Oracle 执行计划

explain plan for 后面接所执行的sql语句，select * from table(dbms_xplan.display);显示执行计划。sql 执行语句：ide explain plan for select * from t_pay_jnl  where to_char(sysdate-7200/(24*60*60),'YYYYMMDDhh24miss') < txn_tm  

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