如何在Mongo Shell中列出所有集合？

  • Z时代
  • 2024-01-10
  • 分类：综合

要列出Mongo shell中的所有集合，可以使用函数getCollectionNames()。

语法如下-

db.getCollectionNames();

您可以使用另一个命令即集合。语法如下-

show collections;

要列出Mongo中的所有集合，请使用以上两个函数。查询如下-

> db.getCollectionNames();

以下是输出-

[
   "ConvertStringToDateDemo",
   "IdUpdateDemo",
   "ProductsInformation",
   "addFieldDemo",
   "addNewFieldToEveryDocument",
   "arrayInnerElementsDemo",
   "arrayLengthGreaterThanOne",
   "arrayOfArraysDemo",
   "caseInsensitiveDemo",
   "changeDataType",
   "changeType",
   "charactersAllowedDemo",
   "charactersDemo",
   "checkFieldContainsStringDemo",
   "checkSequenceDemo",
   "combinationOfArrayDemo",
   "conditionalSumDemo",
   "convertStringToNumberDemo",
   "copyThisCollectionToSampleDatabaseDemo",
   "countDemo",
   "createSequenceDemo",
   "distinctCountValuesDemo",
   "distinctRecordDemo",
   "distinctWithMultipleKeysDemo",
   "employeeInformation",
   "filterArray",
   "findAllDuplicateKeyDocumentDemo",
   "findByMultipleArrayDemo",
   "findDuplicateByKeyDemo",
   "findDuplicateRecordsDemo",
   "findSpecificValue",
   "findValueInArrayWithMultipleCriteriaDemo",
   "getLastNRecordsDemo",
   "getParticularElementFromArrayDemo",
   "getPartuclarElement",
   "getSizeOfArray",
   "groupByDateDemo",
   "incrementValueInNestedArrayDemo",
   "insertIfNotExistsDemo",
   "nestedArrayDemo",
   "notLikeOpeartorDemo",
   "regExpOnIntegerDemo",
   "removeArrayDemo",
   "removeArrayElement",
   "removeArrayElements",
   "removeDuplicateDocumentDemo",
   "removeElementFromDoublyNestedArrayDemo",
   "removeFieldCompletlyDemo",
   "removeObject",
   "renameFieldDemo",
   "reverseRegexDemo",
   "searchArrayDemo",
   "selectSingleFieldDemo",
   "singleFieldDemo",
   "sortDemo",
   "sortInnerArrayDemo",
   "sourceCollection",
   "stringFieldLengthDemo",
   "test.js",
   "uniqueIndexOnArrayDemo",
   "unwindOperatorDemo",
   "updateExactField",
   "updateIdDemo",
   "updateObjects"
]

这是第二个查询，显示来自Mongo的所有集合。查询如下-

> show collections;

以下是输出-

ConvertStringToDateDemo
IdUpdateDemo
ProductsInformation
addFieldDemo
addNewFieldToEveryDocument
arrayInnerElementsDemo
arrayLengthGreaterThanOne
arrayOfArraysDemo
caseInsensitiveDemo
changeDataType
changeType
charactersAllowedDemo
charactersDemo
checkFieldContainsStringDemo
checkSequenceDemo
combinationOfArrayDemo
conditionalSumDemo
convertStringToNumberDemo
copyThisCollectionToSampleDatabaseDemo
countDemo
createSequenceDemo
distinctCountValuesDemo
distinctRecordDemo
distinctWithMultipleKeysDemo
employeeInformation
filterArray
findAllDuplicateKeyDocumentDemo
findByMultipleArrayDemo
findDuplicateByKeyDemo
findDuplicateRecordsDemo
findSpecificValue
findValueInArrayWithMultipleCriteriaDemo
getLastNRecordsDemo
getParticularElementFromArrayDemo
getPartuclarElement
getSizeOfArray
groupByDateDemo
incrementValueInNestedArrayDemo
insertIfNotExistsDemo
nestedArrayDemo
notLikeOpeartorDemo
regExpOnIntegerDemo
removeArrayDemo
removeArrayElement
removeArrayElements
removeDuplicateDocumentDemo
removeElementFromDoublyNestedArrayDemo
removeFieldCompletlyDemo
removeObject
renameFieldDemo
reverseRegexDemo
searchArrayDemo
selectSingleFieldDemo
singleFieldDemo
sortDemo
sortInnerArrayDemo
sourceCollection
stringFieldLengthDemo
test.js
uniqueIndexOnArrayDemo
unwindOperatorDemo
updateExactField
updateIdDemo
updateObjects

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