創建.刪除，更新，獲取數據庫命令
阿新 • • 發佈：2017-10-17
create des 獲取 string eat 獲取數據 hat 建數據庫 echart
創建數據庫：
const std::string createImMessageIndex =
"CREATE UNIQUE INDEX IF NOT EXISTS sessionid_idx ON immessage(msgId DESC,sessionId);";
刪除條數：
const std::string DeleteMessageBySId
+ = "delete from immessage2 where msgId = ? and sessionid = ?";
更新：
const std::string UpdateMessageFileUrlBySId
= "update immessage set orifileurl = ? where msgId = ? and sessionid =?";
全清：
const std::string ClearAllChatMessage
= "delete from immessage";
獲取全部信息：
const std::string CalculateMessageChartSize
= "select * from immessage";
創建.刪除，更新，獲取數據庫命令