MySQL中有一種特殊的數據類型'time'。 如果我想讓我的'時間'值在某些state_id從1變爲2時開始計數，觸發器將如何顯示？例如： CREATE TRIGGER log_time AFTER UPDATE ON usr
FOR EACH ROW
BEGIN
IF usr.st_id = 2 THEN
#.... - thats what i dont know
END IF;
我有以下代碼： class Quadratic:
def __init__(self, a, b, c):
self.a = a
self.b = b
self.c = c
def function(self, x):
self.F(x) = a*(x**2) + b*x + c
return F(x)
我在XAML一個DataGrid和我通過設置的ItemsSource這樣 var myList = new List<Product>();
//Product is a standard class created for the purpose of populating the datagrid
myList.Add(new Product(){Name = "bla", Serial