Download E-books Oracle PL / SQL For Dummies PDF

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By Michael Rosenblum, Paul Dorsey

Find assistance for developing effective PL/SQL code

If you recognize a section approximately SQL, this publication will make PL/SQL programming painless!

The Oracle has spoken—you have to wake up to hurry on PL/SQL programming, correct? we think it will likely be a breeze with this e-book! you can find out approximately code buildings, most sensible practices, and code naming criteria, easy methods to use stipulations and loops, the place to put PL/SQL code in procedure initiatives, how one can manage facts, and more.

Discover how to

  • Write effective, easy-to-maintain code
  • Test and debug PL/SQL routines
  • Integrate SQL and PL/SQL
  • Apply PL/SQL most sensible practices
  • Use new good points brought in Oracle 9i and 10g

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Home_country_tx, ‘H’, v_customer_id); finish if; else raise_application_error (-20999, ‘Cannot create consumer with out name’); finish if; finish; / create or change set off v_customer_iu rather than replace on v_customer referencing new as new previous as previous start -- replace purchaser replace patron set lastname_tx = :new. lastname_tx, firstname_tx = :new. firstname_tx the place customer_id = :old. customer_id; -- insert/update/delete paintings addres if :old. work_id isn't null and :new. work_street_tx is null then delete from deal with the place address_id = :old. work_id; elsif :old. work_id is null and :new. work_street_tx isn't null then insert into tackle (address_id,street_tx, stateprovince_cd, postal_cd, country_tx, type_cd, customer_id) values (object_seq. nextval,:new. work_street_tx, :new. work_state_cd,:new. work_postal_cd, :new. work_country_tx, ‘W’, :old. customer_id); else replace tackle (continued) 179 180 half III: criteria and buildings directory 7-7 (continued) set street_tx=:new. work_street_tx, stateprovince_cd=:new. work_state_cd, postal_cd=:new. work_postal_cd, country_tx=:new. work_country_tx the place address_id = :old. work_id; finish if; -- insert/update/delete domestic handle if :old. home_id isn't null and :new. home_street_tx is null then delete from deal with the place address_id = :old. home_id; elsif :old. home_id is null and :new. home_street_tx isn't really null then insert into deal with (address_id, street_tx, stateprovince_cd, postal_cd, country_tx, type_cd, customer_id) values (object_seq. nextval,:new. home_street_tx, :new. home_state_cd,:new. home_postal_cd, :new. home_country_tx, ‘H’, :old. customer_id); else replace handle set street_tx=:new. home_street_tx, stateprovince_cd=:new. home_state_cd, postal_cd=:new. home_postal_cd, country_tx=:new. home_country_tx the place address_id = :old. home_id; finish if; finish; / With those triggers, you could INSERT, replace, and DELETE out of your view, and the information is properly maintained within the database. a few builders may possibly argue so you might have outfitted your database desk like the view we created within the first position. so much solid designers could layout the database in just the way in which we now have the following. this manner you could simply regulate the database to carry extra forms of addresses. you may additionally simply expand the constitution so your tackle desk might connect to forms of items (like employees). A database isn’t designed to aid a unmarried program, yet relatively it needs to be outfitted to aid a number of makes use of and simply adapt through the years. rather than set off perspectives glance similar to what your builders are looking to see with out compromising solid database layout ideas. you could create a view for every software reveal that appears precisely just like the monitor you will want. you could position validation common sense within the view that's particular to the appliance, and you may upload the other common sense that implies writing much less code. there's a monstrous stream within the to maneuver code from the database to the applying server, yet we’ve stumbled on that common sense that's applied within the database runs speedier, is much less susceptible to blunders, and is simpler to keep up.

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