使用 db.表名.update 配合$unset 使用 例如我們的表noPk 有兩個列有字段名是script_type 我們要刪除script_type=kshell字段 > db.noPK.find() { "_id" : ObjectId("5a50642b908e6b07a84472a2"), "name" : "javascript", "value" : "vue.js" } { "_id" : ObjectId("5a50655b908e6b07a84472a3"), "name" : "Xshell", "type" : "script" } { "_id" : ObjectId("5a506b40908e6b07a84472a4"), "name" : "Xshell", "type" : "script" } { "_id" : ObjectId("5a506b9d908e6b07a84472a5"), "name" : "Xshell", "type" : "script", "script_type" : "bash_shell" } { "_id" : ObjectId("5a50703c908e6b07a84472a6"), "name" : "shell", "type" : "script", "script_type" : "kshell" } > 刪除: > db.noPK.update({"name": "shell"}, {$unset:{"script_type":"kshell"}}) WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 }) > db.noPK.find() { "_id" : ObjectId("5a50642b908e6b07a84472a2"), "name" : "javascript", "value" : "vue.js" } { "_id" : ObjectId("5a50655b908e6b07a84472a3"), "name" : "Xshell", "type" : "script" } { "_id" : ObjectId("5a506b40908e6b07a84472a4"), "name" : "Xshell", "type" : "script" } { "_id" : ObjectId("5a506b9d908e6b07a84472a5"), "name" : "Xshell", "type" : "script", "script_type" : "bash_shell" } { "_id" : ObjectId("5a50703c908e6b07a84472a6"), "name" : "shell", "type" : "script" } >

轉載于:https://www.cnblogs.com/SunshineLittleCat/p/8280096.html

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