# 1.由于刚才已经关闭了数据库连接,需要重新创建Connection对象和Cursor对象 con = pymysql.connect(host='192.168.0.46', user='root', password='root', database='test', charset='utf8', use_unicode=True) cursor=con.cursor() print("select * from 配置表汇总 where `站点名称(局向)` like '"+sn...
数据库操作(DDL) --创建数据库createdatabasedb_name;--删除数据库dropdatabasedb_name;--切换数据库usedb_name;--查看当前选择的数据库selectdatabase(); 使用navicat新建表 在相应的数据库下,新建表,设置完字段信息后,保存,设置表明,右击新建的表,查看对象信息,点击DDL 表操作(DDL) 修改表: --创建一个stud...
method to remove some or all records from a table in a database. The X DevAPI provides additional methods to use with the delete() method to filter and order the records to be deleted. Delete Records Using Conditions The following example passes search conditions to the delete() method. ...
使用POST方式发送到URL的/query路径,参数q为CREATE DATABASE <new_database_name> curl-i-XPOSThttp://localhost:8086/query--data-urlencode"q=CREATE DATABASE mydb" 1. 使用HTTP接口写数据 通过HTTP接口POST数据到/write路径是我们往InfluxDB写数据的主要方式 curl-i-XPOST'http://localhost:8086/write?db=m...
mysql>callinsert_user_data(100000);QueryOK,0rowsaffected(6.69sec) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 # ls-lh user.ibd-rw-r---1mysql mysql 14M Nov610:58/data2/mysql/test/user.ibd # python2 py_innodb_page_info.py-v/data2/mysql/test/user.ibd page...
--database=poempp 数据库名 例如:poempp /var/lib/mysql/mysql-bin.000003 binlog日志文件按你时间去选择恢复的数据,一般是最新的那个,除非你是要恢复之前的数据库,mysql-bin文件一般都在这个目录下/var/lib/mysql/ /usr/bin/mysql -uroot -p*** -v poempp登录数据库 ...
Built-in ingestion tools for Apache Spark/Apache Flink users. Supports half-dozen file formats, database change logs and streaming data systems. Connect sink for Apache Kafka, to bring external data sources. Storage Optimized storage format, supporting row & columnar data. ...
The instructions provided below describe how to achieve this goal using a Python script. The following script automates this process for all feature classes in a geodatabase, including feature classes stored in a feature dataset. Note: Perform the procedure in the 32-bit version of Python. ...
At some point in your journey as a Python developer, you will come across the need to delete data from a MySQL database. This may seem like a daunting task, but
Since MongoDB 5.0, the drop command and the db.collection.drop() method will return an error if you attempt to drop a collection in the admin database or the config database from a mongos. Connect to the config server instead and run the command to delete these collections. Syntax: db...