By Donald Bales
Beginning Oracle PL/SQL will get you all started in utilizing the integrated language that each Oracle developer and database administrator needs to understand. Oracle Database is brim-full of integrated software beneficial properties which are unfastened for the utilizing, and PL/SQL is your price tag to studying approximately and utilizing these positive aspects out of your personal code. With it, you could centralize company common sense within the database, you could offload program good judgment, and you may automate database- and application-administration projects.
Author Don Bales offers in Beginning Oracle PL/SQL a fast paced and example-filled educational. study from Don’s huge event to find the main universal points of PL/SQL, with out losing time on vague and out of date beneficial properties.
The writer takes his 20+ years of expertise and a wealth of information he is accrued on PL/SQL utilization over these years and applies the 80/20 rule: hide what is so much wanted and utilized by PL/SQL pros and keep away from what is no longer valuable! the result's a ebook that covers the entire key positive factors of PL/SQL with out squandering precious time discussing esoteric and out of date components of the language. examine what particularly issues, for you to get to paintings feeling convinced with what you recognize approximately PL/SQL.
- Covers the most important themes that topic, together with variables and datatypes, executing statements, operating with cursors, bulk operations, real-world items, debugging, checking out, and more.
- Teaches you to write down production-level, object-oriented PL/SQL. you are going to discover relational PL/SQL, yet in contrast to such a lot different books at the topic, this one emphasizes using PL/SQLs object-oriented gains as well.
- Guides you in operating via genuine examples of utilizing of PL/SQL. you will research PL/SQL by means of employing it to real-world company difficulties, no longer via heavy theory.
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Extra info for Beginning Oracle PL/SQL
You can update multiple columns at the same time simply by grouping them with parentheses. The moral of the story is, don’t use PL/SQL to do something you can already do with SQL. I’ll be harping on this moral throughout the book, so if you didn’t get my point, relax, you’ll hear it again and again in the coming chapters. Delete In practice, data is rarely deleted from a relational database when compared to how much is input, updated, and queried. Regardless, you should know how to delete data.
Execute your scripts in SQL*Plus by typing an at sign (@) followed by the file name at the SQL> prompt. The author_publications table should now have eight rows. And, if you run the Darwen script again, you won’t get any duplicate-value errors, because the SQL detects whether Darwen’s entries already exist in the database. Listings 1-16 and 1-17 show my solutions. Listing 1-16. gather_table_stats(USER, 'AUTHOR_PUBLICATIONS'); Listing 1-17. gather_table_stats(USER, 'AUTHOR_PUBLICATIONS'); It didn’t work?
These take the place of the keyword DECLARE used earlier in the anonymous PL/SQL block. • Line 2 declares one parameter, aiv_number, a varchar2 value passed INto the FUNCTION. • Line 3 contains the RETURN clause. In this case, I’m returning a number. • Lines 4 through 8 contain a multiline comment that lists the function’s source code filename, the name of the author, the date the function was written, and a description of the function’s purpose. So the only thing in the declaration section of this PL/SQL block is the multiline comment.