使用flink sql写一个pv，uv统计

我可以给你一个示例代码：// 创建一个TableEnvironment
TableEnvironment tableEnv = TableEnvironment.create(env);// 注册一个表
tableEnv.registerTableSource("myTable", new MyTableSource());// 创建一个Table
Table myTable = tableEnv.scan("myTable");// 计算PV
Table pv = myTable
.groupBy("pageID")
.select("pageID, count(*) as pvCount");// 计算UV
Table uv = myTable
.groupBy("userID")
.select("userID, count(*) as uvCount");// 打印结果
Table result = pv.join(uv).select("pageID, pvCount, uvCount");
result.printSchema();