在视图上运行查询或在带有 where 子句的关联视图查询上运行查询之间是否存在(大)性能差异?
例如
CREATE VIEW v_comedies AS
SELECT *
FROM films
WHERE kind = 'Comedy';
这些查询之间是否存在性能差异?
1: SELECT * FROM v_comedies WHERE filmName LIKE 'Bat%'
2: SELECT * FROM films WHERE kind = 'Comedy' AND filmName LIKE 'Bat%'