我使用postgres作为我的数据库并有2个表
accounts
id | name | status
accountOwner
account_id | user_id
我有user_id(accountOwner表)和状态(帐户表)根据我的accountid进行更新。是否可以更新1个查询中的两个表?我尝试了以下
UPDATE accounts,accountOwner SET accounts.status='active', accountOwner.user_id=3 WHERE accounts.id=accountOwner.account_id AND accountOwner.account_id = 1;
答案 0 :(得分:1)
不,您不能一次更新两个表。 The documentation说:
更新 - 更新表
的行
但是,您可以使用 FROM 子句,例如:
convenience init?(userInfo: [NSObject: AnyObject]) {
guard let statusString = userInfo[ConnectionMessage.StatusKey] as? String else {
return nil
}
guard let status = ConnectionStatus(string: statusString) else {
return nil
}
guard let connectionId = userInfo[ConnectionMessage.ConnectionIdKey]?.longLongValue else {
return nil
}
var ssid = ""
if let newSsid = userInfo[ConnectionMessage.SSIDKey] as? String {
ssid = newSsid
}
var password = ""
if let pw = userInfo[ConnectionMessage.PasswordKey] as? String {
password = pw
}
let buyerName = userInfo[ConnectionMessage.BuyerNameKey] as? String
self.init(status: status, connectionId: connectionId, ssid: ssid, password: password, buyerName: buyerName)
}