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New posts in unique-index

How to partition MySQL table by column that is not in the unique index

How to Create Unique Index for Existing table in MySQL which contains Records

Add constraint to make column unique per group of rows

Advantage of a unique index in MongoDB

What is the purpose of non unique indexes in a database?

SQL Server Unique Index across tables

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Check whether a field has the property `UNIQUE` in mysql and PHP

How does PostgreSQL enforce the UNIQUE constraint / what type of index does it use?

Behavior of unique index, varchar column and (blank) spaces

Rails uniqueness constraint and matching db unique index for null column

how to set a column as unique indexer on Sqlite

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Removing duplicates with unique index

Unique Constraint vs Unique Index

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Short unique id in php

Unable to create index because of duplicate that doesn't exist?