Pl/SQL 编程

  1 SQL> set serveroutput on;
  2 SQL>
  3 SQL> declare
  4   2  a int:=10;
  5   3  b int:=200;
  6   4  c number;
  7   5  begin
  8   6    c:=(a+b)/(a-b);
  9   7    dbms_output.put_line(c);
 10   8  exception
 11   9     when zero_divide then
 12  10       dbms_output.put_line(‘除数不许为零‘);
 13  11   end;
 14  12  /
 15 
 16 -1.10526315789473684210526315789473684211
 17 
 18 PL/SQL procedure successfully completed
 19 
 20 SQL>

二     ——  2：  代码注释和标识符

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Pl/SQL 编程

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