Sql Quickstart Guide The Simplified Beginners Guide To Sql Walter Shields by Walter Shields 9781945051548, 194505154X instant download after payment.

This book covers a wide array of topics that all deal with how to get information from a database. It introduces SQL, the language for communicating with a database. The focus is on using SQL as a query language, while the other aspects of the language are omitted.
You'll learn that the key to extracting data with SQL is the SELECT statement, which allows you to select the columns and tables from which to extract data. You'll learn how to filter with the WHERE clause by specifying any number of conditions in order to obtain the results that suit
your particular needs. We'll introduce logical and comparison operators in order to better manage situational data conditions. We'll also show how to manage the order of results with the ORDER BY clause.
You'll use JOIN statements to tackle the slightly tricky topic of selecting data from more than one table. You'll manage to link two or more tables to form a new results set, and the importance of the unknown (NULL) value.
You'll summarize and aggregate data rather than getting results based on individual records by using the GROUP BY statement, which enables results to be based on groups of common data. In
conjunction with SQL’s aggregate functions such as COUNT, SUM, AVG, MAX, and MIN you'll learn how to manipulate data and calculate specific values. You'll also use the HAVING clause, which filters out the result of groups using various conditions, much like a WHERE clause does for a
SELECT statement. You'll learn how to add new records to a database using the INSERT INTO statement, update already existing data with the UPDATE statement, and learn about the DELETE statement, which allows you to delete all or specific records from a table.
Finally, we learned how to use SQL to define the structure of the database itself. We used the CREATE DATABASE statement to create a new database from scratch. You'll also learn about CREATE/ALTER/DROP TABLE commands to successfully manipulate the structures of tables.