueness in MySQL without the use of a UNIQUE constraint?

I have some fairly simple requirements but I\'m not sure how I implement them: I have multi开发者_如何转开发ple concurrent threads running the same query

Python - Why use anything other than uuid4() for unique strings?

I see quit a few implementations of unique string generation for things like uploaded image names, session IDs, et al, and many of them employ the usage of hashes like SHA1, or others.

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Adding Web Part with Stapling Feature

I have a problem adding web part to a blog default.aspx with stapling Feature. this is my code: try { SPWeb web = (SPWeb)properties.Feature.Parent;