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Database ValuesYou can use the SELECT statement to have the Oracle assign values to a variable. ForEach and every item in the select list, there must be a matching, type-compatible variable in the INTO list. An illustration is as shown below:DECLAREmy_empno emp.empno%TYPE;my_ename emp.ename%TYPE;wages NUMBER(7,2);BEGIN...SELECT ename, sal + commINTO last_name, wages FROM empWHERE empno = emp_id;Though, you cannot select column values into the Boolean variable.
Passing Cursor Parameters You use the OPEN statement to pass the parameters to a cursor. Unless you want to accept the default values, each proper parameter in the cursor decl
Product-specific Packages The Oracle and different Oracle tools are supplied with the product-specific packages which help you to build the PL/SQL-based applications. For illu
Extension and AND in SQL The theory book gives the following simple example of relational extension in Tutorial D: EXTEND IS_CALLED ADD ( FirstLetter ( Name ) AS Initial )
How Calls Are Resolved? The figure shows that how the PL/SQL compiler resolves the subprogram calls. When the compiler encounters the procedure or function call, it tries to di
different lock modes used in the locking system
Quantification in SQL To quantify something, as the theory book has it, is to state its quantity, to say how many of it there are. For example, in Tutorial D the expression CO
Using ROLLBACK The ROLLBACK statements end the present transaction and undo any change made during the transaction. The Rolling back is helpful for two reasons. Firstly, if yo
Hi,am developing a library system and relating all the table is somehow complex,could you kindly assist me
GOTO Statement The GOTO statement branches categorically to a block label or statement label. The label should be exclusive within its scope and should precede a PL/SQL bloc
Write a query to find academics that are authors and that have only ever coauthored papers with authors from institutes in the same state as their own. List their academic number,
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