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Modern web pages uses pagination to show query results. Using this method also optimizes query performance if the query returns large rows.Most of time index creates for the columns in where clause of sql queries to optimize sql queries. In addition to this you may use indexes for pagination and optimizing orders.
For example a pagination query likes this
select *
from product_orders
order by order_date
limit 100
product_orders tables have 5000000 records. Without index mysql engine must read all table rows sort by order_date then limit 100 records which is very inefficient shown in execution plan in MYSQL db. cost is 535090
Modern web pages uses pagination to show query results. Using this method also optimizes query performance if the query returns large rows.Most of time index creates for the columns in where clause of sql queries to optimize sql queries. In addition to this you may use indexes for pagination and optimizing orders.
For example a pagination query likes this
select *
from product_orders
order by order_date
limit 100
product_orders tables have 5000000 records. Without index mysql engine must read all table rows sort by order_date then limit 100 records which is very inefficient shown in execution plan in MYSQL db. cost is 535090
Execution Plan Without Index
Execution Plan Without Index
After creating index on order_date and looking execution plan cost is 1.1 which is 500000 times less then original query plan.
After creating index on order_date and looking execution plan cost is 1.1 which is 500000 times less then original query plan.
Execution Plan With Index
Execution Plan With Index
Blog
Pagination & Order by Optimization in Databases
Pagination & Order by Optimization in Databases
Blog
Pagination & Order by Optimization in Databases
