How to execute my mysql query faster .

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Hello guys is there any way on where can i execute my query faster ? here it us:

What I have tried:

select count(distinct(str_to_date(dwardate,'%m/%d/%Y'))) as tdays ,staffhouse,mealallowance,transporallowance " & _
",staffhouseto,mealto,transpoto,transpoeffective From employees " & _
"inner join EAC on eac.employeesid = employees.employeesid " & _
"inner join tbldwardetails on tbldwardetails.Employeesid = employees.employeesID " & _
"Inner join employeesAttendance on employeesAttendance.Employeesid = employees.employeesID " & _
"WHERE LOGTIMEIN <> '' AND LOGTIMEOUT<> '' AND Remarked <> 'OFFSET FROM' AND str_to_date(dwardate,'%m/%d/%Y') >= '" & dafrom & "' and str_to_date(dwardate,'%m/%d/%Y') <= '" & dato & "' and EMPLOYEES.employeesid = " & empids & " group by dwardate"

Posted 31-Jul-17 19:30pm

Member 13334743

Updated 31-Jul-17 20:50pm

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Graeme_Grant 1-Aug-17 2:06am

You have a lot of joins ... Have you viewed the query plan? Do you have indexes for the fields/columns that you are joining on?

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Bernhard Hiller · Answer 1 · 2017-07-31T20:50:00

Solution 1

Get rid of those str_to_date(dwardate,'%m/%d/%Y'), use the proper datetime type instead, and use a parameterized query.
Functions in WHERE clauses enforce table scans (instead of index lookups), and parameterized queries help you overcome formatting issues and SQL injection issues.

Posted 31-Jul-17 20:50pm

Bernhard Hiller