By Donald Bales
Starting Oracle PL/SQL will get you begun in utilizing the integrated language that each Oracle developer and database administrator needs to be aware of. Oracle Database is brim-full of integrated program positive aspects which are loose for the utilizing, and PL/SQL is your price ticket 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 common sense, and you may automate database- and application-administration initiatives. writer Don Bales offers in starting Oracle PL/SQL a fast moving and example-filled instructional. research from Don's vast adventure to find the main regular facets of PL/SQL, with no losing time on imprecise and out of date positive aspects.
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Additional info for Beginning Oracle PL/SQL, 2nd Edition
Yes! 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.
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. With DELETE, however, you need to do things backwards. A Change in Order So you don’t think Hugh Darwen is a genius?
What you were doing back then was joining the two tables on the id column. Also recall that to demonstrate views, I created an authors_publications view? author_id. That too was an example of joining two tables on the id column. Joins in a Where Clause Listing 1-24 shows the SQL SELECT statement from that view created in Listing 1-11 with an added ORDER BY clause. In this example, I am joining the two tables using the WHERE clause (sometimes called traditional Oracle join syntax). info Chapter 1 ■ Relational SQL Listing 1-24.