forrecin(selectcol_1, col_2fromtable_a) loop /*Statements, use rec.col_1 and rec.col_2 */ endloop; forrecincursor_name loop /*Statements, use rec.col_1 and rec.col_2 */ endloop; forrecincursor_name(cursor_param_
insert into a values(i,i*2); end loop; See also Iterating over collection variables. Cursor for loop for rec in (select col_1, col_2 from table_a) loop /*Statements, use rec.col_1 and rec.col_2 */ end loop; for rec in cursor_name loop /*Statements, use rec.col_1 and rec...
PL/SQL Basic LOOP In this loop structure, sequence of statements is enclosed between the LOOP and the END LOOP statements. At each iteration, the sequence of statements is executed and then control resumes at the top of the loop. 2 PL/SQL WHILE LOOP Repeats a statement or group of sta...
SQL> @rdbms\admin\utlxplan.sql; SQL> create public synonym plan_table for plan_table;--建立同义词 SQL> grant all on plan_table to public;--授权所有用户 要在数据库中建立一个角色plustrace,用sys用户运行脚本plustrce.sql来创建这个角色,这个脚本在目录(sqlplus\admin)中; SQL> @sqlplus\admin\plust...
Loops with PL/SQL Types of loops Basic loop loop /* statements */ end loop; While loop while a > b loop /* statements */ end loop See also Iterating over collection variables. For loop for i in 1..1000 loop insert into a values(i,i*2); ...
PL/SQL allows using one loop inside another loop. Following section shows a few examples to illustrate the concept.The syntax for a nested basic LOOP statement in PL/SQL is as follows −LOOP Sequence of statements1 LOOP Sequence of statements2 END LOOP; END LOOP; The syntax for a nested...
标记PL/SQL 循环可以标记 PL/SQL 循环。 标签应该用双尖括号 (<< 和 >>) 括起来,并出现在 LOOP 语句的开头。 标签名称也可以出现在 LOOP 语句的末尾。 您可以使用 EXIT 语句中的标签退出循环。下面的程序说明了这个概念 −DECLARE i number(1); j number(1); BEGIN << outer_loop >> FOR i IN 1...
PL/SQL 允许在另一个循环中使用一个循环。以下部分显示了一些示例来说明这个概念。 PL/SQL 中嵌套基本 LOOP 语句的语法如下: LOOP Sequence of statements1 LOOP Sequence of statements2 END LOOP; END LOOP; 复制 PL/SQL 中嵌套 FOR LOOP 语句的语法如下: FOR counter1 IN initial_value1 .. final_...
[Chapter 7] 7.7 Tips for PL/SQL LoopsSteven Feuerstein &Bill Pribyl
If the condition is false, the code in the loop will never be executed. WHILE loop makes your code a little easier to read than with a normal loop. WHILE condition LOOP statements END LOOP; SQL> SQL> set serveroutput on SQL> set echo on SQL> SQL> DECLARE 2 v_Calc NUMBER := 0; ...