直角坐标系\(xOy\)中,曲线\(C_{1}\)的参数方程为\( \begin{cases} \overset{x= \sqrt {3}\cos \theta }{y=\sin \theta }\end{cases}\),以坐标原点为极点,以\(x\)轴的正半轴为极轴,建立极坐标系,曲线\(C_{2}\)的极坐标方程为\(ρ\sin (θ+ \dfrac {π}{4})=2 \sqrt {2}\).
\((1)\)写出\(C_{1}\)的普通方程和\(C_{2}\)的直角坐标方程;
\((2)\)设点\(P\)在\(C_{1}\)上,点\(Q\)在\(C_{2}\)上,求\(|PQ|\)的最小值.