SQL Server 2017 : T-SQL Basic Operation
2017/10/05 |
This shows Transact-SQL (T-SQL) Basic Operation.
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[1] | Create/Delete Databases. |
[root@dlp ~]# sqlcmd -S localhost -U SA Password: # create [SampleDB] database 1> create database SampleDB; 2> go # create a database with parameters 1> create database SampleDB2 2> on primary ( 3> name = 'SampleDB2', 4> filename = '/var/opt/mssql/data/SampleDB2.mdf', 5> size = 5GB, 6> maxsize = unlimited, 7> filegrowth = 10MB 8> ) 9> log on ( 10> name = 'SampleDB2_log', 11> filename = '/var/opt/mssql/data/SampleDB2_log.ldf', 12> size = 1GB, 13> maxsize = 2GB, 14> filegrowth = 5% 15> ) 16> go # list databases 1> select name, create_date from sys.databases; 2> go name create_date -------------------------- ----------------------- master 2003-04-08 09:13:36.390 tempdb 2017-10-05 13:24:39.140 model 2003-04-08 09:13:36.390 msdb 2017-08-22 19:39:22.887 SampleDB 2017-10-05 19:22:42.643 SampleDB2 2017-10-05 19:30:49.513 (6 rows affected) # delete [SampleDB2] database 1> drop database SampleDB2; 2> go |
[2] | Create/Delete Tables. |
# connect to SQL Server with a database [root@dlp ~]# sqlcmd -S localhost -U SA -d SampleDB Password: # create [Sample_Table] table 1> create table dbo.Sample_Table ( 2> Number nvarchar(10) not null, 3> First_Name nvarchar(50) not null, 4> Last_Name nvarchar(50) null, 5> Last_Update date not null 6> ) 7> go # list tables 1> select name from sysobjects 2> where xtype='u' 3> go name ------------------------- Sample_Table (1 rows affected) # delete [Sample_Table] table 1> drop table dbo.Sample_Table; 2> go |
[3] | Insert/Update/Delete Datas. |
[root@dlp ~]# sqlcmd -S localhost -U SA -d SampleDB Password: # insert data 1> insert into dbo.Sample_Table ( 2> Number, First_Name, Last_Name, Last_Update 3> ) 4> values ( 5> '00001', 'CentOS', 'Linux', '2017-10-05' 6> ) 7> go (1 rows affected) 1> select * from dbo.Sample_Table; 2> go Number First_Name Last_Name Last_Update ---------- ------------- ------------- ---------------- 00001 CentOS Linux 2017-10-05 00002 RedHat Linux 2017-10-05 00003 Fedora Linux 2017-10-05 00004 Ubuntu Linux 2017-10-05 00005 Debian Linux 2017-10-05 (1 rows affected) # show tables with specifying columns 1> select Number, First_Name from dbo.Sample_Table 2> go Number First_Name ---------- -------------------------------------------------- 00001 CentOS 00002 RedHat 00003 Fedora 00004 Ubuntu 00005 Debian (5 rows affected) # show top 3 datas 1> select top 3 * from dbo.Sample_Table 2> go Number First_Name Last_Name Last_Update ---------- ------------- ------------- ---------------- 00001 CentOS Linux 2017-10-05 00002 RedHat Linux 2017-10-05 00003 Fedora Linux 2017-10-05 (3 rows affected) # update data 1> update dbo.Sample_Table 2> set Last_Update = '2017-10-06' 3> where First_Name = 'Debian' 4> go (1 rows affected) 1> select * from dbo.Sample_Table where First_Name ='Debian' 2> go Number First_Name Last_Name Last_Update ---------- ------------- ------------- ---------------- 00005 Debian Linux 2017-10-06 (1 rows affected) # delete data 1> delete dbo.Sample_Table where First_Name ='Debian' 2> go (1 rows affected) 1> select * from dbo.Sample_Table where First_Name ='Debian' 2> go Number First_Name Last_Name Last_Update ---------- ------------- ------------- ---------------- (0 rows affected) |
[4] | It's also possible to run T-SQL directly like follows. |
[root@dlp ~]# sqlcmd -S localhost -U SA -Q 'select name,create_date from sys.databases' Password: name create_date ----------------------- ----------------------- master 2003-04-08 09:13:36.390 tempdb 2017-10-06 13:53:18.030 model 2003-04-08 09:13:36.390 msdb 2017-08-22 19:39:22.887 SampleDB 2017-10-05 19:22:42.643 (5 rows affected) |