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Using %ROWTYPEThe %ROWTYPE attribute gives a record type which represents a row in a table (or view). The record can store the whole row of data selected from the table or fetched from a cursor or strongly typed cursor variable. In the illustration below, you declare two records. The first record stores a row selected from an emp table. The second record stores a row that is fetched from the cursor c1.DECLAREemp_rec emp%ROWTYPE;CURSOR c1 IS SELECT deptno, dname, loc FROM dept;dept_rec c1%ROWTYPE;The Columns in a row and corresponding fields in a record have the same names anddatatypes. Though, fields in a %ROWTYPE record do not inherit the NOT NULL column constraint.In the example below, you select column values into record emp_rec:BEGINSELECT * INTO emp_rec FROM emp WHERE...
FETCH Statement The FETCH statement retrieve rows of data one at a time from the result set of the multi-row query. The data is stored in fields or variables which correspond t
THEO R Y OF ETERNITY OF LIFE (PRAYER - 1880) - The theory of eternity of life, also called the steady-state theory , states that life has ever been in existence as at presen
Use Object Types and Collections The Collection types and object types increase your efficiency by allowing for the realistic data modeling. The Complex real-world entities an
i NEED TO CREATE 3 guiS IN pl/sql sERVER PAGE FORM
Declaring Exceptions The Exceptions can be declared only in the declarative part of the PL/SQL subprogram, block, or package. By introducing its name, you can declare an excep
IF Statement The IF statement executes a series of statement conditionally. Whether the series is executed or not depends on the value of the Boolean expression. Syntax:
Using RENAME in combination with JOIN - SQL Example gives pairs of ids of students having the same name, by joining two renamings of IS_CALLED. Example gives an equivalent ex
Why Use Cursor Variables ? Primarily, you use the cursor variables to pass the query result sets between the PL/SQL stored subprograms and different clients. Neither PL/SQL nor
EXCEPTION_INIT Pragma The pragma EXCEPTION_INIT relates an exception name with an Oracle error number. Which allow you to refer to any internal exception by the name and to wri
LAWS / RULES - Dollo's Law : Living organisms do exhibit evolutionary irreversibility or evolution is irreversible. Williston's Law
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