How to design table with primary key, index, unique in SQL
89082
Surrogate vs. natural/business keys
50167
Is there any reason for an index to contain the primary key?
118170
SQL -- How is DISTINCT so fast without an index?
34609
How can I define a composite primary key in SQL?
134706
Table Scan and Index Scan in SQL
157436
how to store multiple value in column in sql server
49426
Best design for a tree-like structure database
153310
Composite primary key from multiple tables / multiple foreign keys
16236
Is it possible to enforce unique values in a column, excluding nulls?
107391
SQL - many-to-many table primary key
39449
Database Design Best Practices
108071
Find unique columns and column membership
66985
Is there a name for this database schema of key values?
35823
How to create SQL like composite key
144902
Unique keys in Entity Framework 4
144686
Database design: Best table structure for capturing the User/Friend relationship?
154063
Database design help. many-to-many relationship