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How can I make my MySQL UPDATE faster?
Another way to get fast updates is to delay updates and then do many updates in a row later. Performing multiple updates together is much quicker than doing one at a time if you lock the table. For a MyISAM table that uses dynamic row format, updating a row to a longer total length may split the row.
How do you increase a price by 10 in SQL?
The standard way of expressing this is: update products set price = price * 1.1 where prod_name like ‘HP%’; The from clause is not necessary in this case.
How to optimize the search index in MySQL?
Set the configuration option innodb_optimize_fulltext_only=1 first. To keep the index maintenance period to a reasonable time, set the innodb_ft_num_word_optimize option to specify how many words to update in the search index, and run a sequence of OPTIMIZE TABLE statements until the search index is fully updated.
Where does the OPTIMIZE TABLE statement go in MySQL?
By default, the server writes OPTIMIZE TABLE statements to the binary log so that they replicate to replicas. To suppress logging, specify the optional NO_WRITE_TO_BINLOG keyword or its alias LOCAL . OPTIMIZE TABLE returns a result set with the columns shown in the following table.
How to optimize backup and recovery in MySQL?
Backup and Recovery Optimization Optimization Overview Optimizing SQL Statements Optimizing SELECT Statements WHERE Clause Optimization Range Optimization Index Merge Optimization Engine Condition Pushdown Optimization Index Condition Pushdown Optimization Nested-Loop Join Algorithms Nested Join Optimization Outer Join Optimization
How to optimize subqueries and view references in MySQL?
Optimizing Subqueries, Derived Tables, and View References Optimizing Subqueries, Derived Tables, and View References with Semijoin Transformations Optimizing Subqueries with Materialization Optimizing Subqueries with the EXISTS Strategy Optimizing Derived Tables and View References with Merging or Materialization