Some will, most won't. I generally try a water dish with a new dragon, if they use then it stays but if they never use it, out it comes. I
Most people
bath their dragon so they have access to
drinking water. Fill a tub or container with enough warm water that its roughly armpit deep on dragon, add dragon. Some hate this but keep trying, most eventually get used to it and calm down enough to relax and soak, having a nice drink while at it.
My dragon wants nothing to do with water, she won't drink from anything. I mist her greens and make sure her feeder insects are feed good so they have some juice in them.
If they will eat it, watermelon or other juicy fruits are a good treat once in a while to give some some extra water.
I've even added a few bits of iceberg lettuce to my girls salad, I consider it water in solid form and isn't used for actual food since its low in nutritional value.