错了,是 DATE_ADD() 或 ADDDATE()ADDDATE(date,INTERVAL expr unit), ADDDATE(expr,days) When invoked with the INTERVAL form of the second argument, ADDDATE() is a synonym for DATE_ADD(). The related function SUBDATE() is a synonym for DATE_SUB(). For information on the INTERVAL unit argument, see the discussion for DATE_ADD(). mysql> SELECT DATE_ADD('1998-01-02', INTERVAL 31 DAY); -> '1998-02-02' mysql> SELECT ADDDATE('1998-01-02', INTERVAL 31 DAY); -> '1998-02-02'When invoked with the days form of the second argument, MySQL treats it as an integer number of days to be added to expr. mysql> SELECT ADDDATE('1998-01-02', 31); -> '1998-02-02'
string sql = "select sum(ticketPrice) from wapMovie where telephone = '" + Session["userphone"] + "' and DATE_ADD(ticketDate, Interval 2 month) >= now()";
-> '1998-02-02'
mysql> SELECT ADDDATE('1998-01-02', INTERVAL 31 DAY);
-> '1998-02-02'When invoked with the days form of the second argument, MySQL treats it as an integer number of days to be added to expr. mysql> SELECT ADDDATE('1998-01-02', 31);
-> '1998-02-02'
MySQLCommand commn = new MySQLCommand(sql, conn);
if((Convert.ToInt32(commn.ExecuteScalar()>=80)))
跟楼上差不多,更细化了一些