https://stackoverflow.com/questions/2967176/where-is-svn-exe-in-my-machine
The subversion program code is linked into the TortoiseSVN binary.
You can install a compatible discrete version if you need to access the repository from the command line.
UPDATE: Recent versions of the TortoiseSVN package can install a discrete svn.exe in addition to the one linked into the GUI binary.
It is located in the same bin directory where the main program is installed.
(If you have already installed TortoiseSVN, then rerun the installer, select Modify, and select command line tools for installation.)
下图中的第二个选项，打叉的图标右侧的向下的小三角符号，点击一下，就会弹出选项
