PL/SQL中SQL操作

• sql%rowcount属性：实际在sql操作过程中开起了隐式游标，表示最近执行的sql语句影响的行数

declare
  vCount number;
  vDeptno dept2.deptno%type := 10;
begin

  --select count(*) into vCount from dept2;
  --update dept2 set dname = dname || '~.~' where deptno = vDeptno;
  --delete from dept2 where deptno = 40;

  insert into dept2 select * from dept;
  dbms_output.put_line('count:' || vCount);
  dbms_output.put_line(sql%rowcount || '行受影响');

end;

PL/SQL执行静态sql语句

begin
  execute immediate 'create table temp as select * from dept';
end;

动态sql（变量占位符）

declare
     sqlstr varchar2(100);
begin

     sqlstr := 'insert into scott.dept values(12, :1, :abc)';

     --变量是按照占位符顺序插入的
     execute immediate sqlstr using '教务部', '武汉';
end;

select * from scott.dept;

动态sql(把查询结果赋值给变量)

declare
       dept_row_data scott.dept%rowtype;
       sqlstr varchar2(100);
begin
     sqlstr := 'select * from scott.dept where deptno = 11';
     execute immediate sqlstr into dept_row_data;
     dbms_output.put_line(dept_row_data.deptno);

end;

判断循环

if 语句

declare
  vSal emp.sal%type;
begin
  select sal into vSal from emp where empno = 7566;

  if (vSal < 1200) then
    dbms_output.put_line('小于1200');
  elsif (vSal < 2000) then
    dbms_output.put_line('小于2000');
  else
    dbms_output.put_line('大于2000');
  end if;
end;

loop循环

declare
  i binary_integer := 10;
begin

  loop
    dbms_output.put_line(i);
    i := i - 1;
    exit when(i < 1);
  end loop;

end;

while循环

declare
  i binary_integer := 1;
begin
  while i < 11 loop
     dbms_output.put_line(i);
     i := i + 1;
  end loop;
end;

for 循环

begin
  for i in 1..10 loop
    dbms_output.put_line(i);
  end loop;

  for i in reverse 1..10 loop
    dbms_output.put_line(i);
  end loop;
end;

参考

http://www.cnblogs.com/hoojo/archive/2011/05/03/2035357.html