oracle中三种循环(For、While、Loop)案例

 1 declare
 2 i int:=0;
 3 j int:=0;
 4 begin
 5 for i in 1..9 loop
 6     for j in 1..i loop
 7         Dbms_Output.put(i||‘*‘||j||‘=‘||i*j);
 8         dbms_output.put(‘ ‘);
 9     end loop;
10     dbms_output.new_line;
11 end loop;
12 end;

 1 declare
 2 i int:=1;
 3 j int:=1;
 4 begin
 5   while i<=9 loop
 6    j:=1;
 7     while j<=i loop
 8       Dbms_Output.put(i||‘*‘||j||‘=‘||i*j);
 9       dbms_output.put(‘ ‘);
10       j:=j+1;
11       end loop;
12         dbms_output.new_line;
13       i:=i+1;
14     end loop;
15     end;

 1 declare 
 2 i int:=1;
 3 j int:=1;
 4 begin
 5 loop
 6 loop
 7    Dbms_Output.put(i||‘*‘||j||‘=‘||i*j);
 8    dbms_output.put(‘  ‘);
 9   j:=j+1;
10   exit when j>i;
11   end loop;
12   dbms_output.put_line(‘‘);
13   i:=i+1;
14   j:=1;
15   exit when i>9;
16   end loop;
17   end;