By Ryan Stephens, Ron Plew, Arie D. Jones
ISBN-10: 0672335417
ISBN-13: 9780672335419
In exactly 24 periods of 1 hour or much less, you’ll the way to use SQL to construct powerful databases, successfully retrieve your info, and deal with every thing from functionality to defense! utilizing this book’s hassle-free, step by step method, you’ll research hands-on via sensible examples. each one lesson builds on what you’ve already discovered, providing you with a powerful real-world starting place for fulfillment. The authors consultant you from absolutely the fundamentals to complicated techniques—including perspectives, transactions, internet information publishing, or even robust SQL extensions for Oracle and Microsoft SQL Server! step by step directions rigorously stroll you thru the most typical SQL projects. Quizzes and workouts on the finish of every bankruptcy assist you attempt your wisdom. incidentally notes current attention-grabbing info concerning the dialogue. do you know? assistance supply recommendation or exhibit you more straightforward how one can practice projects. be careful! cautions provide you with a warning to attainable difficulties and provides you suggestion on the best way to keep away from them. the right way to… comprehend what SQL is, the way it works, and what it does outline effective database constructions and items “Normalize” uncooked databases into logically equipped tables Edit relational facts and tables with DML deal with database transactions Write potent, well-performing queries Categorize, summarize, variety, workforce, and restructure information paintings with dates and instances subscribe to tables in queries, use subqueries, and mix a number of queries grasp robust question optimization suggestions Administer databases and deal with clients enforce potent database safeguard Use perspectives, synonyms, and the procedure catalog expand SQL to the company and net grasp very important Oracle and Microsoft SQL Server extensions to ANSI SQL
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Additional info for Sams Teach Yourself SQL in 24 Hours (5th Edition) (Sams Teach Yourself -- Hours)
Example text
The schema name for that table is USER1, which is also the owner of that table. You have just created the first table of a schema. The good thing about schemas is that when you access a table that you own (in your own schema), you do not have to refer to the schema name. EMPLOYEE_TBL The first option is preferred because it requires fewer keystrokes. EMPLOYEE_TBL In Hour 20, “Creating and Using Views and Synonyms,” you learn about the distribution of permissions so that other users can access your tables.
999 seconds is used for leap seconds. Be aware that each implementation of SQL might have its own customized data type for dates and times. The previous data types and elements are standards to which each SQL vendor should adhere, but be advised that most implementations have their own data type for date values, varying in both appearance and the way date information is actually stored internally. A length is not normally specified for a date data type. Later in this hour, you learn more about dates, how date information is stored in some implementations, and how to manipulate dates and times using conversion functions.
We are going to set up a database to use for the subsequent hours in this book. Remember that you have to have installed one of the three database implementations—MySQL, Oracle, or Microsoft SQL Server— before continuing: MySQL From Windows Explorer, go to the folder where you installed MySQL on your computer. exe. exe from the bin folder, and then enter a username and password. exe from the bin folder. At the mysql> command prompt, enter the following command to create a database to use for this book’s exercises: create database learnsql; Be sure to press the Enter key on your keyboard after entering the command.
Sams Teach Yourself SQL in 24 Hours (5th Edition) (Sams Teach Yourself -- Hours) by Ryan Stephens, Ron Plew, Arie D. Jones
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