--last_value 接近 max_value,表示序列快用完了SELECT*FROMpg_sequenceswherelast_valueisnotnullorderbylast_valuedesc;
last_value | bigint | 1 start_value | bigint | 1 increment_by | bigint | 1 max_value | bigint | 9223372036854775807 min_value | bigint | 1 cache_value | bigint | 1 log_cnt | bigint | 0 is_cycled | boolean | f is_called | boolean | f Owned by: public.tbl_serial.a 其实...
fsmpage->fp_nodes[nodeno]=value;//更新当前节点do{...nodeno=parentof(nodeno);lchild=leftchild(nodeno);rchild=lchild+1;newvalue=fsmpage->fp_nodes[lchild];if(rchild<NodesPerPage)//右子节点存在,则选取最大值作为父节点的新值newvalue=Max(newvalue,fsmpage->fp_nodes[rchild]);oldvalue=fsmpage...
若插入的列值不在指定的list分区范围内就会报错,为避免这种情况,使用list分区时可创建一个default分区。default 分区用来存储那些不在指定范围内的记录,类似于range分区的maxvalue分区。 partition by list (sex) --根据性别分区 ( partition l1 values('男'), partition l2 values('女'), partition l3 values(de...
CREATESEQUENCEoldgeek_test_seqINCREMENTBY1MAXVALUE99999999STARTWITH1NOCYCLE; 删除序列 代码语言:javascript 代码运行次数:0 运行 AI代码解释 drop sequence oldgeek_test_seq; 定义表: 3种方法 方法一:定义表时不指定序列 代码语言:javascript 代码运行次数:0 ...
max_value | bigint | 9223372036854775807 min_value | bigint | 1 cache_value | bigint | 1 log_cnt | bigint | 0 is_cycled | boolean | f is_called | boolean | f Owned by: public.tbl_xulie.id 1. 2. 3. 4. 5. 6. 7. ...
MAX(year_value) max_year_value FROM land_cover GROUP BY country_name, large_subnational_region_name, small_subnational_region_name ) AS lcmyv ON lcm.country_name = lcmyv.country_name AND lcm.large_subnational_region_name = lcmyv.large_subnational_region_name AND ...
distinct,sum,max/min,group by /having 安装并配置,并设置远程登陆的用户名和密码 1 .安装postgreSQL sudo apt-get update主程序:sudo apt-get install postgresql数据库图形界面:sudo apt install pgadmin3在Ubuntu下安装Postgresql后,会自动注册为服务,并随操作系统自动启动。 在Ubuntu下安装Postgresql后,会自动添加...
定义一个新序列发生器。CREATE [ TEMPORARY | TEMP ] SEQUENCE name [ INCREMENT [ BY ] increment ] [ MINVALUE minvalue | NO MINVALUE ] [ MAXVALUE maxvalue | NO MAXVALUE ] [ START [ WITH ] start ] [ CACHE cache ] [ [ NO ] CYCLE ]CREATE TABLE定义一个新表。
constpsqlorm =require('psqlorm');constpg =require('pg');constpgdb =newpg.Pool({database:'DATABASE',user:'USERNAME',password:'PASSWORD',host:'localhost',//连接池最大数量max:10});//pqorm.db 就可以访问pgdb。constpqorm =newpsqlorm(pgdb); ...