{DELETE|INSERT|SELECT|UPDATE} /*+ hint [text] [hint[text]]... */ 

 {DELETE|INSERT|SELECT|UPDATE} --+ hint [text] [hint[text]]... 

SELECT /*+ALL_ROWS*/ EMP_NO,EMP_NAM,DAT_IN FROM BSEMPMS WHERE EMP_NO='SCOTT'; 

SELECT /*+FIRST_ROWS*/ EMP_NO,EMP_NAM,DAT_IN FROM BSEMPMS WHERE EMP_NO='SCOTT'; 

SELECT /*+CHOOSE*/ EMP_NO,EMP_NAM,DAT_IN FROM BSEMPMS WHERE EMP_NO='SCOTT'; 

SELECT /*+ RULE */ EMP_NO,EMP_NAM,DAT_IN FROM BSEMPMS WHERE EMP_NO='SCOTT'; 

SELECT /*+FULL(A)*/ EMP_NO,EMP_NAM FROM BSEMPMS A WHERE EMP_NO='SCOTT'; 

 SELECT /*+ROWID(BSEMPMS)*/ * FROM BSEMPMS WHERE ROWID>='AAAAAAAAAAAAAA' 
 AND EMP_NO='SCOTT'; 

SELECT /*+CLUSTER */ BSEMPMS.EMP_NO,DPT_NO FROM BSEMPMS,BSDPTMS 
 
 WHERE DPT_NO='TEC304' AND BSEMPMS.DPT_NO=BSDPTMS.DPT_NO; 

 SELECT /*+INDEX(BSEMPMS SEX_INDEX) USE SEX_INDEX BECAUSE THERE ARE FEWMALE BSEMPMS */ FROM BSEMPMS WHERE SEX='M'; 

SELECT /*+INDEX_ASC(BSEMPMS PK_BSEMPMS) */ FROM BSEMPMS WHERE DPT_NO='SCOTT'; 

SELECT /*+INDEX_COMBINE(BSEMPMS SAL_BMI HIREDATE_BMI)*/ * FROM BSEMPMS 
WHERE SAL<5000000 AND HIREDATE 

SELECT /*+INDEX_JOIN(BSEMPMS SAL_HMI HIREDATE_BMI)*/ SAL,HIREDATE 
FROM BSEMPMS WHERE SAL<60000; 

SELECT /*+INDEX_DESC(BSEMPMS PK_BSEMPMS) */ FROM BSEMPMS WHERE DPT_NO='SCOTT'; 

SELECT /*+INDEX_FFS(BSEMPMS IN_EMPNAM)*/ * FROM BSEMPMS WHERE DPT_NO='TEC305'; 

 SELECT /*+INDEX_FFS(BSEMPMS IN_DPTNO,IN_EMPNO,IN_SEX)*/ * FROM BSEMPMS WHERE EMP_NO='SCOTT' AND DPT_NO='TDC306'; 

 SELECT /*+USE_CONCAT*/ * FROM BSEMPMS WHERE DPT_NO='TDC506' AND SEX='M'; 

SELECT /*+NO_EXPAND*/ * FROM BSEMPMS WHERE DPT_NO='TDC506' AND SEX='M'; 

SELECT /*+MERGE(V) */ A.EMP_NO,A.EMP_NAM,B.DPT_NO FROM BSEMPMS A (SELET DPT_NO 
 
 ,AVG(SAL) AS AVG_SAL FROM BSEMPMS B GROUP BY DPT_NO) V WHERE A.DPT_NO=V.DPT_NO 
 
 AND A.SAL>V.AVG_SAL; 

SELECT /*+NO_MERGE(V) */ A.EMP_NO,A.EMP_NAM,B.DPT_NO FROM BSEMPMS A (SELECT DPT_NO,AVG(SAL) AS AVG_SAL FROM BSEMPMS B GROUP BY DPT_NO) V WHERE A.DPT_NO=V.DPT_NO AND A.SAL>V.AVG_SAL; 

 SELECT /*+ORDERED*/ A.COL1,B.COL2,C.COL3 FROM TABLE1 A,TABLE2 B,TABLE3 C WHERE A.COL1=B.COL1 AND B.COL1=C.COL1; 

SELECT /*+ORDERED USE_NL(BSEMPMS)*/ BSDPTMS.DPT_NO,BSEMPMS.EMP_NO,BSEMPMS.EMP_NAM FROM BSEMPMS,BSDPTMS WHERE BSEMPMS.DPT_NO=BSDPTMS.DPT_NO; 

SELECT /*+USE_MERGE(BSEMPMS,BSDPTMS)*/ * FROM BSEMPMS,BSDPTMS WHERE BSEMPMS.DPT_NO=BSDPTMS.DPT_NO; 

SELECT /*+USE_HASH(BSEMPMS,BSDPTMS)*/ * FROM BSEMPMS,BSDPTMS WHERE BSEMPMS.DPT_NO=BSDPTMS.DPT_NO; 

SELECT /*+DRIVING_SITE(DEPT)*/ * FROM BSEMPMS,DEPT@BSDPTMS WHERE BSEMPMS.DPT_NO=DEPT.DPT_NO; 

SELECT /*+FULL(BSEMPMS) CAHE(BSEMPMS) */ EMP_NAM FROM BSEMPMS; 

SELECT /*+FULL(BSEMPMS) NOCAHE(BSEMPMS) */ EMP_NAM FROM BSEMPMS; 

insert /*+append*/ into test1 select * from test4 ; 

insert /*+noappend*/ into test1 select * from test4 ; 

/*+ NO_INDEX ( table [index [index]...] ) */ 
select /*+ no_index(emp ind_emp_sal ind_emp_deptno)*/ * from emp where deptno=200 and sal>300; 

select /*+ parallel(emp,4)*/ * from emp where deptno=200 and sal>300; 

alter session enable dml parallel； 

insert /*+parallel(xxxx,4) */ into xxxx select /*+parallel(a) */ * from xxx a;

select count(*) 
 From wid_serv_prod_mon_1100 a 
 where a.acct_month = 201010 
  and a.partition_id = 10 
  and serv_state not in ('2HB', '2HL', '2HJ', '2HP', '2HF') 
  and online_flag in (0) 
  and incr_product_id in (2000020) 
  and product_id in (2020966, 2020972, 2100297, 2021116) 
  and billing_mode_id = 1 
  and exp_date > to_date('201010', 'yyyymm') 
  and not exists (select /*+no_index (b IDX_W_CDR_MON_SERV_ID_1100)*/ 
     1 
     from wid_cdr_mon_1100 b 
     where b.acct_month = 201010 
      and b.ANA_EVENT_TYPE_4 in 
        ('10201010201', '10202010201', '10203010201', '10203010202', '10203030201', '10203030202', '10204010201', '10204010202', '10204030201') 
      and a.serv_id = b.serv_id)