How to copy database data to redis

Prerequisites: 1. redis sets the Intranet ip2.redis to use multiple databases to copy database data to the select3 database in redis. Prerequisites:
1. redis sets the Intranet ip Address
2. redis uses multiple databases

How to copy database data to select 3 in redis

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Prerequisites:
1. redis sets the Intranet ip Address
2. redis uses multiple databases

How to copy database data to select 3 in redis

The subject can write an init script to read data in batches and then write data to mysql ......