{"id":921,"date":"2021-02-01T15:35:56","date_gmt":"2021-02-01T15:35:56","guid":{"rendered":"http:\/\/www.andreagirardi.it\/blog\/?p=921"},"modified":"2021-02-04T11:15:27","modified_gmt":"2021-02-04T11:15:27","slug":"return-distinct-values-for-an-array-field","status":"publish","type":"post","link":"https:\/\/www.andreagirardi.it\/blog\/return-distinct-values-for-an-array-field\/","title":{"rendered":"Return Distinct Values for an Array Field"},"content":{"rendered":"\n<p>The following example returns the distinct values for the field sizes from all documents in the Collection1 collection:<\/p>\n\n\n\n<pre title=\"mongoDB query\" class=\"wp-block-code\"><code lang=\"javascript\" class=\"language-javascript\">db.getCollection('inventory').distinct('storeCode')<\/code><\/pre>\n\n\n\n<p>This will be the expected result:<\/p>\n\n\n\n<pre title=\"output\" class=\"wp-block-code\"><code lang=\"javascript\" class=\"language-javascript\">[\n     \"1502\", \"1002\", \"747\"\n]<\/code><\/pre>\n\n\n\n<p>Distinct, as for relational database, finds the distinct values for a specified field across a single collection or view and returns the results in an array.<\/p>\n<div class=\"sharedaddy sd-sharing-enabled\"><div class=\"robots-nocontent sd-block sd-social sd-social-icon-text sd-sharing\"><h3 class=\"sd-title\">Share this:<\/h3><div class=\"sd-content\"><ul><li class=\"share-linkedin\"><a rel=\"nofollow\" data-shared=\"sharing-linkedin-921\" class=\"share-linkedin sd-button share-icon\" href=\"https:\/\/www.andreagirardi.it\/blog\/return-distinct-values-for-an-array-field\/?share=linkedin\" target=\"_blank\" title=\"Click to share on LinkedIn\"><span>LinkedIn<\/span><\/a><\/li><li class=\"share-reddit\"><a rel=\"nofollow\" data-shared=\"\" class=\"share-reddit sd-button share-icon\" href=\"https:\/\/www.andreagirardi.it\/blog\/return-distinct-values-for-an-array-field\/?share=reddit\" target=\"_blank\" title=\"Click to share on 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