如何导出（转储）WebSQL数据 [英] How to export (dump) WebSQL data

问题描述

我正在使用使用WebSQL存储历史数据的Chrome扩展程序。
作为WebSQL，数据库存储在客户端。

I'm working on a Chrome Extension that uses WebSQL to store historical data. Being WebSQL, the DB is stored on the client.

我想添加一个选项来导出/导入这样的数据，以便用户可以共享/与其他用户或其他PC使用此数据。

I'd like to add an option to export/import such data so that the user can share/use this data with other users, or with other PCs.

这是我们在仅客户端数据库的第一步，所以我不知道该怎么做。
我正在考虑将数据库转换为一个巨大的 json 字符串，用户可以复制/粘贴，但看起来不是很友好。

These are my first steps on a client-only database, so I wonder how to do this. I was thinking to convert the DB to a huge json string that the user can copy/paste but doesn't look very user-friendly.

有没有更好的解决方案？

Is there any better solution?

推荐答案

我有一个单表转储解决方案在几天前我写的 HTML5数据库客户端上。

I got a single table dump solution working on a HTML5 database client I wrote a few days ago.

查看 http://html5db.desalasworks.com/script。 js 并向下滚动到SqlClient.exportTable，这有一个需要扩展以覆盖整个数据库的示例。

Check out http://html5db.desalasworks.com/script.js and scroll down to SqlClient.exportTable, this has an example that needs to be expanded to cover the whole database.

步骤是：

步骤1：创建模式：

SELECT sql FROM sqlite_master

步骤2：获取表格列表：

Step 2: Get a list of tables:

SELECT tbl_name from sqlite_master WHERE type = 'table'

步骤3：循环遍历每个人，并创建一个INSERT脚本，结果

Step 3: Loop through each of them and create an INSERT script with the results

transaction.executeSql("SELECT * FROM " + _tbl_name + ";", [], 
    function(transaction, results) {
        if (results.rows) {
            for (var i = 0; i < results.rows.length; i++) {
                var row = results.rows.item(i);
                var _fields = [];
                var _values = [];
                for (col in row) {
                    _fields.push(col);
                    _values.push('"' + row[col] + '"');
                }
                _exportSql += ";\nINSERT INTO " + _tbl_name + "(" + _fields.join(",") + ") VALUES (" + _values.join(",") + ")";
            }
        }
    }
);

希望这是有用的。

strong> UPDATE JAN 2016 - 全部数据库导出

UPDATE JAN 2016 - WHOLE DB EXPORT

我有一个JS websqldump库，您也可以从github下载。

I've got a JS websqldump library that you can download from github as well.

这个将导出整个数据库。查看代码：

This one will export the whole database. Check out the code on:

https：// github .com / sdesalas / websqldump

使用方法如下

websqldump.export({
  database: 'NorthwindLite',
  success: function(sql) {alert(sql);}
});

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