创建集合,相当于创建表 db.createCollection(“user”, {size: 20, capped: 5, max: 100});//创建成功会显示{“ok”:1} 查询集合下记录,相当于查询表(select * from table) db.user.find(); 添加集合数据,相当于insert,save的时候,如果数据库存在记录会执行update操作,insert就会忽略掉 db.user.save({n...
showtablesin databaseshowtablesin database limit 执行顺序yscl博主的博文mysql好文推荐:执行顺序中每一个步骤都为下一个步骤创建一个虚拟表命令行查看所有的数据库SHOWDATABASES2. 选择一个名字叫database的数据库USE database3. 查看数据库中所有可用表SHOWTABLES4. 查看用户表user的字段SHOWCOLUMNS FROM user或者...
<a href="https://www.mongodb.com/" target="_blank" rel="noreferrer"> <img src="https://raw.githubusercontent.com/devicons/devicon/master/icons/mongodb/mongodb-original-wordmark.svg" alt="mongodb" width="40" height="40"/> </a> <a href="https://www.mysql.com...
1.查询语法 SHOWTABLESTATUS[{FROM | IN} db_name][LIKE 'pattern' | WHERE expr] 2.查询语句说明 {FROM | IN} db_name, 可选项,表示查询哪个数据库下面的表信息。 LIKE'pattern'|WHERE expr ,可选项,可指定符合条件的表;LIKE'pattern' 可指定表名;WHERE expr,可通过 返回输出字段like来指定符合条件的...
show_slave_status_send_data函数将数据发送到 Master_info 的客户端,这部分涉及的锁相对较多,对应文件为mysql-5.7.41\sql\rpl_slave.cc。 代码语言:javascript 复制 boolshow_slave_status_send_data(THD*thd,Master_info*mi,char*io_gtid_set_buffer,char*sql_gtid_set_buffer){...mysql_mutex_lock(&mi->...
show tables或show tables from database_name; // 显示当前数据库中所有表的名称 show databases; // 显示mysql中所有数据库的名称 show...show grants for user_name@localhost; // 显示一个用户的权限,显示结果类似于grant 命令 show index from table_name; // 显示表的索引...show status; // 显示一...
This command displays the IPv6 routing table. Example 1 ise/admin# show ipv6 route Destination Gateway Iface --- --- --- 2001:DB8:cc00:1::/64 2001:DB8:cc00:1::1 eth0 ff02::1:2/128 ff02::1:2 eth0 ise/admin# Example 2 ...
Inspired in part by what would have been nice to have while @augustuswm and I were debugging failed instances on the colo rack a few days ago, this branch adds additional data to the omdb db instan...
Show Foreign Keys of a Table in MySQL To fetch the foreign keys of a table in MySQL, we use the following block of code: SELECTTABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME,REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAMEFROMINFORMATION_SCHEMA.KEY_COLUMN_USAGEWHEREREFERENCED_TABLE_SCHEMA='<database>'ANDRE...
开发者ID:pentaho,项目名称:pentaho-mongodb-plugin,代码行数:27,代码来源:MongoDbOutputDialog.java 示例2: checkForUnresolved ▲点赞 3▼ importorg.pentaho.di.ui.core.dialog.ShowMessageDialog;//导入依赖的package包/类privatebooleancheckForUnresolved( MongoDbInputMeta meta, String title ){ ...