数据库错误:

错误代码:
201

错误信息:
无法连接数据库服务器! php_network_getaddresses: getaddrinfo failed: Name or service not known
数据库错误:

错误代码:
203

错误信息:
select count(*) from orders where uid='' and courseid ='572' php_network_getaddresses: getaddrinfo failed: Name or service not known
数据库错误:

错误代码:
203

错误信息:
select distinct(c.id),c.*,u.username teachername,ors.uid as isAdd,
cc.name catename,i.name institutionname,i.uid institutionuid,
u.id tuid,count(cr.courseid) eval_num from course c
left join user u on u.id=c.teacher
left join institution i on c.agencies_id = i.id
left join course_category cc on c.category = cc.id
left join orders ors on c.id = ors.courseid and ors.uid = '0' and ors.status=2 and ors.is_del=0
left join course_review cr on c.id=cr.courseid and cr.is_del=0
where c.id = '572' and c.status=3 group by cr.courseid php_network_getaddresses: getaddrinfo failed: Name or service not known
数据库错误:

错误代码:
203

错误信息:
SELECT COUNT(*) nowlearn FROM `orders` WHERE courseid=572 AND status=2 and is_del=0 php_network_getaddresses: getaddrinfo failed: Name or service not known
数据库错误:

错误代码:
203

错误信息:
SELECT u.id,u.avatar_small,a.name city,count(c.id) totalcourse FROM
(user u LEFT JOIN area a ON u.city = a.id)
left join course c on u.id=c.teacher
where u.id='' group by u.id php_network_getaddresses: getaddrinfo failed: Name or service not known
数据库错误:

错误代码:
203

错误信息:
select count(id) totallearners from learner where tid='' php_network_getaddresses: getaddrinfo failed: Name or service not known
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