All versions of MySQL (not Microsoft SQL Server). Please also add a version-specific tag like mysql-5.7 if that is relevant to the question.

learn more… | top users | synonyms

1
vote
1answer
120 views
+50

Efficient workflow/queries to save unique information?

I am saving company information in a database. There is a single table with an auto-incrementing key that is unique to each company. There are separate tables for emails, websites, phone numbers, and ...
1
vote
0answers
32 views
+250

MySQL Online DDL Index Creation

I have a table with 25 million records and 10 columns on which I am trying to create indexes. According to the following documentation no table copy should occur but when I monitor disk usage it is ...
3
votes
0answers
49 views
+50

MySQL locking in Duplicate Key Error

From the docs: If a duplicate-key error occurs, a shared lock on the duplicate index record is set. This use of a shared lock can result in deadlock should there be multiple sessions trying to ...