By Lex de Haan, Daniel Fink, Tim Gorman, Inger Jørgensen, Karen Morton (auth.), Jonathan Gennick, Clay Andres, Steve Anglin, Mark Beckner, Ewan Buckingham, Gary Cornell, Jonathan Hassell, Michelle Lowman, Matthew Moodie, Duncan Parkes, Jeffrey Pepper, Frank
Beginning Oracle SQL is your advent to the interactive question instruments and particular dialect of SQL used with Oracle Database. The ebook is a revision of the vintage Mastering Oracle SQL and SQL*Plus via Lex de Haan, and has been up to date to hide advancements in Oracle's model of the SQL question language. Written in an easygoing and example-based sort, Beginning Oracle SQL is the ebook that may get you begun down the trail to effectively writing SQL statements and getting effects from Oracle database.
- Takes an example-based method, with transparent and authoritative causes
- Introduces either SQL and the question instruments used to execute SQL statements
- Shows tips on how to create tables, populate them with information, after which question that information to generate company effects
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Extra info for Beginning Oracle SQL
You can address all database users with the pseudo-user PUBLIC (see Figure 2-3). x The UPDATE privilege supports an optional refinement: this privilege can also be granted for specific columns, by specifying column names between parentheses. x In principle, there is no difference between tables and views when granting object privileges; however, the privileges ALTER, INDEX, and REFERENCES are meaningless in the context of views. x The GRANT OPTION not only grants certain object privileges, but also grants the right to the grantee to spread these privileges further.
User authorization is implemented by providing database users a login name and a password, together with some database-wide privileges. These are the most important commands in this area: x CREATE USER, to define new database users x ALTER USER, to change properties (privileges and passwords) of existing database users x DROP USER, to remove user definitions from the database Privileges and Roles If users are authorized to access the database, you can implement fine-grained data access by granting specific privileges.
All mainstream relational databases claim to support it. And yet, no two databases support it in quite the same way. Instead of completely different languages with dissimilar names, today we have “variations” that we refer to as Oracle SQL, Microsoft SQL, DB2 SQL, and so forth. The world really hasn’t changed much. DBMS Tools Most DBMS vendors supply many secondary programs around their DBMS software. I refer to all these programs with the generic term tools. These tools allow users to perform tasks such as the following: x Generate reports x Build standard data-entry and data-retrieval screens x Process database data in text documents or in spreadsheets x Administer the database Database Applications Database applications are application programs that use an underlying database to store their data.