📜  sql 多列索引性能 - SQL 代码示例

📅  最后修改于: 2022-03-11 15:05:35.791000             🧑  作者: Mango

代码示例1
CREATE INDEX idx_actor_name ON ACTOR (LAST_NAME, FIRST_NAME);

SELECT * FROM CUSTOMER c WHERE ADDRESS_ID = 10
AND exists(
    SELECT 1 FROM ACTOR a
    WHERE c.FIRST_NAME = a.FIRST_NAME
      AND c.LAST_NAME = a.LAST_NAME
);