{"id":2754,"date":"2023-07-20T20:46:38","date_gmt":"2023-07-20T20:46:38","guid":{"rendered":"https:\/\/statorials.org\/hi\/%e0%a4%ae%e0%a5%8b%e0%a4%82%e0%a4%97%e0%a5%8b%e0%a4%a1%e0%a4%ac-%e0%a4%b8%e0%a4%ac%e0%a4%b8%e0%a5%8d%e0%a4%9f%e0%a5%8d%e0%a4%b0%e0%a4%bf%e0%a4%82%e0%a4%97\/"},"modified":"2023-07-20T20:46:38","modified_gmt":"2023-07-20T20:46:38","slug":"%e0%a4%ae%e0%a5%8b%e0%a4%82%e0%a4%97%e0%a5%8b%e0%a4%a1%e0%a4%ac-%e0%a4%b8%e0%a4%ac%e0%a4%b8%e0%a5%8d%e0%a4%9f%e0%a5%8d%e0%a4%b0%e0%a4%bf%e0%a4%82%e0%a4%97","status":"publish","type":"post","link":"https:\/\/statorials.org\/hi\/%e0%a4%ae%e0%a5%8b%e0%a4%82%e0%a4%97%e0%a5%8b%e0%a4%a1%e0%a4%ac-%e0%a4%b8%e0%a4%ac%e0%a4%b8%e0%a5%8d%e0%a4%9f%e0%a5%8d%e0%a4%b0%e0%a4%bf%e0%a4%82%e0%a4%97\/","title":{"rendered":"Mongodb: $susbtr \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0948\u0938\u0947 \u0915\u0930\u0947\u0902"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u0906\u092a \u0915\u093f\u0938\u0940 \u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0938\u0947 \u0938\u092c\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0928\u093f\u0915\u093e\u0932\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f MongoDB \u092e\u0947\u0902 <strong>$substr<\/strong> \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0930 \u0938\u0915\u0924\u0947 \u0939\u0948\u0902\u0964<\/span><\/p>\n<p> <span style=\"color: #000000;\">\u092f\u0939 \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0942\u0932 \u0938\u093f\u0902\u091f\u0948\u0915\u094d\u0938 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0930\u0924\u093e \u0939\u0948:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.myCollection.aggregate([\n  { <span style=\"color: #3366ff;\">$project<\/span> : {substring: { <span style=\"color: #3366ff;\">$substr<\/span> : [ \" <span style=\"color: #ff0000;\">$fullstring<\/span> \", 0, 4 ] }}}\n])<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\u092f\u0939 \u0935\u093f\u0936\u0947\u0937 \u0909\u0926\u093e\u0939\u0930\u0923 \u0938\u094d\u0925\u093f\u0924\u093f 0 \u0938\u0947 \u092a\u094d\u0930\u093e\u0930\u0902\u092d \u0915\u0930\u0915\u0947 &#8220;\u092b\u0941\u0932\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917&#8221; \u0932\u0947\u092c\u0932 \u0935\u093e\u0932\u0947 \u092b\u093c\u0940\u0932\u094d\u0921 \u0938\u0947 \u0938\u092d\u0940 \u091a\u093e\u0930 \u0935\u0930\u094d\u0923\u094b\u0902 \u0915\u094b \u0928\u093f\u0915\u093e\u0932\u0924\u093e \u0939\u0948\u0964<\/span><\/p>\n<p> <span style=\"color: #000000;\">\u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u0909\u0926\u093e\u0939\u0930\u0923 \u0926\u093f\u0916\u093e\u0924\u093e \u0939\u0948 \u0915\u093f \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u0926\u0938\u094d\u0924\u093e\u0935\u0947\u091c\u093c\u094b\u0902 \u0915\u0947 \u0938\u093e\u0925 \u0938\u0902\u0917\u094d\u0930\u0939 <span style=\"padding: 1px; border: 1px solid black;\">\u092c\u093f\u0915\u094d\u0930\u0940<\/span> \u0915\u0947 \u0938\u093e\u0925 \u0935\u094d\u092f\u0935\u0939\u093e\u0930 \u092e\u0947\u0902 \u0907\u0938 \u0935\u093e\u0915\u094d\u092f\u0935\u093f\u0928\u094d\u092f\u093e\u0938 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0948\u0938\u0947 \u0915\u093f\u092f\u093e \u091c\u093e\u090f:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.sales.insertOne({yearMonth: 201702, amount: <span style=\"color: #008000;\">40<\/span> })\ndb.sales.insertOne({yearMonth: 201802, amount: <span style=\"color: #008000;\">32<\/span> })\ndb.sales.insertOne({yearMonth: 201806, amount: <span style=\"color: #008000;\">19<\/span> })\ndb.sales.insertOne({yearMonth: 201910, amount: <span style=\"color: #008000;\">29<\/span> })\ndb.sales.insertOne({yearMonth: 201907, amount: <span style=\"color: #008000;\">35<\/span> })<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>\u0909\u0926\u093e\u0939\u0930\u0923: MongoDB \u092e\u0947\u0902 $susbtr \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0948\u0938\u0947 \u0915\u0930\u0947\u0902<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\u0939\u092e &#8220;yearMonth&#8221; \u092b\u093c\u0940\u0932\u094d\u0921 \u0938\u0947 \u092a\u0939\u0932\u0947 \u091a\u093e\u0930 \u0905\u0915\u094d\u0937\u0930 \u0928\u093f\u0915\u093e\u0932\u0928\u0947 \u0914\u0930 \u0909\u0928\u094d\u0939\u0947\u0902 &#8220;year&#8221; \u0928\u093e\u092e\u0915 \u090f\u0915 \u0928\u090f \u092b\u093c\u0940\u0932\u094d\u0921 \u092e\u0947\u0902 \u092a\u094d\u0930\u0926\u0930\u094d\u0936\u093f\u0924 \u0915\u0930\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u0915\u094b\u0921 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0930 \u0938\u0915\u0924\u0947 \u0939\u0948\u0902:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.sales.aggregate([\n  { <span style=\"color: #3366ff;\">$project<\/span> : {year: { <span style=\"color: #3366ff;\">$substr<\/span> : [ \" <span style=\"color: #ff0000;\">$yearMonth<\/span> \", 0, 4 ] }}}\n])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\u092f\u0939 \u0915\u094b\u0921 \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092a\u0930\u093f\u0923\u093e\u092e \u0909\u0924\u094d\u092a\u0928\u094d\u0928 \u0915\u0930\u0924\u093e \u0939\u0948:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ _id: ObjectId(\"620145544cb04b772fd7a929\"), year: '2017' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92a\"), year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92b\"), year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92c\"), year: '2019' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92d\"), year: '2019' }<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\u0927\u094d\u092f\u093e\u0928 \u0926\u0947\u0902 \u0915\u093f \u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u0926\u0938\u094d\u0924\u093e\u0935\u0947\u091c\u093c \u0915\u0947 &#8220;\u092e\u093e\u0939\u0935\u0930\u094d\u0937&#8221; \u092b\u093c\u0940\u0932\u094d\u0921 \u0915\u0947 \u092a\u0939\u0932\u0947 \u091a\u093e\u0930 \u0905\u0915\u094d\u0937\u0930 &#8220;\u0935\u0930\u094d\u0937&#8221; \u0932\u0947\u092c\u0932 \u0935\u093e\u0932\u0947 \u090f\u0915 \u0928\u090f \u092b\u093c\u0940\u0932\u094d\u0921 \u092e\u0947\u0902 \u092a\u094d\u0930\u0926\u0930\u094d\u0936\u093f\u0924 \u0939\u094b\u0924\u0947 \u0939\u0948\u0902\u0964<\/span><\/p>\n<p> <span style=\"color: #000000;\">\u092f\u0939 \u0927\u094d\u092f\u093e\u0928 \u0930\u0916\u0928\u093e \u092e\u0939\u0924\u094d\u0935\u092a\u0942\u0930\u094d\u0923 \u0939\u0948 \u0915\u093f \u092f\u0939 \u0915\u094b\u0921 \u0915\u0947\u0935\u0932 \u0938\u092c\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 <em>\u092a\u094d\u0930\u0926\u0930\u094d\u0936\u093f\u0924 \u0915\u0930\u0924\u093e \u0939\u0948<\/em> \u0964<\/span><\/p>\n<p> <span style=\"color: #000000;\">\u0935\u093e\u0938\u094d\u0924\u0935 \u092e\u0947\u0902 \u0907\u0938 \u0938\u092c\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0935\u093e\u0932\u0947 \u0938\u0902\u0917\u094d\u0930\u0939 \u092e\u0947\u0902 \u090f\u0915 \u0928\u092f\u093e \u092b\u093c\u0940\u0932\u094d\u0921 \u091c\u094b\u0921\u093c\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f, \u0939\u092e\u0947\u0902 \u0928\u093f\u092e\u094d\u0928\u093e\u0928\u0941\u0938\u093e\u0930 <strong>$merge<\/strong> \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0930\u0928\u0947 \u0915\u0940 \u0906\u0935\u0936\u094d\u092f\u0915\u0924\u093e \u0939\u0948:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.sales.aggregate([\n  { <span style=\"color: #3366ff;\">$project<\/span> : {year: { <span style=\"color: #3366ff;\">$substr<\/span> : [ \" <span style=\"color: #ff0000;\">$yearMonth<\/span> \", 0, 4 ] }}},\n  { <span style=\"color: #3366ff;\">$merge<\/span> : \"sales\" }\n])<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\u0905\u0926\u094d\u092f\u0924\u0928 \u0938\u0902\u0917\u094d\u0930\u0939 \u0905\u092c \u0907\u0938 \u092a\u094d\u0930\u0915\u093e\u0930 \u0926\u093f\u0916\u0924\u093e \u0939\u0948:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ _id: ObjectId(\"620145544cb04b772fd7a929\"),\n  yearMonth: 201702,\n  amount: 40,\n  year: '2017' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92a\"),\n  yearMonth: 201802,\n  amount: 32,\n  year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92b\"),\n  yearMonth: 201806,\n  amount: 19,\n  year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92c\"),\n  yearMonth: 201910,\n  amount: 29,\n  year: '2019' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92d\"),\n  yearMonth: 201907,\n  amount: 35,\n  year: '2019' }<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\u0927\u094d\u092f\u093e\u0928 \u0926\u0947\u0902 \u0915\u093f \u0938\u0902\u0917\u094d\u0930\u0939 \u092e\u0947\u0902 \u092a\u094d\u0930\u0924\u094d\u092f\u0947\u0915 \u0926\u0938\u094d\u0924\u093e\u0935\u0947\u091c\u093c \u092e\u0947\u0902 &#8220;\u0935\u0930\u094d\u0937&#8221; \u0936\u0940\u0930\u094d\u0937\u0915 \u0935\u093e\u0932\u093e \u0928\u092f\u093e \u092b\u093c\u0940\u0932\u094d\u0921 \u091c\u094b\u0921\u093c\u093e \u0917\u092f\u093e \u0939\u0948 \u0914\u0930 \u092f\u0939 &#8220;\u0935\u0930\u094d\u0937\u092e\u093e\u0939&#8221; \u092b\u093c\u0940\u0932\u094d\u0921 \u0915\u0947 \u092a\u0939\u0932\u0947 \u091a\u093e\u0930 \u0905\u0915\u094d\u0937\u0930 \u092a\u094d\u0930\u0926\u0930\u094d\u0936\u093f\u0924 \u0915\u0930\u0924\u093e \u0939\u0948\u0964<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\u0928\u094b\u091f<\/strong> : \u0906\u092a <strong>$substr<\/strong> \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0915\u0947 \u0932\u093f\u090f \u0938\u0902\u092a\u0942\u0930\u094d\u0923 \u0926\u0938\u094d\u0924\u093e\u0935\u0947\u091c\u093c <a href=\"https:\/\/docs.mongodb.com\/manual\/reference\/operator\/aggregation\/substr\/\" target=\"_blank\" rel=\"noopener\">\u092f\u0939\u093e\u0902<\/a> \u092a\u093e \u0938\u0915\u0924\u0947 \u0939\u0948\u0902\u0964<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>\u0905\u0924\u093f\u0930\u093f\u0915\u094d\u0924 \u0938\u0902\u0938\u093e\u0927\u0928<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">\u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u091f\u094d\u092f\u0942\u091f\u094b\u0930\u093f\u092f\u0932 \u092c\u0924\u093e\u0924\u0947 \u0939\u0948\u0902 \u0915\u093f MongoDB \u092e\u0947\u0902 \u0905\u0928\u094d\u092f \u0938\u093e\u092e\u093e\u0928\u094d\u092f \u0911\u092a\u0930\u0947\u0936\u0928 \u0915\u0948\u0938\u0947 \u0915\u0930\u0947\u0902:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/hi\/\u092e\u094b\u0902\u0917\u094b\u0921\u092c-\u092e\u0947\u0902-\u0936\u093e\u092e\u093f\u0932-\u0939\u0948\/\" target=\"_blank\" rel=\"noopener\">MongoDB: \u0915\u0948\u0938\u0947 \u091c\u093e\u0902\u091a\u0947\u0902 \u0915\u093f \u092b\u093c\u0940\u0932\u094d\u0921 \u092e\u0947\u0902 \u0915\u094b\u0908 \u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0939\u0948 \u092f\u093e \u0928\u0939\u0940\u0902<\/a><br \/> <a href=\"https:\/\/statorials.org\/hi\/\u092e\u094b\u0902\u0917\u094b\u0921\u092c-\u0915\u0949\u0928\u094d\u0938\u091f\u0947\u0928\u0947\u0936\u0928-\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917\u094d\u0938\/\" target=\"_blank\" rel=\"noopener\">MongoDB: \u0926\u094b \u092b\u093c\u0940\u0932\u094d\u0921 \u0915\u0940 \u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0915\u094b \u0915\u0948\u0938\u0947 \u0938\u0902\u092f\u094b\u091c\u093f\u0924 \u0915\u0930\u0947\u0902<\/a><br \/> <a href=\"https:\/\/statorials.org\/hi\/\u092e\u094b\u0902\u0917\u094b\u0921\u092c-\u092a\u094d\u0930\u0924\u093f\u0938\u094d\u0925\u093e\u092a\u0928-\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917\/\" target=\"_blank\" rel=\"noopener\">MongoDB: \u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917\u094d\u0938 \u0915\u094b \u0915\u0948\u0938\u0947 \u092c\u0926\u0932\u0947\u0902<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0906\u092a \u0915\u093f\u0938\u0940 \u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0938\u0947 \u0938\u092c\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0928\u093f\u0915\u093e\u0932\u0928\u0947 \u0915\u0947 \u0932\u093f\u090f MongoDB \u092e\u0947\u0902 $substr \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0930 \u0938\u0915\u0924\u0947 \u0939\u0948\u0902\u0964 \u092f\u0939 \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0942\u0932 \u0938\u093f\u0902\u091f\u0948\u0915\u094d\u0938 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0930\u0924\u093e \u0939\u0948: db.myCollection.aggregate([ { $project : {substring: { $substr : [ &#8221; $fullstring &#8220;, 0, 4 ] }}} ]) \u092f\u0939 \u0935\u093f\u0936\u0947\u0937 \u0909\u0926\u093e\u0939\u0930\u0923 \u0938\u094d\u0925\u093f\u0924\u093f 0 \u0938\u0947 \u092a\u094d\u0930\u093e\u0930\u0902\u092d \u0915\u0930\u0915\u0947 &#8220;\u092b\u0941\u0932\u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917&#8221; \u0932\u0947\u092c\u0932 \u0935\u093e\u0932\u0947 \u092b\u093c\u0940\u0932\u094d\u0921 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2754","post","type-post","status-publish","format-standard","hentry","category-3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MongoDB: $susbtr \u092b\u093c\u0902\u0915\u094d\u0936\u0928 \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0948\u0938\u0947 \u0915\u0930\u0947\u0902 - \u0938\u094d\u091f\u0947\u091f\u094b\u0932\u0949\u091c\u0940<\/title>\n<meta name=\"description\" content=\"\u092f\u0939 \u091f\u094d\u092f\u0942\u091f\u094b\u0930\u093f\u092f\u0932 \u0909\u0926\u093e\u0939\u0930\u0923\u094b\u0902 \u0915\u0947 \u0938\u093e\u0925 \u092c\u0924\u093e\u0924\u093e \u0939\u0948 \u0915\u093f \u0938\u094d\u091f\u094d\u0930\u093f\u0902\u0917 \u0938\u0947 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property=\"article:published_time\" content=\"2023-07-20T20:46:38+00:00\" \/>\n<meta name=\"author\" content=\"\u0921\u0949. \u092c\u0947\u0902\u091c\u093e\u092e\u093f\u0928 \u090f\u0902\u0921\u0930\u0938\u0928\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0926\u094d\u0935\u093e\u0930\u093e \u0932\u093f\u0916\u093f\u0924\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u0921\u0949. \u092c\u0947\u0902\u091c\u093e\u092e\u093f\u0928 \u090f\u0902\u0921\u0930\u0938\u0928\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u0905\u0928\u0941\u092e\u093e\u0928\u093f\u0924 \u092a\u0922\u093c\u0928\u0947 \u0915\u093e \u0938\u092e\u092f\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u092e\u093f\u0928\u091f\" \/>\n<script type=\"application\/ld+json\" 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