php - Database Schema suggestions please -


i have scenario , i'm confused how can go designing database schema it.

in software (php) there companies , applications.

companies need have licenses access applications.

now fields (for form while purchasing licenses) each application different.

for ex:

for application1:

fields are:

  1. no of users
  2. no of groups

for application2:

  1. no of users

for application3:

  1. number of hours of usage

prices based on these fields.

now need design schema on 1 page company can manage licenses applications.

how can make schema generic?

please help. thanks.

you can go type of structure

select * applicationmaster    | appid |      appname | ------------------------ |     1 | application1 | |     2 | application2 |

applicationmaster go main application related details won't repeated such name, date etc.

query 2:

select * applicationfield    | fieldid | appid |   fieldname | --------------------------------- |       1 |     1 |   noofusers | |       2 |     1 |  noofgroups | |       3 |     2 | nohourusage |

applicationfield can adjust number of field particular appid. appid 1 has 2 fields noofusers , noofgroups. capable adjust newer fields particular app if want.

query 3:

applicationvalue have values every license aplication have compid represents company has applied using fieldid refers applicationfield table can app values stored.

select * applicationvalue    | id | compid | fieldid | fieldvalue | -------------------------------------- |  1 |      1 |       1 |         50 | |  2 |      1 |       2 |        150 | |  3 |      2 |       3 |        350 | |  4 |      3 |       1 |        450 | |  5 |      3 |       2 |         50 |

applicationpricemaster stores price package each application. there multiple package application.

select * applicationpricemaster   | apppackage | appid | totalprice | ----------------------------------- |          1 |     1 |         50 | |          2 |     1 |        100 |

for each application package details posted in table.

select * applicationpricedetail   | apppackage | fieldid | quant | -------------------------------- |          1 |       1 |     1 | |          1 |       2 |     1 | |          2 |       1 |    10 | |          2 |       2 |     1 |

note please check structure complex , check type of queries running on these table , performance.

select apm.apppackage, totalprice applicationpricemaster apm inner join  (select apppackage applicationpricedetail fieldid=1 , quant=1)a on apm.apppackage = a.apppackage inner join (select apppackage applicationpricedetail fieldid=2 , quant=1)b on  a.apppackage=b.apppackage

sql fiddle:

| apppackage | totalprice | --------------------------- |          1 |         50 |

for single filter have use query, have increase number of inner query number of inner filter.

select apm.apppackage, totalprice applicationpricemaster apm inner join  (select apppackage applicationpricedetail fieldid=1 , quant=1)a on apm.apppackage = a.apppackage

note-this query quite complex , work if values same mentioned in packagedetail table , work if values 2 filter have remove 1 inner join if there 1 filter. suggest reconsider before using approach.


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