May 2018
Intermediate to advanced
392 pages
10h 22m
English
Content preview from Practical SQL
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1CREATING YOUR FIRST DATABASE AND TABLE
SQL is more than just a means for extracting knowledge from data. It’s also a language for defining the structures that hold data so we can organize relationships in the data. Chief among those structures is the table.
A table is a grid of rows and columns that store data. Each row holds a collection of columns, and each column contains data of a specified type: most commonly, numbers, characters, and dates. We use SQL to define the structure of a table and how each table might relate to other tables in the database. We also use SQL to extract, or query, data from tables.
Understanding tables is fundamental ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.