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[Source] Oracle Chapter 5 Lesson Code

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Posted on 3/15/2015 10:36:35 AM | | |
  1. create table tab1
  2. (
  3.        tid number primary key,
  4.        tname varchar(10)
  5. );
  6. insert into tab1 values (1,'aaa');
  7. insert into tab1 values (2,'ddd');
  8. insert into tab1 values (3,'cccc');

  10. select * from tab1;

  12. --pl/sql
  13. begin
  14. dbms_output.put_line('my first pl/sql');
  15. end;
  16. --变量
  17. declare
  18.     --声明并初始化
  19.     a number := 1;
  20.     b number default 2;
  21.     c number;
  22.     d varchar(10);
  23. begin
  24.     dbms_output.put_line('a='||a);
  25.     dbms_output.put_line('b='||b);
  26.     --赋值1
  27.     c := 3;
  28.     dbms_output.put_line('c='||c);
  29.     --赋值2
  30.     select tname into d from tab1 where tid = 1;
  31.     dbms_output.put_line('d='||d);
  32. end;

  34. declare
  35.     --设置a的类型与tab1表中tid字段的类型一样
  36.     a tab1.tid%type;
  37.     b tab1.tname%type;
  38. begin
  39.     a := 123;
  40.     b := 'name';
  41.     dbms_output.put_line('a='||a);
  42.     dbms_output.put_line('b='||b);
  43. end;

  45. --循环4要素
  46. --1.loop
  47. declare
  48.     i int := 1;--1
  49. begin
  50.     loop
  51.         exit when i > 10;--2
  52.         dbms_output.put_line(i);--4
  53.         i := i + 1;--3
  54.     end loop;
  55. end;
  56. --2. while
  57. declare
  58.     i int := 1;--1
  59. begin
  60.     while i <= 10--2
  61.     loop
  62.         dbms_output.put_line(i);--4
  63.         i := i + 1;--3
  64.     end loop;
  65. end;
  66. --3. for
  67. begin
  68.     for i in 1..20--1,2,3
  69.     loop
  70.         dbms_output.put_line(i);--4
  71.     end loop;
  72. end;
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