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Using AliasesThe Select-list items fetched from a cursor related with the %ROWTYPE should have simple names or, if they are expressions, should have aliases. In the example below, you use an alias known as the wages:-- available online in file ’examp4’DECLARECURSOR my_cursor ISSELECT sal + NVL(comm, 0) wages, ename FROM emp;my_rec my_cursor%ROWTYPE;BEGINOPEN my_cursor;LOOPFETCH my_cursor INTO my_rec;EXIT WHEN my_cursor%NOTFOUND;IF my_rec.wages > 2000 THENINSERT INTO temp VALUES (NULL, my_rec.wages, my_rec.ename);END IF;END LOOP;CLOSE my_cursor;END;
Row Counterparts of Table Operators SQL does not have counterparts tuple rename, tuple projection, tuple extension, tuple join and tuple compose. To obtain the same effects as
FORALL Statement The FORALL statements instruct the PL/SQL engine to bulk-bind the input collections before sending them to the SQL engine. Though the FORALL statement consists
Question: (a) In the context of database security explain how the following database features help to enforce security in the database system: (i) Authorisation (ii) Access
Use of Table Expressions - Expressing Constraint Conditions With the exception of key constraints, the examples in the theory book all explicitly reference at least one relvar
PITS Depressions in secondary cell wall is called pit. A pit present on the free cell wall surface without its partner is called Blind pit. It consists of 2 parts -
Project Description: I am looking to change FullCalendar to add/delete sql server data when events are removed or dropped from Calendar. Events should only be included by dra
DELETE Command - SQL Loosely speaking, DELETE removes some existing rows from its target table. Suppose the university decides that course C3 is to be withdrawn. Example shows
i NEED THE QURIES TO SOME OF THE PROBLEMS USING plsql
Biconditional - SQL The biconditional p ↔ q can be expressed in Tutorial D by p = q and the same is true of SQL. The question then arises as to whether, in SQL, p = q is equiv
Exceptions An exception is the runtime error or warning condition that can be predefined or user-defined. The Predefined exceptions are raised implicitly through runtime system
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