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FOR EXAMPLE in Java Drawer code 128 barcode in Java FOR EXAMPLE

FOR EXAMPLE use spring framework code-128b creation toget code-128 for java GS1 General Specifications DECLARE CURSOR stu Code-128 for Java dent_cur IS SELECT student_id, first_name, last_name FROM student; BEGIN FOR rec IN student_cur LOOP DBMS_OUTPUT.PUT_LINE ("student_id: ". rec.student_id); D BMS_OUTPUT.PUT_LINE ("first_name: ".

rec.first_name); D barcode code 128 for Java BMS_OUTPUT.PUT_LINE ("last_name: ".

rec.last_name); EN D LOOP; END;. Recall that the cu j2ee Code 128 Code Set A rsor FOR loop opens and closes the cursor and fetches cursor records implicitly. The same task of fetching records from the STUDENT table can be accomplished by employing the BULK COLLECT clause. The difference here is that the BULK COLLECT clause fetches all rows from the STUDENT table at once.

Because BULK COLLECT fetches multiple rows, these rows are stored in collection variables. Consider a modified version of the previous example, in which the cursor processing is replaced by the BULK COLLECT clause:. The BULK COLLECT Clause FOR EXAMPLE DECLARE -- Define collection type and variables to be used by the -- BULK COLLECT clause TYPE student_id_type IS TABLE OF student.student_id%TYPE; TYPE first_name_type IS TABLE OF student.first_name%TYPE; TYPE last_name_type IS TABLE OF student.

last_name%TYPE; student_id_tab student_id_type; first_name_tab first_name_type; last_name_tab last_name_type; BEGIN -- Fetch all student data at once via BULK COLLECT clause SELECT student_id, first_name, last_name BULK COLLECT INTO student_id_tab, first_name_tab, last_name_tab FROM student; FOR i IN student_id_tab.FIRST..

student_id_tab.LAST LOOP DBMS_OUTPUT.PUT_LINE ("student_id: ".

student_id_tab(i)) Code 128 Code Set A for Java ; DBMS_OUTPUT.PUT_LINE ("first_name: ". first_name_tab(i)) ; DBMS_OUTPUT.PUT_LINE ("last_name: ". last_name_tab(i)); javabean code 128a END LOOP; END;. This script declar es three nested table types and variables. These variables are used to store data returned by the SELECT statement with the BULK COLLECT clause..

DID YOU KNOW When awt Code 128 nested tables are populated using the SELECT BULK COLLECT INTO statement, they are initialized and extended automatically. Recall that typically a nested table must be initialized prior to its use by calling a constructor function that has the same name as its nested table type. After it has been initialized, it must be extended using the EXTEND method before the next value can be assigned to it.

. To display this da ta, the collections are looped through using a numeric FOR loop. Note how lower and upper limits for the loop counter are specified using the FIRST and LAST methods. The BULK COLLECT clause is similar to a cursor loop in that it does not raise a NO_DATA_ FOUND exception when the SELECT statement does not return any records.

As a result, it is considered a good practice to check if a resulting collection contains any data. Because the BULK COLLECT clause does not restrict the size of a collection and extends it automatically, it is also a good idea to limit the result set when a SELECT statement returns large. The BULK COLLECT Clause amounts of data. T his can be achieved by using BULK COLLECT with a cursor SELECT and by adding the LIMIT option..

FOR EXAMPLE DECLARE CURSOR stu dent_cur IS SELECT student_id, first_name, last_name FROM student; -- Define collection type and variables to be used by the -- BULK COLLECT clause TYPE student_id_type IS TABLE OF student.student_id%TYPE; TYPE first_name_type IS TABLE OF student.first_name%TYPE; TYPE last_name_type IS TABLE OF student.

last_name%TYPE; student_id_tab student_id_type; first_name_tab first_name_type; last_name_tab last_name_type; -- Define variable to be used by the LIMIT clause v_limit PLS_INTEGER := 50; BEGIN OPEN student_cur; LOOP -- Fetch 50 rows at once FETCH student_cur BULK COLLECT INTO student_id_tab, first_name_tab, last_name_tab LIMIT v_limit; EXIT WHEN student_id_tab.COUNT = 0; FOR i IN student_id_tab.FIRST.

.student_id_tab.LAST LOOP DBMS_OUTPUT.

PUT_LINE ("student_id: ". student_id_tab(i)) Code-128 for Java ; DBMS_OUTPUT.PUT_LINE ("first_name: ". first_name_tab(i)) ; DBMS_OUTPUT.PUT_LINE ("last_name: ". last_name_tab(i)); code 128a for Java END LOOP; END LOOP; CLOSE student_cur; END;. This script employ s a BULK COLLECT clause with the LIMIT option to fetch 50 rows from the STUDENT table at once. In other words, each collection contains, at most, 50 records. To accomplish this, the BULK COLLECT clause is used in conjunction with the cursor loop.

Note. The BULK COLLECT Clause that in this case, the loop s exit condition is based on the number of records in the collection rather than the student_cur%NOTFOUND attribute. Note how the numeric FOR loop that displays information on the screen has been moved inside the cursor loop. This is done because every new batch of 50 records fetched by the BULK COLLECT replaces the previous batch of 50 records fetched in the previous iteration.

So far you have seen examples of the BULK COLLECT clause fetching data into collections where the underlying elements are simple data types such as NUMBER or VARCHAR2. However, the BULK COLLECT clause can be used to fetch data into collections of records or objects. Collections of objects are discussed in 23, Object Types in Oracle.

Consider a modified version of the previous example, in which student data is fetched into a collection of user-defined records:.
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