https://jingyan.baidu.com/article/eb9f7b6d367679869364e8d4.html…

通过原生kafka,查看对应的topic是否有数据 下载kafka:登录Apache kafka官方下载 http://kafka.apache.org/downloads.html 配置config文件 vim server.properties 启动kafka: ./kafka-server-start.>/dev/>& & # kafka-server-start.sh 脚本在 kafka_2.-/bin路径下 查看已创建的topic列表: ./kafka-topics.…

##查看所有表信息 SELECT * FROM information_schema.TABLES WHERE TABLE_SCHEMA = 'pcms-zgh20190327' ##查看各个表数据量 SELECT table_name,table_rows FROM information_schema.tables WHERE TABLE_SCHEMA = 'pcms-zgh20190327' ORDER BY table_rows DESC;…

在使用桦仔的分享一个SQLSERVER脚本(计算数据库中各个表的数据量和每行记录所占用空间)的脚本时,遇到下面一些错误 这个是因为这些表的Schema是Maint,而不是默认的dbo,造成下面这段SQL在执行EXEC sp_spaceused @tablename时出现 Msg 15009, Level 16, State 1, Procedure sp_spaceused, Line 75 The object 'xxxx' does not exist in database 'YourSQ…

以下均为开发测试环境下: 启动Zookeeperbin/zookeeper-server-start.sh config/zookeeper.properties &启动kafkabin/kafka-server-start.sh config/server.properties创建topicbin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic r…

答:使用md工具 md.b $address $count (从地址$address处显示$count个字节的数据,b=byte,8位) md.w $address $count (从地址$address处显示$count个字的数据,w=word,16位) md.l $address $count (从地址$address处显示$count个双字的数据,32位,默认读取单位为32位)…

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源地址:http://blog.csdn.net/zhanggnol/article/details/6683697 select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; 还可以直接查看dblink的:select t.table_name,t.num_rows from user_tables@dblink t ORDER BY NUM_ROWS DESC;…

源地址:http://blog.csdn.net/zhanggnol/article/details/6683697 select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; 还可以直接查看dblink的:select t.table_name,t.num_rows from user_tables@dblink t ORDER BY NUM_ROWS DESC;…

select t.table_name,t.num_rows from user_tables t ORDER BY NUM_ROWS DESC; 还可以直接查看dblink的:select t.table_name,t.num_rows from user_tables@dblink t ORDER BY NUM_ROWS DESC;…