Querying tables with SELECT
1.1 A simple request
The SELECT statement is used to query one or more rows of one or more tables.
Whereas the other instructions, seen so far, have only a very small number of clauses, the SELECT statement is the
Data manipulation language (DML)
The Data Manipulation Language is the part of the SQL language used to perform operations on the content (LINES) of one or more tables.
There are only four possible operations: the insertion of rows, the withdrawal of rows, the interrogation
Fundamentals of Relational Database
1.1 Structure of a relational database
TABLE
Any information in a relational database is in the form of a table (like a spreadsheet). This one is a collection of columns (its structure) and lines (its content). Each of the tables
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