Question

我正在尝试使用END AS创建的结果列以及现有的id列创建一个新表。我的查询结果在第一个表中。我想创建一个看起来像第二个的新表。我尝试过多种不同的SELECT INTO方式，但我甚至无法从结果中创建一个新表。

function startRecord(socket) {
console.log("in func");
var userSession = userRegistry.getById(socket.id);

if (!userSession) {
    return;
}

var room = rooms[userSession.roomName];

if(!room){
    return;
}

var usersInRoom = room.participants;

var data = {
    id: 'startRecording'
};

for (var i in usersInRoom) {
    console.log("in loop");
    var user = usersInRoom[i];
    // release viewer from this
    user.outgoingMedia.recorderEndpoint.record();
    // notify all user in the room
    user.sendMessage(data);
    console.log(user.id);
}}

Answer 1

SELECT table1."id",
CASE WHEN table2.val IS NOT null AND table2.val != 'N' THEN table2.val
WHEN table2.val = 'N' THEN null 
WHEN table1.val = 'N' THEN null
ELSE table1.val
END AS results INTO New_Table
FROM table1
LEFT JOIN table2 ON table2."id" = table1."id"

SELECT INTO以及CASES和JOIN创建一个新表

1 个答案: