在Oracle中创建不同类型索引的SQL语法和示例

create index index_name
on table_name (column_name);

create index idx_employees_dept_id 
on employees (dept_id);

create index index_name
on table_name (column1, column2, ...);

create index idx_orders_customer_date 
on orders (customer_id, order_date);

create unique index index_name
on table_name (column_name);

create unique index idx_users_email 
on users (email);

create bitmap index index_name
on table_name (column_name);

create bitmap index idx_employees_gender 
on employees (gender);

create index index_name
on table_name (function(column_name));

create index idx_employees_lastname_upper 
on employees (upper(last_name));

create index index_name
on table_name (column_name)
reverse;

create index idx_employees_id_reverse 
on employees (employee_id) reverse;

create index index_name
on table_name (column_name)
tablespace tablespace_name;

create index idx_employees_dept_id 
on employees (dept_id)
tablespace users_tbs;

create index index_name
on table_name (column_name)
parallel (degree 4);

create index idx_employees_dept_id 
on employees (dept_id)
parallel (degree 4);

create index index_name
on table_name (column_name)
nologging;