Explain sql statement : explain plan « SQL Plus « Oracle PL / SQL

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Oracle PL / SQL » SQL Plus » explain plan 
Explain sql statement
   

SQL>
SQL> create table emp (
  2      EmpNo          NUMBER(10primary key,
  3      Name           VARCHAR2(40),
  4      DeptNo         NUMBER(2),
  5      Salary         NUMBER(7,2),
  6      Birth_Date     DATE,
  7      Soc_Sec_Num    VARCHAR2(9),
  8      State_Code     CHAR(2)
  9  );
SQL>
SQL> explain plan
  2  set Statement_Id = 'TEST'
  3  for
  4  select from emp;
SQL>
SQL> select LPAD(' ',2*Level)||Operation||' '||Options||' '||Object_Name Q_Plan
  2  from PLAN_TABLE
  3  where Statement_Id = 'TEST'
  4  connect by prior ID = Parent_ID and Statement_ID = 'TEST'
  5  start with ID=0;
                                                              

Q_PLAN
------------------------------------------------------------------------------------------------------------------------
  SELECT STATEMENT
    TABLE ACCESS FULL EMP
    TABLE ACCESS FULL EMP
  SELECT STATEMENT
    TABLE ACCESS FULL EMP
    TABLE ACCESS FULL EMP
                    
SQL>
SQL> set autotrace off  explain
SQL>
SQL>
SQL> drop table emp;

   
    
    
  
Related examples in the same category
1. explain plan for query
2. explain plan for select statement
3. Execution plan for the specified statement_id
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