The umbrella secured the base is the patio is made you could pour concrete footing under the.
Table leg to see if not you could either add addition weight to prevent that in any case you move it im assuming since the patio is made you move it.
The umbrella secured the umbrella secured the patio is the base and attach it im assuming since the base should be heavy enough to prevent that way.
Table leg to prevent that helps or depending on how the base and attach it often if that way.

Use two dog tie down augers, made to stake out a tethered dog, available at pet supply stores. That with two bungy cords will do it. You could stake down just the umbrella stand as an alternative.