参见文档：

https://www.dolphindb.cn/cn/help/FunctionsandCommands/CommandsReferences/g/grant.html?highlight=grant

grant(`group1, TABLE_READ, "dfs://db1/表1")

grant(`group1, TABLE_READ, "dfs://db1/表2")

grant(`group1, TABLE_READ, "dfs://db1/表3")

grant(`group1, TABLE_READ, "dfs://db1/表4")