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MySQL version 5.5 - please also tag with mysql for search purposes.

7 votes
1 answer
6k views

What is the difference between uniqe index/unique/unique key/unique constraint keywords?

I am using mysql 5.5.16 What is the difference between the following DDL statements? 1) create table sql_query ( id int not null , query_text varchar(21826) not null , query_md5 binary(1 …