mysql 运用锦集

1 alter table t_user 
2  change creator_id      creator_id      int         default 0                   not null comment ‘创建人id‘ AFTER user_name
3 ,change creator_name    creator_name    varchar(20) default ‘‘                  not null comment ‘创建人名称‘ AFTER creator_id
4 ,change create_time     create_time     datetime    default CURRENT_TIMESTAMP   not null comment ‘创建时间,制单时间‘ AFTER creator_name
5 ,change deleted_flag    deleted_flag    tinyint(1)  default 0                   not null comment ‘逻辑删除标志  0:未删除  1:已删除‘ AFTER create_time

alter table t_student  add  user_name   varchar(100)  default ‘‘  not null comment ‘姓名‘ after code;

1 ALTER TABLE pop_stock_out ADD INDEX idx_company_out_time(company_info_id, out_time)
2 ,ADD INDEX idx_create_time(create_time)
3 ,ADD INDEX idx_out_time(out_time);

truncate table t_user;                -- 清空数据

drop table if exists t_user;