云数据库 GAUSSDB-CREATE SEQUENCE:示例

时间：2024-11-02 18:51:21

云数据库 GAUSSDB

示例

创建一个名为serial的递增序列，从101开始：

  
       openGauss=# CREATE SEQUENCE serial
 START 101
 CACHE 20;

从序列中选出下一个数字：

  
       openGauss=# SELECT nextval('serial');
 nextval 
 ---------
      101

从序列中选出下一个数字：

  
       openGauss=# SELECT nextval('serial');
 nextval 
 ---------
      102

创建与表关联的序列：

  
   
     
     
       openGauss=# CREATE TABLE customer_address
(
    ca_address_sk             integer               not null,
    ca_address_id             char(16)              not null,
    ca_street_number          char(10)                      ,
    ca_street_name            varchar(60)                   ,
    ca_street_type            char(15)                      ,
    ca_suite_number           char(10)                      ,
    ca_city                   varchar(60)                   ,
    ca_county                 varchar(30)                   ,
    ca_state                  char(2)                       ,
    ca_zip                    char(10)                      ,
    ca_country                varchar(20)                   ,
    ca_gmt_offset             decimal(5,2)                  ,
    ca_location_type          char(20)                     
);

openGauss=# CREATE SEQUENCE serial1
 START 101
 CACHE 20
OWNED BY customer_address.ca_address_sk;
--删除序列
openGauss=# DROP TABLE customer_address;
openGauss=# DROP SEQUENCE serial cascade;
openGauss=# DROP SEQUENCE serial1 cascade;

      

    

  
 