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optimize sql query
2 Answer(s)      6 years and a month ago
Posted in : SQL

How to optimize sql query in mysql? Thanks!


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March 18, 2011 at 3:32 PM

Optimization of SQL Query depends on what you wanted to do? If you can write you code will work. Or if you just wanted to know how to write perfect query in SQL then see the example given below.. It can be used to retrieve all the data from your table where value is equal to UPPERCASE.

SELECT indexed_text FROM your_table WHERE upper(indexed_text) = 'UPPERCASE TEXT';

March 18, 2011 at 3:34 PM

in other example can retrieve the existing data from database table.

select * from products where public_id in 
   select public_id from products       
   group by public_id
   having sum(deleted) = 0
and online = 1

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