oracle常用hint添加

1.视图添加索引

/* Formatted on 2020/1/6 下午 04:46:37 (QP5 v5.163.1008.3004) */
SELECT /*+index(VIEW_NAME.TABLE01_NAME,INDEX01_NAME)
index(VIEW_NAME.TABLE01_NAME,INDEX01_NAME)
index(VIEW_NAME.TABLE02_NAME,INDEX01_NAME)
index(VIEW_NAME.TABLE03_NAME,INDEX01_NAME)
index(VIEW_NAME.TABLE04_NAME,INDEX01_NAME)
*/
      *
  FROM VIEW_OWNER.VIEW
 WHERE ADD_DATE > SYSDATE - 1;

2.多个索引添加hint

/* Formatted on 2020/1/6 下午 04:49:06 (QP5 v5.163.1008.3004) */
SELECT                                 /*+index(a INDEX_01) index(a INDEX02)*/
      COUNT (*)
  FROM TABLE_OWNER.TABLE_NAME a
 WHERE
CONDITION01 AND CONDITION02;

3.添加cursor_sharing hint

SELECT /*+ CURSOR_SHARING_EXACT */
*
FROM TABLE_OWNER.TABLE_NAME A
WHERE DECODE (TO_NUMBER (PROPERTY_01), 0, 0) = 0;

某些数据库因为开发为绑定变量所以把cursor_sharing设置为force，这样有时候一个值不想被oacle自动变成变量的话，可以用上述语句。