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Mysql count or PHP count

Discussion in 'Databases' started by whiteSensation, Apr 18, 2014.

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  1. #1
    What is better mysql count or PHP num rows?
     
    Solved! View solution.
    whiteSensation, Apr 18, 2014 IP
  2. #2
    When you COUNT(*) it takes in count column indexes, so it will be the best result. Mysql with MyISAM engine actually stores row count, it doensn't count all rows each time you try to count all rows. (based on primary key's column)

    Using PHP to count rows is not very smart, because you have to send data from mysql to php. Why do it when you can achieve the same on the mysql side?

    If the COUNT(*) is slow, you should run EXPLAIN on the query, and check if indexes are really used, and where should they be adde_
     
    Marko Platanic, Apr 18, 2014 IP
    nixonm likes this.
  3. junedc

    junedc Active Member

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    #3
    Agree. PHP in no way can count the db records. Somehow it will be using the mysql functions or sql to count behind the scene
     
    junedc, Apr 19, 2014 IP
  4. mymindrules

    mymindrules Greenhorn

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    #4
    You can use MySQL_num_rows if you want to count numbe of rows in the php still you can use count(*) and store it in the alias and read the variable from the array in order to get count , but according to e MySQL_num_rows is th best way
     
    mymindrules, Apr 22, 2014 IP
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  5. benaya

    benaya Well-Known Member

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    #5
    Always use mysql count based on the primary key,
     
    benaya, Jun 8, 2014 IP
  6. chrislim2888

    chrislim2888 Active Member

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    #6
    I also agree with mysql count that will provide you better response than PHP count.
     
    chrislim2888, Jun 25, 2014 IP
  7. toma_sum41

    toma_sum41 Member

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    #7
    Mysql count function , for sure !
     
    toma_sum41, Jul 28, 2014 IP