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;