[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-08-18 (世界標準時間)。"],[[["\u003cp\u003eThis guide details how to verify data migration from a source database to a destination Cloud SQL instance.\u003c/p\u003e\n"],["\u003cp\u003eAt a minimum, confirm that the database instance and its tables have been successfully migrated to the Cloud SQL instance.\u003c/p\u003e\n"],["\u003cp\u003eThe Data Validation Tool, an open-source utility, can be used to compare data between the source and destination databases.\u003c/p\u003e\n"],["\u003cp\u003eThe validation process involves installing the Data Validation Tool, establishing connections to both databases, creating a table list, and executing the validation.\u003c/p\u003e\n"],["\u003cp\u003eFor large tables, it's recommended to perform validation during replication or filter tables to reduce runtime during the promotion window.\u003c/p\u003e\n"]]],[],null,["# Verify a migration\n\nThis page describes how to confirm that your migrated data is complete and\naccurate. At a minimum, you should run SQL statements to verify that your tables\nexist in the migrated Cloud SQL database. For a more precise\ndata comparison between the source and destination database,\nyou can\n[try using the open-source Data Validation Tool](#verify-dvt).\n\nVerify destination data with SQL statements\n-------------------------------------------\n\nYou can run SQL statements to verify that your tables\nexist in the migrated Cloud SQL database. Do the following:\n\n1. Connect to your Cloud SQL for PostgreSQL instance with a tool where you can run SQL commands against your migrated databases. For more information on connecting to Cloud SQL instances, see\n [Connection options](/sql/docs/postgres/connect-overview#tools_for_connecting_to)\n in Cloud SQL documentation.\n\n2. Run SQL commands to verify your migrated data. For example:\n\n - List all tables in the database: \n\n ```sql\n SELECT * FROM pg_catalog.pg_tables;\n ```\n - Verify the table contents: \n\n ```sql\n SELECT * FROM TABLE_NAME';\n ```\n\nVerify data with the Data Validation Tool\n-----------------------------------------\n\nThe [open-source Data Validation Tool](https://github.com/GoogleCloudPlatform/professional-services-data-validator) lets you perform very precise\ndata comparisons between two databases, but it requires creating network\nconnections to your source and destination databases.\n\nThe following steps show a minimal example:\n\n1. Deploy or use a virtual machine with access to both the source and the destination.\n\n2. In the virtual machine, create a folder in which to install the Data Validation Tool.\n\n3. Navigate to this folder.\n\n4. Use [`pip`](https://pip.pypa.io/en/stable/) to install the Data Validation Tool.\n\n ```\n pip install google-pso-data-validator\n ```\n5. Create connections to the source Oracle database and the destination Cloud SQL for PostgreSQL database:\n\n ```\n data-validation connections add -c source Oracle --host 'ip-address' --port port --user username --password pswd --database database-name\n data-validation connections add -c target Postgres --host 'ip-address' --port port --user username --password pswd --database database-name\n ```\n\n For example: \n\n ```\n data-validation connections add -c source Oracle --host '10.10.10.11' --port 1521 --user system --password pswd --database XE\n data-validation connections add -c target Postgres --host '10.10.10.12' --port 5432 --user postgres --password pswd --database postgres\n ```\n6. Create or generate a list of tables to compare data between the source and destination databases:\n\n ```\n export TABLES_LIST=$(data-validation find-tables --source-conn source --target-conn target --allowed-schemas schema-name)\n ```\n\n For example: \n\n ```\n export TABLES_LIST=$(data-validation find-tables --source-conn source --target-conn target --allowed-schemas public)\n ```\n7. Run full validation against all tables:\n\n ```\n data-validation validate column --source-conn source --target-conn target --tables-list \"${TABLES_LIST}\"\n ```\n\nWe suggest that you run this validation during replication to ensure relative\nconsistency. Large table queries may take too long to run during a small promotion\nwindow. In such cases, use the Data Validation Tool to add filters to reduce\nruntime or prepare the table list to include a subset of tables for the final\nvalidation."]]