启动docker容器时报错:iptables failed: iptables wait t nat A DOCKER p tcp d 0/0 dport 5000 j DNAT todestination 172.18.0.4:5000 ! i brff45d935188b: iptables: No chain/target/match by that name. (exit status...
SELECT a.dev\_id,SUBSTRING\_INDEX(SUBSTRING\_INDEX(a.stage,',',b.help\_topic_id+1),',',1) FROM my_table a JOIN mysql.help_topic b ON b.help\_topic\_id < (LENGTH(a.stage) LENGTH(REPLACE(a....
MySQL巧妙利用help_topic表把以逗号分隔的字符串转换成行脚本:```sqlselect substring_index(substring_index('82,83,84,85,86',',',help_topic_id+1),',',1) as Id from mysql.help_topic where help_topic_id<(length('82,83,84,85...
help_topic表是数据库mysql下的一个表 SUBSTRING_INDEX(s, delimiter, number) 返回从字符串 s 的第 number 个出现的分隔符 delimiter 之后的子串。 1. 如果 number 是正数,返回第 number 个字符左边的字符串。 SELECT SUBSTRING_I...
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