This chapter discussed about databases and how they relate to one another.
schemas - representation of the structures within a database
normalization - altering the design of a database to reduce duplicate data and improve placement of new data
Foreign Key - a column in a table used to relate a table to another table
for() - a loop code
? : - ternary operator used to perform simple true/false expression like a if-else statement
Inner Join - let you join table from two tables with matching rows
AS name - use as aliases to make column/table names more simple to code
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