Is there an index on the primary key of a table?
73190
sql primary key and index
57207
Table and Index size in SQL Server
125265
how to set a column as unique indexer on Sqlite
8924
How do I see all foreign keys to a table or column?
46694
Foreign key referring to primary keys across multiple tables?
26537
Possible to do a MySQL foreign key to one of two possible tables?
20729
What is an index in SQL?
116979
Reorder / reset auto increment primary key
151620
Multidimensional indices in databases
10409
How To Create A 'Two-Sided' Unique Index On Two Fields?
118020
Primary key or Unique index?
128621
Mysql - Add auto_increment to primary key
33176
Can I have multiple primary keys in a single table?
151261
Does a non-clustered index make any guarantees about row order?
59139
Remove Primary Key in MySQL
1236
Auto generate an Index
47564
Foreign Key column mapped to multiple primary keys