Understanding SQL optimization
In a database management system, SQL optimization is crucial. The effect of SQL optimization is directly correlated to the execution efficiency of SQL statements. Therefore, current mainstream relational databases provide some type of powerful SQL optimizer. Based on traditional relational databases, ShardingSphere provides distributed database solutions that include data sharding, read/write splitting, distributed transactions, and other functions.
To meet the associated queries and subqueries across multiple database instances in distributed scenarios, ShardingSphere provides built-in SQL optimization functions through the federation execution engine. This helps achieve the optimal performance of query statements in distributed scenarios.
SQL optimization definition
SQL optimization refers to the equivalent transformation process for query statements and generating efficient physical execution plans using query optimization technology, which...
