Set from different databases by way

sql server

IF OBJECT_ID('Autotest.SA.CUSTOMER','U') is not null
    Drop table Autotest.SA.CUSTOMER;
CREATE TABLE Autotest.SA.CUSTOMER (
customer_id int IDENTITY (1,1) PRIMARY KEY ,
c_custkey nVarChar(50) default '',
c_mktsegment nVarChar(50) default '',
c_privilege_level int
);

Use IDENTITY (m, n)
- m represents the initial value, n represents the value automatically increases every time
- Values of m and n is not specified, the default is (1,1)

mysql
- ```
drop table if exists Autotest.CUSTOMER;

CREATE TABLE autotest.CUSTOMER (
customer_id int auto_increment PRIMARY KEY,
c_custkey nVarChar(50) default '',
c_mktsegment nVarChar(50) default '',
c_privilege_level int
);
```
- Use auto_increament
  - Index must be specified, the above example defines the primary key index with PRIMARY KEY
  - The default increment starting from 1　　
  - Set the self-energizing start value n: alter table table_name AUTO_INCREMENT = n

Oracle

Establish increment sequence by sequence triggers +
Create a table

create table SYSTEM.customer(
id int not null PRIMARY KEY,
column1 varchar(50) null,
column2 varchar(50) null
)

Creating a Sequence

create sequence seq_perftest
minvalue 1
maxvalue 99999999
start with 1
increment by 1
cache 50

drop sequence seq_perftest

　　Starting value of 1, in increments of 1

Creating Triggers

create or replace trigger "perfest_trig"
    before insert on SYSTEM.customer
    for each row
begin
  select seq_perftest.nextval into :new.id from dual;
end;

Verify whether the entry into force increment insert into system.customer (column1, column2) values ( 'test1', 'test2')
Batch production procedure stored data

create procedure system.pro_test(
init in number,
loop_time in number
)
IS
vars number;
i INTEGER;
begin 
 vars := 0; 
 i := init;
  while vars<loop_time loop
   insert into system.customer(column1,column2) values (('test'||i),('test'||i)
    i := i+1;
    vars := vars+1;
  end loop;
  commit;
end pro_test;

exec system.pro_test (1,100000)

Hana

To create a custom sequence increase by
Create a table

 create table SYSTEM.customer(
id int,
column1 varchar(50) null,
column2 varchar(50) null
);

Creating a Sequence

create sequence system.seq_perftest
increment by 1
maxvalue 99999999
minvalue 1
NO CYCLE
start with 1;


drop sequence seq_perftest;

Verify whether the entry into force increment insert into system.customer (id, column1) values (system.seq_perftest.nextval, 'test123')
Using stored procedures to increase bulk data

create procedure system.pro_test(
i INTEGER,
loop_time INTEGER
)
As
begin 
  For i in 1 .. loop_time DO
   insert into system.customer(id,column1,column2)values (system.seq_perftest.nextval,('test'||i),('test'||i);
    i := i+1;
  end FOR;
end;



call system.pro_test(1, 100000)

Set from different databases by way

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