sql - How does database indexing work? - Stack Overflow
Given that indexing is so important as your data set increases in size, can someone explain how indexing works at a database-agnostic level? For information on queries to index a field, check …
indexing - What is a database index? - Stack Overflow
Mar 6, 2013 · A database index also make it possible to enforce DB constraints. Many DB systems set a index on a set of columns referred to as PRIMARY KEY. Some DB systems …
indexing - What is an index in SQL? - Stack Overflow
Jun 2, 2010 · An index is used to speed up the performance of queries. It does this by reducing the number of database data pages that have to be visited/scanned. In SQL Server, a …
sql - When should I create database indexes? - Stack Overflow
When to set index for a table, during table creation or on performance tuning? What are the advantages and disadvantages of indexing?
What columns generally make good indexes? - Stack Overflow
As a follow up to "What are indexes and how can I use them to optimise queries in my database?" where I am attempting to learn about indexes, what columns are good index candidates? …
Database indexes: A good thing, a bad thing, or a waste of time?
Nov 26, 2010 · To be aware, databases/tables which are updated quite often as a part of some batch job, would suffer from indexing. Or, something like a migration on a big table, if the alter …
sql - Rebuild all indexes in a Database - Stack Overflow
Sep 10, 2015 · I have a very large SQL Server 2008 R2 database (1.5TB) and will be copying some data from column to column within the same table. I've been told that the schema has a …
What is the difference between partitioning and indexing in DB ...
Mar 25, 2021 · Thats true, and I know in most production cases, we combine indexing together with partitioning anyway, they both work together hand in hand. But my question about the …
database - how B-tree indexing works in mysql - Stack Overflow
Aug 9, 2013 · The database stores the value indexed as a B-Tree key, and the record pointer as a B-Tree value. Whenever you search for a record holding a certain value of an indexed column, …
MySQL indexes - what are the best practices? - Stack Overflow
Indexing all six columns isn't always the best practice. (a) Are you going to use any of those columns when searching for specific information? (b) What is the selectivity of those columns …