连接数据库
（1）设置防火墙
要连接数据库，首先要打开防火墙上1433端口，也就是,增加tcp端口1433到公共区域，并且永久生效。
- [root@localhost Desktop]# firewall-cmd --zone=public --add-port=1433/tcp --permanent
- success
- [root@localhost Desktop]# firewall-cmd --reload
- success
（2）下载客户端工具的源、安装客户端工具
可以参考这个文章：安装sql server的客户端工具
也是非常简单的，先下载，然后安装
。
- [root@localhost Desktop]# curl https://packages.microsoft.com/config/rhel/7/prod.repo > /etc/yum.repos.d/msprod.repo
- % Total % Received % Xferd Average Speed Time Time Time Current
- Dload Upload Total Spent Left Speed
- 100 193 100 193 0 0 106 0 0:00:01 0:00:01 --:--:-- 106
- [root@localhost Desktop]# yum install -y mssql-tools
- Loaded plugins: fastestmirror, langpacks
- packages-microsoft-com-prod | 2.9 kB 00:00:00
- packages-microsoft-com-prod/primary_db | 4.6 kB 00:00:01
- Loading mirror speeds from cached hostfile
- * base: mirrors.aliyun.com
- * extras: mirrors.aliyun.com
- * updates: mirrors.163.com
- Resolving Dependencies
- --> Running transaction check
- ---> Package mssql-tools.x86_64 0:14.0.1.246-1 will be installed
- --> Processing Dependency: msodbcsql for package: mssql-tools-14.0.1.246-1.x86_64
- --> Running transaction check
- ---> Package msodbcsql.x86_64 0:13.0.1.0-1 will be installed
- --> Processing Dependency: unixODBC-utf16 for package: msodbcsql-13.0.1.0-1.x86_64
- --> Processing Dependency: libodbcinst.so.2()(64bit) for package: msodbcsql-13.0.1.0-1.x86_64
- --> Running transaction check
- ---> Package unixODBC-utf16.x86_64 0:2.3.1-1 will be installed
- --> Finished Dependency Resolution
- Dependencies Resolved
- ===========================================================================================================================
- Package Arch Version Repository Size
- ===========================================================================================================================
- Installing:
- mssql-tools x86_64 14.0.1.246-1 packages-microsoft-com-prod 249 k
- Installing for dependencies:
- msodbcsql x86_64 13.0.1.0-1 packages-microsoft-com-prod 3.8 M
- unixODBC-utf16 x86_64 2.3.1-1 packages-microsoft-com-prod 329 k
- Transaction Summary
- ===========================================================================================================================
- Install 1 Package (+2 Dependent packages)
- Total download size: 4.4 M
- Installed size: 4.4 M
- Downloading packages:
- (1/3): mssql-tools-14.0.1.246-1.x86_64.rpm | 249 kB 00:00:03
- (2/3): unixODBC-utf16-2.3.1-1.x86_64.rpm | 329 kB 00:00:01
- (3/3): msodbcsql-13.0.1.0-1.x86_64.rpm | 3.8 MB 00:00:21
- ---------------------------------------------------------------------------------------------------------------------------
- Total 211 kB/s | 4.4 MB 00:00:21
- Running transaction check
- Running transaction test
- Transaction test succeeded
- Running transaction
- Installing : unixODBC-utf16-2.3.1-1.x86_64 1/3
- The license terms for this product can be downloaded from
- http://go.microsoft.com/fwlink/?LinkId=746838 and found in
- /usr/share/doc/msodbcsql/LICENSE.TXT . By entering 'YES',
- you indicate that you accept the license terms.
- Do you accept the license terms? (Enter YES or NO)
- yes
- Please enter YES or NO
- Do you accept the license terms? (Enter YES or NO)
- YES
- Installing : msodbcsql-13.0.1.0-1.x86_64 2/3
- The license terms for this product can be downloaded from
- http://go.microsoft.com/fwlink/?LinkId=746949 and found in
- /usr/share/doc/mssql-tools/LICENSE.txt . By entering 'YES',
- you indicate that you accept the license terms.
- Do you accept the license terms? (Enter YES or NO)
- YES
- Installing : mssql-tools-14.0.1.246-1.x86_64 3/3
- Verifying : msodbcsql-13.0.1.0-1.x86_64 1/3
- Verifying : unixODBC-utf16-2.3.1-1.x86_64 2/3
- Verifying : mssql-tools-14.0.1.246-1.x86_64 3/3
- Installed:
- mssql-tools.x86_64 0:14.0.1.246-1
- Dependency Installed:
- msodbcsql.x86_64 0:13.0.1.0-1 unixODBC-utf16.x86_64 0:2.3.1-1
- Complete!
（3）连接sql sever
这里用sqlcmd来连接sql server，下面是一些命令行参数。
- [root@localhost Desktop]# sqlcmd
- Microsoft (R) SQL Server Command Line Tool
- Version 14.0.0001.246 Linux
- Copyright (c) 2012 Microsoft. All rights reserved.
- usage: sqlcmd [-U login id] [-P password]
- [-S server or Dsn if -D is provided]
- [-H hostname] [-E trusted connection]
- [-N Encrypt Connection][-C Trust Server Certificate]
- [-d use database name] [-l login timeout] [-t query timeout]
- [-h headers] [-s colseparator] [-w screen width]
- [-a packetsize] [-e echo input] [-I Enable Quoted Identifiers]
- [-c cmdend]
- [-q "cmdline query"] [-Q "cmdline query" and exit]
- [-m errorlevel] [-V severitylevel] [-W remove trailing spaces]
- [-u unicode output] [-r[0|1] msgs to stderr]
- [-i inputfile] [-o outputfile]
- [-k[1|2] remove[replace] control characters]
- [-y variable length type display width]
- [-Y fixed length type display width]
- [-p[1] print statistics[colon format]]
- [-R use client regional setting]
- [-K application intent]
- [-M multisubnet failover]
- [-b On error batch abort]
- [-D Dsn flag, indicate -S is Dsn]
- [-X[1] disable commands, startup script, environment variables [and exit]]
- [-x disable variable substitution]
- [-? show syntax summary]
接下来查询当前是哪个库、创建了一个叫test的库、创建了一个叫tb的表、查询tb表的记录数。
- [root@localhost Desktop]# sqlcmd -S localhost -U sa
- Password:
- 1> select db_name();
- 2> go
- --------------------------------------------------------------------------------------------------------------------------------
- master
- (1 rows affected)
- 1> create database test;
- 2> go
- 1> use test;
- 2> go
- Changed database context to 'test'.
- 1> select * into tb from sys.tables;
- 2> go
- (1 rows affected)
- 1> select count(*) from tb;
- 2> go
- -----------
- 1
- (1 rows affected)
- 1>
（4）在windows上用Microsoft SQL Server Management Studio（ssms）连接
连接上sql server，查询表tb的数据。
另外，可以在Linux中查询当前连接到sql server的会话，发现有sqlcmd命令，还有ssms，在看看hostprocess进程号就是3228.
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