//var data = "weihexin" //var data = ["weihexin", 1] var data = {name:"weihexin", id:1} var json = JSON.stringify(data);//返回 json string console.log(json);//{"name":"weihexin","id":1} var _data =
update: update语句更新需要根据索引或者数据列遍历所有行 语句举例: update table1 a set column1=(select column from table2 b where a.col=b.col) merge:merge只需要遍历一次表,,可以更新可以插入 语句举例: merge into table1 a using (select col1,co2 from table2 where col3 条件) table2 on a.colm=table2.co