Cristian Darie's Programmer's Guide to SQL PDF

By Cristian Darie

ISBN-10: 1590592182

ISBN-13: 9781590592182

The Programmer's advisor to SQL presents an in-depth but concise instructional at the use of based question Language (SQL), the normal that defines how you can create and manage databases and the information that they shop. as soon as you will have mastered the basics, the ebook serves as a convenient laptop reference on SQL utilization, overlaying the entire significant SQL statements that you are more likely to desire whilst programming databases, with instance code for 5 significant database structures: SQL Server, Oracle, DB2, MySQL, and entry. In each one case, it demonstrates how the SQL average is carried out, and from time to time prolonged, through each one database method seller. It discusses: - Querying, editing and summarizing information utilizing SQL - SQL capabilities - advanced nested queries and joins - Programming database shops tactics, triggers and perspectives - growing tables, indexes and different database gadgets - find out how to write transaction-safe SQL - how you can enforce easy database defense The e-book covers the very newest model of the SQL common, SQL-99, and comprises whole case reviews, displaying the right way to create and question the underlying database for a completely featured website, and the way to enforce role-based safeguard on your functions. As such, it truly is excellent for any programmer, analyst, or database administrator looking for an SQL reference that still demonstrates how you can use SQL to resolve actual enterprise difficulties.

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For example, it allows NewColumnName = ExistingColumn. As before, you can see how this works in practice by executing the following SQL query against the InstantUniversity database: SELECT Name AS StudentName, StudentID AS ID FROM Student; This query should produce the following results (only the first four records are shown): StudentName ID ---------------John Jones Gary Burton Emily Scarlett Bruce Lee ... ---1 2 3 4 ... In the database, these two columns are called Name and StudentID. In the result set, you have given them the aliases StudentName and ID, respectively.

You can achieve this by placing various restrictions on the SQL query in a WHERE clause. 2007 10:32:20] Understanding Simple Retrieval Understanding Simple Retrieval To extract data from a database using SQL, you use a SELECT statement. All SELECT statements start in the same way, using the SELECT keyword. The rest of the statement varies but generally includes the names of the columns in which you're interested and the name of the table from which you want to extract data. The following sections focus on how to retrieve data for every row of every column of a table and how to limit your queries to a specific column (or columns).

2007 10:32:25] Summary Summary This chapter introduced the basic usage of SQL and examined how to use simple SELECT queries to extract data from tables in a relational database. Specifically, you learned about the following: ● Understanding basic SELECT syntax ● Providing aliases for columns and tables ● Calculating new rows based on existing content ● Sorting data ● Filtering data with the WHERE clause ● Combining multiple WHERE clauses ● Performing advanced WHERE clause filtering, including ranges ● Defining set membership ● Using pattern matching ● Filtering NULL values In the next chapter you'll look at how you can use SQL to modify data in a database table.

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Programmer's Guide to SQL by Cristian Darie


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