Gbase 8s database basic syntax

        

        GBase It is a database product of its own brand launched by NANDA General Data Technology Co., Ltd , In the domestic database market, it has a high Brand awareness .GBase The range of products includes ： New analytical database GBase 8a、 Distributed parallel database cluster GBase 8a Cluster、 High end transactional database GBase 8t、 High speed memory database GBase 8m/AltiBase、 Visual business intelligence GBaseBI、 Large directory service system GBase 8d、 Hard encrypted secure database GBase 8s

        GBase 8s It is a secure database product with completely independent intellectual property rights , Fully meet the safety model and safety requirements of the third level of the national standard . The product adopts domestic cryptographic algorithm and hardware encryption technology , Provide encryption including data storage 、 Data transmission encryption 、 Safety labels 、 Enforce access control 、 Separation of powers 、 Main security functions including security audit .GBase 8s Has been issued by the Ministry of public security 《 Computer information system security products sales license 》, Issued by the state secret service 《 Business password product model certificate 》、《 Password detection certificate 》 as well as China Information Security Certification Center Issued by the CCIS Certification certificate .

One 、 Create a class

 1、 Syntax for creating views ：

create view [if exists] <view_name> as <query_define>;

 2、 Syntax for creating tables ：

create table [if not exists] <table_name> ( ColumnName1 data_type1,ColumnName2 data_type2,....);

3、 Create database ：

create database [if not exists] <databasename>;

 4、 New column syntax in the table ：

alter table <tablename> add (NewColumnName1 date_tye1[,NewColumnName2 date_tye2,....]) [before OldColumeName];

Two 、 Rename class

1、 Syntax of database rename ：

rename database <old_db_name> to <new_db_name>;

 2、 Rename the syntax of existing columns in the table :

rename column <table_name> <oldColumnName> to <newColumnName>;

3、 Rename table name ：

rename table <old_tablename> to <new_tablename>;

3、 ... and 、 Delete class

        Database non-existent 、 Currently operating Database、 Modified name Database on , These feelings You cannot delete or modify the current database .

1、 Delete database Syntax ：

drop database [if exists] <db_name>;

2、 Syntax for deleting Columns ：

alter table <tablename> drop ( OldColumnName1[,OldColumnName2,.....] );

 3、DELETE Delete Syntax ：

delete from <table_name> [where condition];
 perhaps 
delete  <table_name> [where condition];

Four 、 Insert class

1、INSERT Basic grammar :

insert into <table_name > [column_name1, column_name2…] values(value1,value2…);

2、INSERT Advanced Grammar :

insert into <table_name> [column_name1, column_name2…] select col_name1, col_name2,…