Need to create a primary key by the combination of 4 fields to determine a price
100207
Need to create a combination of fields to be the primary key to determine price for a product
88569
Increment value based on grouped field
129426
Table doesn't have a primary key
44786
Primary key for link/junction table with time-dependent data
9555
MySQL how to join tables on two fields
58229
Is a table without a primary key normalized?
101193
Auto Increment Number Based on Another Field
74726
How can I add a foreign key when creating a new table?
47564
Foreign Key column mapped to multiple primary keys
55545
Find the Foreign Keys Associated with a Given Primary Key
139969
How to represent it with UNIQUE indexes and foreign keys?
103208
How to prevent creation of records where the value of two fields is the same?
156303
Performing Inner Join for Multiple Columns in the Same Table
78159
Struggling to create an efficient index for this query
55676
SQL distinct for 2 fields in a database
64024
Strings as Primary Keys in SQL Database
33215
create a map with keys = fields names and values = query result