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": "MongoDB"}{"_id": 104, "name": "Liang", "title": "MongoDB"}Save () methodThe Save () method replaces an existing document with an incoming document. The syntax format is as follows:Db.collection.save ({Writeconcern: })Db.mycol3.insert ({"_id": +, "name": "Liang", "title": "MongoDB"})Db.mycol3.save ({"_id": +, "name": "Liang2", "title": "MongoDB2"})Db.mycol3.find (){"_id": +, "name": "Liang2", "title": "MongoDB2"}more examplesUpdate only the first record:Db.col.update ({"Count": {$gt: 1}}, {$s
Tags:. exe info base class MIL configuration share Run databaseOracle 10G Installation Guide 1, unzip the file 10201_database_win32.zip, and double-click the Setup.exe directory, the installation interface appears as follows: 2, Enter the password and confirm the password, such as:password, click Next, the following progress bar appears, Note: This password is the administrator password. 3, check the prerequisites, select the Red box as shown in the selection box, such as: 4, click "
...Copying oraenv To/usr/local/bin ...Copying coraenv To/usr/local/bin ...Creating/etc/oratab file ...Entries'll be added to The/etc/oratab file as needed byDatabase Configuration Assistant When a database is createdFinished running generic part of root.sh script.Now product-specific root actions would be performed.[Email protected] ~]#The database is in a startup state after installation endsIn the command behavior Scott user unlocks:Sql>conn/as SYSDBA Switch to system administratorSql>alter u
Service (monitoring service) for restart operation8. Configure the TestStart with attachment, command prompt, enter command: tnsping instance name, for example: this example-tnsping dg4msql9. Create DblinkTo create a dblink condition:1. Look at having dblink processing authority;Log in to the SYS user to view2. Give creation permission, under normal circumstances give droppublic DATABASE link, create publicdatabase link can be;Grant DROP public databaselink,create publicly DATABASE LINK to Scot
, change Login:Tested successfully,As with Oarcle, right-click Compatibility opens without repeating:Select the installation path, Next:The general meaning of the error is: The installation path can not have spaces and special characters, modified:Next, no error:All users, Next:Click Next and the installation is complete.Test log on to Oracle with PL/sql:Error (blank window): This is generally due to insufficient permissions to close the open window of PL/SQL. Right-click PL/SQL Desktop shortcut
1 Opening VirtualBox2 to locate the imported virtual machine3 Right-click Virtual machine Startup4 Waiting to load5 when loading, open Xshell67 fill in the contents of the boxName: Take It YourselfHost: 127.0.0.1 Fixed contentPort number: 1234 Fixed content8910 Select Accept and save (no eject, no tube)11 Enter User nameUser name: XXX fixed contentTick Remember user name12 Enter passwordPassword: xxxxxx fixed contenttick the remember password13 Click OK14 Connection SucceededPrecautionsShown as
:
Syntax:
create [temporary] table [IF not EXISTS] Tbl_ Name
(create_definition,...)
[Table_options]
[Partition_options]
Or:
CREATE [temporary] TABLE [IF not EXISTS] tbl_name
[(create_definition,...)]
[Table_options]
[Partition_options]
select_statement
Or:
CREATE [temporary] TABLE [IF not EXISTS] tbl_name
{like Old_tbl_name | (like Old_tbl_name)}
......
One more example, like to see how to write the user grant syntax. Mysql>? Grant
Name: ' Grant '
Descriptio
output object to another command as its input.As a result, PowerShell provides a familiar interface for users who have used other shell handlers and introduces new powerful command-line examples. It allows you to send objects instead of text, extending the concept of sending data between commands. easily convert to scriptsWith PowerShell, you can easily convert to create and run scripts from interactively typing commands.you can type commands at the PowerShell command prompt to discover the com
the root directory (/).
Relative path: The name of the file in relation to the current path. For example./home/oldboy/exam.py or. /.. /home/oldboy/exam.py, simply speaking, as long as the beginning is not/, is the relative path
So you have to understand that the relative path is represented by the relative path to your current path.For example, you are now in the/home directory, such as to enter the/var/log path, how to write it?
Cd/var/log (absolute path)
Cd.. /var/log (r
/mysql/my.cnf and enter the following configuration#错误日志目录Log-error =/data/mysql/3306/mysql_error.log#二进制日志目录Log-bin =/data/mysql/3306/binlog/binlog#InnoDB Cache data Size (index, lock, insert buffer, data dictionary, etc.)#推荐设置为物理内存的25%-50%Innodb_buffer_pool_size = 1G#InnoDB共享表空间初始化大小Innodb_data_file_path = Ibdata1:1g:autoextend#每次事务提交或事务外的指令都需要将日志写入硬盘, set to 1 more secureInnodb_flush_log_at_trx_commit = 1#InnoDB日志缓存Innodb_log_buffer_size = 64MHelpful when #InnoDB a lot of write operationsInno
modify the following variable contents:)
basedir=/usr/local/mysql
Datadir=/home/mysql/data(5) initializing MySQL database/usr/local/mysql/scripts/mysql_install_db--defaults-file=/etc/my.cnf \ (configuration file path)
--basedir=/usr/local/mysql \ (MySQL main program installation path)
--datadir=/home/mysql/data \ (data store path)
--user=mysql4. start MySQLService mysqld start or/etc/ini.d/mysqld start5. set MySQL access rights(1) to set a password for the root user/usr/local/mysql/bin/
The younger brother is really excited to see the series of Android blogs of other Daniel on the csdn blog. So after some ideological struggles, the younger brother finally wants to write a series of blogs. I decided to thoroughly study the android SDK documentation and share and exchange with you through blog posts. Haha, it's time to think about it!
This is the first attempt. This article mainly introduces the structure and usage of the android SDK d
The "Editor's note" Computer software is traditionally defined as: Software is another part of the computer system that is dependent on the hardware, and the software includes a complete set of programs, data, and related documents. In today's development, however, the compliance of documents is often overlooked. This article, written by Todd Waits, describes the 3 major challenges encountered in application documentation and is expanded below. This p
the jquery method is arranged in the order they appear on the page. Others (Miscellaneous) jquery. browser are centered on the browser engine (jquery. browser document, commit). For example, you can use jquery. browser. WebKit to detect whether the engine is WebKit. Improved processing of applets (commit 1, commit 2) jquery no longer tries to bind events or data to Java applets (binding events or data may cause errors ). Arguments is no longer used. in order to comply with the requirements of C
development at the terminal, they generally do not like leaving the terminal, check out can continue to encode, the use go doc of commands is a good choice.
➜ hello go help docusage: go doc [-u] [-c] [package|[package.]symbol[.method]]Doc prints the documentation comments associated with the item identified by itsarguments (a package, const, func, type, var, or method) followed by a one-linesummary of each of the first-level items "under" that item
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