array-column

问题 Newbie trying to figure out the best way to design a Postgres db for the following use case scenario. There is an Account table for the business customers and there is a contacts table with a column relationship. account.pk_id, …. contacts.pk_id, contacts.fk_accountid … Thousands of different businesses in the Accounts table will be storing millions of contacts each in the Contacts table. Each contact record will over time belong to between 1 and 100 different categories, lists and products.

问题 Below is my array structure: Array ( [2016-09-01] => Array ( [1] => Array ( [hours_type_id] => 1 [date] => 2016-09-01 [hours] => 8.00 [ts_weekly_id] => 53428 ) [2] => Array ( [hours_type_id] => 2 [date] => 2016-09-01 [hours] => 0.00 [ts_weekly_id] => 53428 ) [10] => Array ( [hours_type_id] => 10 [date] => 2016-09-01 [hours] => 0.00 [ts_weekly_id] => 53428 ) ) I am trying to get all hours column in another array. Below is the code: $billcols = array_column($billhours, "hours"); Is there any

问题 I have a dataframe of format given below. movieId1 | genreList1 | genreList2 -------------------------------------------------- 1 |[Adventure,Comedy] |[Adventure] 2 |[Animation,Drama,War] |[War,Drama] 3 |[Adventure,Drama] |[Drama,War] and trying to create another flag column which shows whether genreList2 is a subset of genreList1 movieId1 | genreList1 | genreList2 | Flag --------------------------------------------------------------- 1 |[Adventure,Comedy] | [Adventure] |1 2 |[Animation,Drama

问题 I have the following associative array of column data: $where = array( 'id'=>array( 12, 13, 14 ), 'date'=>array( '1999-06-12', '2000-03-21', '2006-09-31' ) ); I need to transpose / rotate the structure to be an array of rows (with merged column data assigned to their respective row). I don't need the column names in the result. Expected output: $comb = array( array(12, '1999-06-12'), array(13, '2000-03-21'), array(14, '2006-09-31') ); 回答1: As Kris Roofe stated in his deleted answer, array

问题 Is there an efficient way to change the structure of this multidimensional array? I want to group the column values. //$arrayBefore [[5, 4, 10], [11, 13, 15], [32, 14, 15]]; Desired result: //$arrayAfter [[5, 11, 32], [4, 13, 14], [10, 15, 15]]; 回答1: You can do it based on array_column():- <?php $array = [[5, 4, 10], [11, 13, 15], [32, 14, 15]]; $final_array = [array_column($array,0),array_column($array,1),array_column($array,2)]; print_r($final_array ); Output:-https://eval.in/836310 Note:-