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比方说我有1000个database，想要删除其中所有以a开头的数据库，请问怎么操作？（注意是database不是collection）
ringa_lee
It requires a little skill, but it’s not troublesome, just a script:
db.runCommand({listDatabases: 1}).databases.forEach(function(database) { if(database.name.match(/^a/)) { db.getDB(database.name).dropDatabase(); } });
Probably just pass listDatabase得到所有的库，然后从中找到符合你条件的库，然后dropDatabase()删除掉。注意避开关键的系统库，比如local, config, admin and wait
listDatabase
dropDatabase()
local
config
admin
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
It requires a little skill, but it’s not troublesome, just a script:
Probably just pass
listDatabase得到所有的库，然后从中找到符合你条件的库，然后dropDatabase()删除掉。注意避开关键的系统库，比如
local,config,adminand wait