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[[["Facile à comprendre","easyToUnderstand","thumb-up"],["J'ai pu résoudre mon problème","solvedMyProblem","thumb-up"],["Autre","otherUp","thumb-up"]],[["Difficile à comprendre","hardToUnderstand","thumb-down"],["Informations ou exemple de code incorrects","incorrectInformationOrSampleCode","thumb-down"],["Il n'y a pas l'information/les exemples dont j'ai besoin","missingTheInformationSamplesINeed","thumb-down"],["Problème de traduction","translationIssue","thumb-down"],["Autre","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis content provides code samples and instructions for removing a label from a dataset in Google BigQuery using Go, Java, Node.js, and Python.\u003c/p\u003e\n"],["\u003cp\u003eThe examples demonstrate how to use the respective client libraries to interact with BigQuery and update dataset metadata to delete a label.\u003c/p\u003e\n"],["\u003cp\u003eEach code sample includes prerequisites such as authentication setup and links to relevant documentation for further exploration.\u003c/p\u003e\n"],["\u003cp\u003eThe process is shown through multiple languages: Go, Java, Node.js and python, all showcasing the same action.\u003c/p\u003e\n"],["\u003cp\u003eA specific label named "color" is removed from the dataset's metadata in the different examples.\u003c/p\u003e\n"]]],[],null,["# Delete a label from a dataset\n\nRemove a label from a dataset.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Deleting labels](/bigquery/docs/deleting-labels)\n\nCode sample\n-----------\n\n### Go\n\n\nBefore trying this sample, follow the Go setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Go API\nreference documentation](https://godoc.org/cloud.google.com/go/bigquery).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n import (\n \t\"context\"\n \t\"fmt\"\n\n \t\"cloud.google.com/go/bigquery\"\n )\n\n // deleteDatasetLabel demonstrates removing a specific label from a dataset's metadata.\n func deleteDatasetLabel(projectID, datasetID string) error {\n \t// projectID := \"my-project-id\"\n \t// datasetID := \"mydataset\"\n \tctx := context.Background()\n\n \tclient, err := bigquery.NewClient(ctx, projectID)\n \tif err != nil {\n \t\treturn fmt.Errorf(\"bigquery.NewClient: %w\", err)\n \t}\n \tdefer client.Close()\n\n \tds := client.Dataset(datasetID)\n \tmeta, err := ds.Metadata(ctx)\n \tif err != nil {\n \t\treturn err\n \t}\n \tupdate := bigquery.https://cloud.google.com/go/docs/reference/cloud.google.com/go/bigquery/latest/index.html#cloud_google_com_go_bigquery_DatasetMetadataToUpdate{}\n \tupdate.DeleteLabel(\"color\")\n \tif _, err := ds.Update(ctx, update, meta.ETag); err != nil {\n \t\treturn err\n \t}\n \treturn nil\n }\n\n### Java\n\n\nBefore trying this sample, follow the Java setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Java API\nreference documentation](/java/docs/reference/google-cloud-bigquery/latest/overview).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryException.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryOptions.html;\n import com.google.cloud.bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.Dataset.html;\n import java.util.HashMap;\n import java.util.Map;\n\n // Sample tp deletes a label on a dataset.\n public class DeleteLabelDataset {\n\n public static void main(String[] args) {\n // TODO(developer): Replace these variables before running the sample.\n String datasetName = \"MY_DATASET_NAME\";\n deleteLabelDataset(datasetName);\n }\n\n public static void deleteLabelDataset(String datasetName) {\n try {\n // Initialize client that will be used to send requests. This client only needs to be created\n // once, and can be reused for multiple requests.\n https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html bigquery = https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryOptions.html.getDefaultInstance().getService();\n\n // This example dataset starts with existing label { color: 'green' }\n https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.Dataset.html dataset = bigquery.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQuery.html#com_google_cloud_bigquery_BigQuery_getDataset_com_google_cloud_bigquery_DatasetId_com_google_cloud_bigquery_BigQuery_DatasetOption____(datasetName);\n // Add label to dataset\n Map\u003cString, String\u003e labels = new HashMap\u003c\u003e();\n labels.put(\"color\", null);\n\n dataset.https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.Dataset.html#com_google_cloud_bigquery_Dataset_toBuilder__().setLabels(labels).build().update();\n System.out.println(\"Dataset label deleted successfully\");\n } catch (https://cloud.google.com/java/docs/reference/google-cloud-bigquery/latest/com.google.cloud.bigquery.BigQueryException.html e) {\n System.out.println(\"Dataset label was not deleted. \\n\" + e.toString());\n }\n }\n }\n\n### Node.js\n\n\nBefore trying this sample, follow the Node.js setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Node.js API\nreference documentation](https://googleapis.dev/nodejs/bigquery/latest/index.html).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n // Import the Google Cloud client library\n const {BigQuery} = require('https://cloud.google.com/nodejs/docs/reference/bigquery/latest/overview.html');\n const bigquery = new https://cloud.google.com/nodejs/docs/reference/bigquery/latest/bigquery/bigquery.html();\n\n async function deleteLabelDataset() {\n // Deletes a label on a dataset.\n // This example dataset starts with existing label { color: 'green' }\n\n /**\n * TODO(developer): Uncomment the following lines before running the sample.\n */\n // const datasetId = 'my_dataset';\n\n // Retrieve current dataset metadata.\n const dataset = bigquery.dataset(datasetId);\n const [metadata] = await dataset.getMetadata();\n\n // Add label to dataset metadata\n metadata.labels = {color: null};\n const [apiResponse] = await dataset.setMetadata(metadata);\n\n console.log(`${datasetId} labels:`);\n console.log(apiResponse.labels);\n }\n\n### Python\n\n\nBefore trying this sample, follow the Python setup instructions in the\n[BigQuery quickstart using\nclient libraries](/bigquery/docs/quickstarts/quickstart-client-libraries).\n\n\nFor more information, see the\n[BigQuery Python API\nreference documentation](/python/docs/reference/bigquery/latest).\n\n\nTo authenticate to BigQuery, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for client libraries](/bigquery/docs/authentication#client-libs).\n\n\n from google.cloud import https://cloud.google.com/python/docs/reference/bigquery/latest/\n\n # Construct a BigQuery client object.\n client = https://cloud.google.com/python/docs/reference/bigquery/latest/.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html()\n\n # TODO(developer): Set dataset_id to the ID of the dataset to fetch.\n # dataset_id = \"your-project.your_dataset\"\n\n dataset = client.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html#google_cloud_bigquery_client_Client_get_dataset(dataset_id) # Make an API request.\n\n # To delete a label from a dataset, set its value to None.\n dataset.labels[\"color\"] = None\n\n dataset = client.https://cloud.google.com/python/docs/reference/bigquery/latest/google.cloud.bigquery.client.Client.html#google_cloud_bigquery_client_Client_update_dataset(dataset, [\"labels\"]) # Make an API request.\n print(\"Labels deleted from {}\".format(dataset_id))\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=bigquery)."]]