vsql='select ename into y from emp where empno=:1'
这是什么意思:1
这里?
这是您要使用的参数值的占位符。
例如:
SQL> set serveroutput on
SQL> declare
2 l_empno number := 7902;
3 v_sql varchar2(200);
4 l_ename varchar2(20);
5 begin
6 v_sql := 'select ename from emp where empno = :1';
7 execute immediate v_sql into l_ename using l_empno; --> this
8 dbms_output.put_line(l_ename);
9 end;
10 /
FORD
PL/SQL procedure successfully completed.
SQL>