Not Relations,Can be linked to the 2 table query?

JavaScript
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Application message to be sent

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Is not designed to, a message, send a lot of users, but also to know whether the message view

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Send a personal message to 1000,Everyone also knows whether the message view,How design structure?

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Backendless use mysql, or mongodb?

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Hi,

Could you please explain in more details your question.

Regards,

Denys

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No English, no good description

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var query1 = new Backendless.DataQuery();
query1.options = {pageSize: data[4].value, offset: data[3].value,condition: "Notice[Users].objectId='838B0879-87F5-E317-FFA6-24CA175B3D00'"};// +
//"and Notice[status].isSee=null or isSee=true"};
Store = Backendless.Persistence.of(Classes.Notice).find(query1);
console.log(Store);
Condition is not easy to use,There is only one piece of data, return 2