如何在 JavaScript 数组中获取 MongoDB 数据库?
mongodbdatabasebig data analytics更新于 2026/1/27 14:52:17
要通过 JavaScript 数组获取 MongoDB 数据库，您可以使用 runCommand()。以下是在 JavaScript 数组中获取 MongoDB 数据库的查询语句
> use admin;
switched to db admin
> allDatabasesDetails = db.runCommand({listDatabases: 1});
这将产生以下输出 −
{
"databases" : [
{
"name" : "admin",
"sizeOnDisk" : 847872,
"empty" : false
},
{
"name" : "config",
"sizeOnDisk" : 98304,
"empty" : false
},
{
"name" : "local",
"sizeOnDisk" : 73728,
"empty" : false
},
{
"name" : "sample",
"sizeOnDisk" : 1273856,
"empty" : false
},
{
"name" : "sampleDemo",
"sizeOnDisk" : 352256,
"empty" : false
},
{
"name" : "studentSearch",
"sizeOnDisk" : 262144,
"empty" : false
},
{
"name" : "test",
"sizeOnDisk" : 9527296,
"empty" : false
}
],
"totalSize" : 12435456,
"ok" : 1
}
以下是获取数据库总数的查询:
> allDatabaseName = []
[ ]
> for (var j in allDatabasesDetails.databases) { allDatabaseName.push(dbs.databases[j].name) }
这将产生以下输出 −
7
