oracle索引建立和删除

1.多列建立索引

SQL> create index dex_index2 on dex(sex,name);
Index created.
 
SQL>  select object_name,object_type from user_objects;
 
OBJECT_NAME                           OBJECT_TYPE
--------------------------------------------------------------------------------
DEX                                       TABLE
DEX_IDX1                                 INDEX
DEX_INDEX2                               INDEX

2.删除索引

DROP INDEX [schema.]indexname

 例如：

 sql> drop index pk_dept;