Updating pl sql

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1) BEFORE UPDATE, Statement Level: This trigger will insert a record into the table 'product_check' before a sql update statement is executed, at the statement level.Output: Mesage Current_Date ------------------------------------------------------------ Before update, statement level 26-Nov-2008 Before update, row level 26-Nov-2008 After update, Row level 26-Nov-2008 Before update, row level 26-Nov-2008 After update, Row level 26-Nov-2008 After update, statement level 26-Nov-2008 The above result shows 'before update' and 'after update' row level events have occured twice, since two records were updated.In addition, my related problem was that only some of the columns were modified and many rows had no edits to these columns, so I wanted to leave those alone - basically restore a subset of columns from a backup of the entire table.If you want to just restore all rows, skip the where clause.So here's what I came up with: Thank you for your interest in this question.Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).1) Row level trigger - An event is triggered for each row upated, inserted or deleted.

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PL/SQL stands for Procedural Language extensions to the Structured Query Language (SQL).The following hierarchy is followed when a trigger is fired. 2) Next BEFORE row level trigger fires, once for each row affected.3) Then AFTER row level trigger fires once for each affected row.Getting to know more information about PL/SQL language.Before getting started, we highly recommend setting up Oracle database in your system to help you practice and learn PL/SQL effectively.

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