Frozenverse/notes
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Vault sync: 2021-10-26 17:31:42

Browse Source
This commit is contained in:
Nick Leeman 2021-10-26 17:31:42 +02:00
parent 964292920e
commit cd053285d3
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
School/Development/Foreign Key.md
View File

@ -2,11 +2,11 @@
A Foreign key is a [[Constraint]] that protects links between tables. Foreign key is a attribute or attributes that link to the [[Primary Key]] of a other entity set (table). A Foreign key is a [[Constraint]] that protects links between tables. Foreign key is a attribute or attributes that link to the [[Primary Key]] of a other entity set (table).
## Example ## Example
Authors
|ID (PK)|Name|Age|Sex|Length| |ID (PK)|Name|Age|Sex|Length|
|-----|-----|-----|-----|-----| |-----|-----|-----|-----|-----|
|1|Nick|21|M|190| |1|Nick|21|M|190|
Authors
|ID (PK)|Job|Age|Sex|Length| |ID (PK)|Job|Age|Sex|Length|
|-----|-----|-----|-----|-----| |-----|-----|-----|-----|-----|
|1|Nick|21|M|190| |1|Nick|21|M|190|