There are clamps made with a rubber liner that do fix some leaky pipes. But, they do not work at the threaded/grooved end of pipes. those leaks will just get worse. the pipe clamps are for temporary repair, you will end up replacing the leaking pipe. Note that if you get just enough pipe/fittings to replace the leaker, you will probably find that when the pipe is removed, and replaced, there will be more leaks. We always exclude any pipe repair/replacement that is not noted on our original estimate.
That's exactly what happened to me last weekend. I had done some hammering on a stud below a joint, and a few days later I just happened to notice that the pipe was hanging low, and wanted to place a clamp/strap on it. When I pushed up on the pipe, the joint started to leak.
As I started preparing the section for replacement, another joint just broke off.
I ended up having to replace about 35ft of pipe with 3/4" copper.
It was 80yr old plumbing.
Always buy more pipe/fittings than you need for the job.