Question

INSERT INTO ip_cpu_mn(datetime, resource_id, ipaddress,cpu_utilization)
SELECT cpu_mn.datetime, resource_id, ipaddress, cpu_utilization
FROM dblink('host=10.0.32.175 user=postgres password=postgres dbname=TNPM_EXT','SELECT datetime, resource_id, ipaddress,cpu_utilization  FROM ext_ip.cpu_mn WHERE datetime >=(now() - interval '30 minutes')')
AS cpu_mn(datetime timestamp without time zone, resource_id numeric(10,0), ipaddress character varying(20), sysname character varying(100), cpu_utilization numeric(6,2))

您运行以上查询并获得以下错误：

psql.bin：/home/samila/SQL_SMZ/ip_cpu_mn1.sql:15:错误：语法错误在或附近＆＃34; 30＆＃34;第6行：... xt_ip.cpu_mn WHERE datetime＆gt; =（now（） - 间隔＆＃39; 30分钟＆＃39; ...

任何人都可以帮助我吗？我尝试过很多方法，但同样的错误仍然有错误。

Answer 1

嫌疑人在您的查询中是单引号（'）（ERROR: syntax error at or near "30"非常清楚），您需要在此处添加两个引号now() - interval ''30 minutes''

INSERT INTO ip_cpu_mn(datetime, resource_id, ipaddress,cpu_utilization)
SELECT cpu_mn.datetime, resource_id, ipaddress, cpu_utilization
FROM dblink('host=10.0.32.175 user=postgres password=postgres dbname=TNPM_EXT','SELECT datetime, resource_id, ipaddress,cpu_utilization  FROM ext_ip.cpu_mn WHERE datetime >=(now() - interval ''30 minutes'')')
AS cpu_mn(datetime timestamp without time zone, resource_id numeric(10,0), ipaddress character varying(20), sysname character varying(100), cpu_utilization numeric(6,2))

使用dblink找错最后30分钟

1 个答案: