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领取时间：2019/04/17
领取条件：问题上榜“最受欢迎关注问题”榜单
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How to insert data to mongodb on centos 7
insert & read data to mongodb > use lanzhou switched to db lanzhou > db.wuwei.save( { a: 1 } ) WriteResult({ "nInserted" : 1 }) > db.wuwei.find() { "_id" : ObjectId("5f0faebe2d6...
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How to use the permission model of mongodb
connect to mongodb server without authentication parameter [lwk@qwfys:~]$ mongo --host 192.168.3.88 MongoDB shell version v4.2.8 connecting to: mongodb://192.168.3.88:27017/?com...
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install mysql 5.7 to Linux Mint 19.0
install lwk@qwfys:~$ apt install mysql-server mysql-client mysql-workbench Reading package lists... Done Building dependency tree Reading state information... Done The following...
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mysql in action / alter table
change character set ALTER SCHEMA `employees` DEFAULT CHARACTER SET utf8mb4 DEFAULT COLLATE utf8mb4_general_ci ; ALTER TABLE `employees`.`t2` CHARACTER SET = utf8mb4 , COLLAT...
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man mysql
lwk@qwfys ~ $ man mysql > mysql.txt lwk@qwfys ~ $ cat mysql.txt MYSQL(1) MySQL...
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mysql in action
修改表字符集 ALTER TABLE `database_name`.`table_name` CHARACTER SET = utf8mb4 , COLLATE = utf8mb4_general_ci ;...
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