相关疑难解决方法(0)

我想从WebSql更改为Indexeddb.但是,如何进行SQL查询

SELECT * FROM customers WHERE ssn = '444-44-4444' and emal = 'bill@bill@company.com'
SELECT * FROM customers WHERE ssn = '444-44-4444' and emal = 'bill@bill@company.com' and age = 30
SELECT * FROM customers WHERE ssn = '444-44-4444' and emal = 'bill@bill@company.com' and name = 'Bill'
etc

使用IndexedDB？例如,我在阅读indexedDb 的文档时注意到,所有示例当时只查询一个索引.所以你可以做到

var index = objectStore.index("ssn");
index.get("444-44-4444").onsuccess = function(event) {
     alert("Name is " + event.target.result.name);
};

但我需要同时查询多个索引!

我还发现了一些关于复合索引的有趣帖子,但它们只有在查询复合索引中的所有字段时才有效.