There are several ways to avoid full table indexes:
1. Create appropriate indexes: When creating an index, you need to select appropriate fields as indexes according to the actual situation to avoid creating useless indexes. At the same time, you must also avoid creating too many indexes, because too many indexes will affect the performance of the database.
2. Use a covering index: A covering index means that all the fields required in the query statement are in the index, and there is no need to query the data in the table. This can avoid a full table scan.
3. Partition table: Divide a large table into multiple small tables. Each small table has its own index. This can avoid full table scanning and improve query efficiency.
4. Use caching technology: cache frequently queried data into memory to reduce the number of database accesses and improve system performance.
5. Optimize query statements: Try to avoid using unnecessary query statements, such as complex query statements such as subqueries and joint queries, to optimize query conditions and reduce the amount of query data.